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# This is the list of envconfig authors for copyright purposes.
#
# This does not necessarily list everyone who has contributed code, since in
# some cases, their employer may be the copyright holder. To see the full list
# of contributors, see the revision history in source control.
Google LLC
Seth Vargo

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# Copyright The envconfig Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
test:
@go test \
-count=1 \
-short \
-timeout=5m \
-vet="${VETTERS}" \
./...
.PHONY: test
test-acc:
@go test \
-count=1 \
-race \
-shuffle=on \
-timeout=10m \
-vet="${VETTERS}" \
./...
.PHONY: test-acc

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# Envconfig
[![GoDoc](https://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://pkg.go.dev/mod/github.com/sethvargo/go-envconfig)
[![GitHub Actions](https://img.shields.io/github/workflow/status/sethvargo/go-envconfig/unit/main?style=flat-square)](https://github.com/sethvargo/go-envconfig/actions?query=branch%3Amain+-event%3Aschedule)
Envconfig populates struct field values based on environment variables or
arbitrary lookup functions. It supports pre-setting mutations, which is useful
for things like converting values to uppercase, trimming whitespace, or looking
up secrets.
**Note:** Versions prior to v0.2 used a different import path. This README and
examples are for v0.2+.
## Usage
Define a struct with fields using the `env` tag:
```go
type MyConfig struct {
Port int `env:"PORT"`
Username string `env:"USERNAME"`
}
```
Set some environment variables:
```sh
export PORT=5555
export USERNAME=yoyo
```
Process it using envconfig:
```go
package main
import (
"context"
"log"
"github.com/sethvargo/go-envconfig"
)
func main() {
ctx := context.Background()
var c MyConfig
if err := envconfig.Process(ctx, &c); err != nil {
log.Fatal(err)
}
// c.Port = 5555
// c.Username = "yoyo"
}
```
You can also use nested structs, just remember that any fields you want to
process must be public:
```go
type MyConfig struct {
Database *DatabaseConfig
}
type DatabaseConfig struct {
Port int `env:"PORT"`
Username string `env:"USERNAME"`
}
```
## Configuration
Use the `env` struct tag to define configuration.
### Overwrite
If overwrite is set, the value will be overwritten if there is an
environment variable match regardless if the value is non-zero.
```go
type MyStruct struct {
Port int `env:"PORT,overwrite"`
}
```
### Required
If a field is required, processing will error if the environment variable is
unset.
```go
type MyStruct struct {
Port int `env:"PORT,required"`
}
```
It is invalid to have a field as both `required` and `default`.
### Default
If an environment variable is not set, the field will be set to the default
value. Note that the environment variable must not be set (e.g. `unset PORT`).
If the environment variable is the empty string, that counts as a "value" and
the default will not be used.
```go
type MyStruct struct {
Port int `env:"PORT,default=5555"`
}
```
You can also set the default value to another field or value from the
environment, for example:
```go
type MyStruct struct {
DefaultPort int `env:"DEFAULT_PORT,default=5555"`
Port int `env:"OVERRIDE_PORT,default=$DEFAULT_PORT"`
}
```
The value for `Port` will default to the value of `DEFAULT_PORT`.
It is invalid to have a field as both `required` and `default`.
### Prefix
For shared, embedded structs, you can define a prefix to use when processing
struct values for that embed.
```go
type SharedConfig struct {
Port int `env:"PORT,default=5555"`
}
type Server1 struct {
// This processes Port from $FOO_PORT.
*SharedConfig `env:",prefix=FOO_"`
}
type Server2 struct {
// This processes Port from $BAR_PORT.
*SharedConfig `env:",prefix=BAR_"`
}
```
It is invalid to specify a prefix on non-struct fields.
### Delimiter
When parsing maps and slices, a comma (`,`) is the default element delimiter.
Define a custom delimiter with `delimiter`:
```go
type MyStruct struct {
MyVar map[string]string `env:"MYVAR,delimiter=;"`
```
```bash
export MYVAR="a:1;b:2"
# map[string]string{"a":"1", "b":"2"}
```
This is especially helpful when your values include the default delimiter
character.
```bash
export MYVAR="a:1,2,3;b:4,5"
# map[string]string{"a":"1,2,3", "b":"4,5"}
```
### Separator
When parsing maps, a colon (`:`) is the default key-value separator. Define a
separator with `separator`:
```go
type MyStruct struct {
MyVar map[string]string `env:"MYVAR,separator=="`
}
```
```bash
export MYVAR="a=b,c=d"
# map[string]string{"a":"b", "c":"d"}
```
This is especially helpful when your keys or values include the default
separator character.
```bash
export MYVAR="client=abcd::1/128,backend=abcd::2/128"
# map[string]string{"client":"abcd::1/128", "backend":"abcd::2/128"}
```
## Complex Types
### Durations
In the environment, `time.Duration` values are specified as a parsable Go
duration:
```go
type MyStruct struct {
MyVar time.Duration `env:"MYVAR"`
}
```
```bash
export MYVAR="10m" # 10 * time.Minute
```
### TextUnmarshaler / BinaryUnmarshaler
Types that implement `TextUnmarshaler` or `BinaryUnmarshaler` are processed as such.
### json.Unmarshaler
Types that implement `json.Unmarshaler` are processed as such.
### gob.Decoder
Types that implement `gob.Decoder` are processed as such.
### Slices
Slices are specified as comma-separated values:
```go
type MyStruct struct {
MyVar []string `env:"MYVAR"`
}
```
```bash
export MYVAR="a,b,c,d" # []string{"a", "b", "c", "d"}
```
Note that byte slices are special cased and interpreted as strings from the
environment.
### Maps
Maps are specified as comma-separated key:value pairs:
```go
type MyStruct struct {
MyVar map[string]string `env:"MYVAR"`
}
```
```bash
export MYVAR="a:b,c:d" # map[string]string{"a":"b", "c":"d"}
```
### Structs
Envconfig walks the entire struct, including nested structs, so deeply-nested
fields are also supported.
If a nested struct is a pointer type, it will automatically be instantianted to
the non-nil value. To change this behavior, see
(Initialization)[#Initialization].
### Custom
You can also define your own decoder for structs (see below).
## Prefixing
You can define a custom prefix using the `PrefixLookuper`. This will lookup
values in the environment by prefixing the keys with the provided value:
```go
type MyStruct struct {
MyVar string `env:"MYVAR"`
}
```
```go
// Process variables, but look for the "APP_" prefix.
l := envconfig.PrefixLookuper("APP_", envconfig.OsLookuper())
if err := envconfig.ProcessWith(ctx, &c, l); err != nil {
panic(err)
}
```
```bash
export APP_MYVAR="foo"
```
## Initialization
By default, all pointer fields are initialized (allocated) so they are not
`nil`. To disable this behavior, use the tag the field as `noinit`:
```go
type MyStruct struct {
// Without `noinit`, DeleteUser would be initialized to the default boolean
// value. With `noinit`, if the environment variable is not given, the value
// is kept as uninitialized (nil).
DeleteUser *bool `env:"DELETE_USER, noinit"`
}
```
This also applies to nested fields in a struct:
```go
type ParentConfig struct {
// Without `noinit` tag, `Child` would be set to `&ChildConfig{}` whether
// or not `FIELD` is set in the env var.
// With `noinit`, `Child` would stay nil if `FIELD` is not set in the env var.
Child *ChildConfig `env:",noinit"`
}
type ChildConfig struct {
Field string `env:"FIELD"`
}
```
The `noinit` tag is only applicable for pointer fields. Putting the tag on a
non-struct-pointer will return an error.
## Extension
All built-in types are supported except Func and Chan. If you need to define a
custom decoder, implement the `Decoder` interface:
```go
type MyStruct struct {
field string
}
func (v *MyStruct) EnvDecode(val string) error {
v.field = fmt.Sprintf("PREFIX-%s", val)
return nil
}
var _ envconfig.Decoder = (*MyStruct)(nil) // interface check
```
If you need to modify environment variable values before processing, you can
specify a custom `Mutator`:
```go
type Config struct {
Password `env:"PASSWORD"`
}
func resolveSecretFunc(ctx context.Context, key, value string) (string, error) {
if strings.HasPrefix(value, "secret://") {
return secretmanager.Resolve(ctx, value) // example
}
return value, nil
}
var config Config
envconfig.ProcessWith(ctx, &config, envconfig.OsLookuper(), resolveSecretFunc)
```
## Testing
Relying on the environment in tests can be troublesome because environment
variables are global, which makes it difficult to parallelize the tests.
Envconfig supports extracting data from anything that returns a value:
```go
lookuper := envconfig.MapLookuper(map[string]string{
"FOO": "bar",
"ZIP": "zap",
})
var config Config
envconfig.ProcessWith(ctx, &config, lookuper)
```
Now you can parallelize all your tests by providing a map for the lookup
function. In fact, that's how the tests in this repo work, so check there for an
example.
You can also combine multiple lookupers with `MultiLookuper`. See the GoDoc for
more information and examples.
## Inspiration
This library is conceptually similar to [kelseyhightower/envconfig](https://github.com/kelseyhightower/envconfig), with the following
major behavioral differences:
- Adds support for specifying a custom lookup function (such as a map), which
is useful for testing.
- Only populates fields if they contain zero or nil values if `overwrite` is unset.
This means you can pre-initialize a struct and any pre-populated fields will not
be overwritten during processing.
- Support for interpolation. The default value for a field can be the value of
another field.
- Support for arbitrary mutators that change/resolve data before type
conversion.

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// Copyright The envconfig Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package envconfig
import (
"encoding/base64"
"encoding/hex"
"strings"
)
// Base64Bytes is a slice of bytes where the information is base64-encoded in
// the environment variable.
type Base64Bytes []byte
// EnvDecode implements env.Decoder.
func (b *Base64Bytes) EnvDecode(val string) error {
val = strings.ReplaceAll(val, "+", "-")
val = strings.ReplaceAll(val, "/", "_")
val = strings.TrimRight(val, "=")
var err error
*b, err = base64.RawURLEncoding.DecodeString(val)
return err
}
// Bytes returns the underlying bytes.
func (b Base64Bytes) Bytes() []byte {
return []byte(b)
}
// HexBytes is a slice of bytes where the information is hex-encoded in the
// environment variable.
type HexBytes []byte
// EnvDecode implements env.Decoder.
func (b *HexBytes) EnvDecode(val string) error {
var err error
*b, err = hex.DecodeString(val)
return err
}
// Bytes returns the underlying bytes.
func (b HexBytes) Bytes() []byte {
return []byte(b)
}

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// Copyright The envconfig Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package envconfig populates struct fields based on environment variable
// values (or anything that responds to "Lookup"). Structs declare their
// environment dependencies using the `env` tag with the key being the name of
// the environment variable, case sensitive.
//
// type MyStruct struct {
// A string `env:"A"` // resolves A to $A
// B string `env:"B,required"` // resolves B to $B, errors if $B is unset
// C string `env:"C,default=foo"` // resolves C to $C, defaults to "foo"
//
// D string `env:"D,required,default=foo"` // error, cannot be required and default
// E string `env:""` // error, must specify key
// }
//
// All built-in types are supported except Func and Chan. If you need to define
// a custom decoder, implement Decoder:
//
// type MyStruct struct {
// field string
// }
//
// func (v *MyStruct) EnvDecode(val string) error {
// v.field = fmt.Sprintf("PREFIX-%s", val)
// return nil
// }
//
// In the environment, slices are specified as comma-separated values:
//
// export MYVAR="a,b,c,d" // []string{"a", "b", "c", "d"}
//
// In the environment, maps are specified as comma-separated key:value pairs:
//
// export MYVAR="a:b,c:d" // map[string]string{"a":"b", "c":"d"}
//
// If you need to modify environment variable values before processing, you can
// specify a custom mutator:
//
// type Config struct {
// Password `env:"PASSWORD_SECRET"`
// }
//
// func resolveSecretFunc(ctx context.Context, key, value string) (string, error) {
// if strings.HasPrefix(value, "secret://") {
// return secretmanager.Resolve(ctx, value) // example
// }
// return value, nil
// }
//
// var config Config
// ProcessWith(&config, OsLookuper(), resolveSecretFunc)
//
package envconfig
import (
"context"
"encoding"
"encoding/gob"
"encoding/json"
"errors"
"fmt"
"os"
"reflect"
"regexp"
"strconv"
"strings"
"time"
)
const (
envTag = "env"
optDefault = "default="
optDelimiter = "delimiter="
optNoInit = "noinit"
optOverwrite = "overwrite"
optPrefix = "prefix="
optRequired = "required"
optSeparator = "separator="
defaultDelimiter = ","
defaultSeparator = ":"
)
var envvarNameRe = regexp.MustCompile(`\A[a-zA-Z_][a-zA-Z0-9_]*\z`)
// Error is a custom error type for errors returned by envconfig.
type Error string
// Error implements error.
func (e Error) Error() string {
return string(e)
}
const (
ErrInvalidEnvvarName = Error("invalid environment variable name")
ErrInvalidMapItem = Error("invalid map item")
ErrLookuperNil = Error("lookuper cannot be nil")
ErrMissingKey = Error("missing key")
ErrMissingRequired = Error("missing required value")
ErrNoInitNotPtr = Error("field must be a pointer to have noinit")
ErrNotPtr = Error("input must be a pointer")
ErrNotStruct = Error("input must be a struct")
ErrPrefixNotStruct = Error("prefix is only valid on struct types")
ErrPrivateField = Error("cannot parse private fields")
ErrRequiredAndDefault = Error("field cannot be required and have a default value")
ErrUnknownOption = Error("unknown option")
)
// Lookuper is an interface that provides a lookup for a string-based key.
type Lookuper interface {
// Lookup searches for the given key and returns the corresponding string
// value. If a value is found, it returns the value and true. If a value is
// not found, it returns the empty string and false.
Lookup(key string) (string, bool)
}
// osLookuper looks up environment configuration from the local environment.
type osLookuper struct{}
// Verify implements interface.
var _ Lookuper = (*osLookuper)(nil)
func (o *osLookuper) Lookup(key string) (string, bool) {
return os.LookupEnv(key)
}
// OsLookuper returns a lookuper that uses the environment (os.LookupEnv) to
// resolve values.
func OsLookuper() Lookuper {
return new(osLookuper)
}
type mapLookuper map[string]string
var _ Lookuper = (*mapLookuper)(nil)
func (m mapLookuper) Lookup(key string) (string, bool) {
v, ok := m[key]
return v, ok
}
// MapLookuper looks up environment configuration from a provided map. This is
// useful for testing, especially in parallel, since it does not require you to
// mutate the parent environment (which is stateful).
func MapLookuper(m map[string]string) Lookuper {
return mapLookuper(m)
}
type multiLookuper struct {
ls []Lookuper
}
var _ Lookuper = (*multiLookuper)(nil)
func (m *multiLookuper) Lookup(key string) (string, bool) {
for _, l := range m.ls {
if v, ok := l.Lookup(key); ok {
return v, true
}
}
return "", false
}
// PrefixLookuper looks up environment configuration using the specified prefix.
// This is useful if you want all your variables to start with a particular
// prefix like "MY_APP_".
func PrefixLookuper(prefix string, l Lookuper) Lookuper {
if typ, ok := l.(*prefixLookuper); ok {
return &prefixLookuper{prefix: typ.prefix + prefix, l: typ.l}
}
return &prefixLookuper{prefix: prefix, l: l}
}
type prefixLookuper struct {
l Lookuper
prefix string
}
func (p *prefixLookuper) Lookup(key string) (string, bool) {
return p.l.Lookup(p.prefix + key)
}
// MultiLookuper wraps a collection of lookupers. It does not combine them, and
// lookups appear in the order in which they are provided to the initializer.
func MultiLookuper(lookupers ...Lookuper) Lookuper {
return &multiLookuper{ls: lookupers}
}
// Decoder is an interface that custom types/fields can implement to control how
// decoding takes place. For example:
//
// type MyType string
//
// func (mt MyType) EnvDecode(val string) error {
// return "CUSTOM-"+val
// }
//
type Decoder interface {
EnvDecode(val string) error
}
// MutatorFunc is a function that mutates a given value before it is passed
// along for processing. This is useful if you want to mutate the environment
// variable value before it's converted to the proper type.
type MutatorFunc func(ctx context.Context, k, v string) (string, error)
// options are internal options for decoding.
type options struct {
Default string
Delimiter string
Prefix string
Separator string
NoInit bool
Overwrite bool
Required bool
}
// Process processes the struct using the environment. See ProcessWith for a
// more customizable version.
func Process(ctx context.Context, i interface{}) error {
return ProcessWith(ctx, i, OsLookuper())
}
// ProcessWith processes the given interface with the given lookuper. See the
// package-level documentation for specific examples and behaviors.
func ProcessWith(ctx context.Context, i interface{}, l Lookuper, fns ...MutatorFunc) error {
return processWith(ctx, i, l, false, fns...)
}
// processWith is a helper that captures whether the parent wanted
// initialization.
func processWith(ctx context.Context, i interface{}, l Lookuper, parentNoInit bool, fns ...MutatorFunc) error {
if l == nil {
return ErrLookuperNil
}
v := reflect.ValueOf(i)
if v.Kind() != reflect.Ptr {
return ErrNotPtr
}
e := v.Elem()
if e.Kind() != reflect.Struct {
return ErrNotStruct
}
t := e.Type()
for i := 0; i < t.NumField(); i++ {
ef := e.Field(i)
tf := t.Field(i)
tag := tf.Tag.Get(envTag)
if !ef.CanSet() {
if tag != "" {
// There's an "env" tag on a private field, we can't alter it, and it's
// likely a mistake. Return an error so the user can handle.
return fmt.Errorf("%s: %w", tf.Name, ErrPrivateField)
}
// Otherwise continue to the next field.
continue
}
// Parse the key and options.
key, opts, err := keyAndOpts(tag)
if err != nil {
return fmt.Errorf("%s: %w", tf.Name, err)
}
// NoInit is only permitted on pointers.
if opts.NoInit && ef.Kind() != reflect.Ptr {
return fmt.Errorf("%s: %w", tf.Name, ErrNoInitNotPtr)
}
isNilStructPtr := false
setNilStruct := func(v reflect.Value) {
origin := e.Field(i)
if isNilStructPtr {
empty := reflect.New(origin.Type().Elem()).Interface()
// If a struct (after traversal) equals to the empty value, it means
// nothing was changed in any sub-fields. With the noinit opt, we skip
// setting the empty value to the original struct pointer (aka. keep it
// nil).
if !reflect.DeepEqual(v.Interface(), empty) || (!opts.NoInit && !parentNoInit) {
origin.Set(v)
}
}
}
// Initialize pointer structs.
for ef.Kind() == reflect.Ptr {
if ef.IsNil() {
if ef.Type().Elem().Kind() != reflect.Struct {
// This is a nil pointer to something that isn't a struct, like
// *string. Move along.
break
}
isNilStructPtr = true
// Use an empty struct of the type so we can traverse.
ef = reflect.New(ef.Type().Elem()).Elem()
} else {
ef = ef.Elem()
}
}
// Special case handle structs. This has to come after the value resolution in
// case the struct has a custom decoder.
if ef.Kind() == reflect.Struct {
for ef.CanAddr() {
ef = ef.Addr()
}
// Lookup the value, ignoring an error if the key isn't defined. This is
// required for nested structs that don't declare their own `env` keys,
// but have internal fields with an `env` defined.
val, found, usedDefault, err := lookup(key, opts, l)
if err != nil && !errors.Is(err, ErrMissingKey) {
return fmt.Errorf("%s: %w", tf.Name, err)
}
if found || usedDefault {
if ok, err := processAsDecoder(val, ef); ok {
if err != nil {
return err
}
setNilStruct(ef)
continue
}
}
plu := l
if opts.Prefix != "" {
plu = PrefixLookuper(opts.Prefix, l)
}
if err := processWith(ctx, ef.Interface(), plu, opts.NoInit, fns...); err != nil {
return fmt.Errorf("%s: %w", tf.Name, err)
}
setNilStruct(ef)
continue
}
// It's invalid to have a prefix on a non-struct field.
if opts.Prefix != "" {
return ErrPrefixNotStruct
}
// Stop processing if there's no env tag (this comes after nested parsing),
// in case there's an env tag in an embedded struct.
if tag == "" {
continue
}
// The field already has a non-zero value and overwrite is false, do not
// overwrite.
if !ef.IsZero() && !opts.Overwrite {
continue
}
val, found, usedDefault, err := lookup(key, opts, l)
if err != nil {
return fmt.Errorf("%s: %w", tf.Name, err)
}
// If the field already has a non-zero value and there was no value directly
// specified, do not overwrite the existing field. We only want to overwrite
// when the envvar was provided directly.
if !ef.IsZero() && !found {
continue
}
// Apply any mutators. Mutators are applied after the lookup, but before any
// type conversions. They always resolve to a string (or error), so we don't
// call mutators when the environment variable was not set.
if found || usedDefault {
for _, fn := range fns {
if fn != nil {
val, err = fn(ctx, key, val)
if err != nil {
return fmt.Errorf("%s: %w", tf.Name, err)
}
}
}
}
// If Delimiter is not defined set it to ","
if opts.Delimiter == "" {
opts.Delimiter = defaultDelimiter
}
// If Separator is not defined set it to ":"
if opts.Separator == "" {
opts.Separator = defaultSeparator
}
// Set value.
if err := processField(val, ef, opts.Delimiter, opts.Separator, opts.NoInit); err != nil {
return fmt.Errorf("%s(%q): %w", tf.Name, val, err)
}
}
return nil
}
// keyAndOpts parses the given tag value (e.g. env:"foo,required") and
// returns the key name and options as a list.
func keyAndOpts(tag string) (string, *options, error) {
parts := strings.Split(tag, ",")
key, tagOpts := strings.TrimSpace(parts[0]), parts[1:]
if key != "" && !envvarNameRe.MatchString(key) {
return "", nil, fmt.Errorf("%q: %w ", key, ErrInvalidEnvvarName)
}
var opts options
LOOP:
for i, o := range tagOpts {
o = strings.TrimSpace(o)
switch {
case o == optOverwrite:
opts.Overwrite = true
case o == optRequired:
opts.Required = true
case o == optNoInit:
opts.NoInit = true
case strings.HasPrefix(o, optPrefix):
opts.Prefix = strings.TrimPrefix(o, optPrefix)
case strings.HasPrefix(o, optDelimiter):
opts.Delimiter = strings.TrimPrefix(o, optDelimiter)
case strings.HasPrefix(o, optSeparator):
opts.Separator = strings.TrimPrefix(o, optSeparator)
case strings.HasPrefix(o, optDefault):
// If a default value was given, assume everything after is the provided
// value, including comma-seprated items.
o = strings.TrimLeft(strings.Join(tagOpts[i:], ","), " ")
opts.Default = strings.TrimPrefix(o, optDefault)
break LOOP
default:
return "", nil, fmt.Errorf("%q: %w", o, ErrUnknownOption)
}
}
return key, &opts, nil
}
// lookup looks up the given key using the provided Lookuper and options. The
// first boolean parameter indicates whether the value was found in the
// lookuper. The second boolean parameter indicates whether the default value
// was used.
func lookup(key string, opts *options, l Lookuper) (string, bool, bool, error) {
if key == "" {
// The struct has something like `env:",required"`, which is likely a
// mistake. We could try to infer the envvar from the field name, but that
// feels too magical.
return "", false, false, ErrMissingKey
}
if opts.Required && opts.Default != "" {
// Having a default value on a required value doesn't make sense.
return "", false, false, ErrRequiredAndDefault
}
// Lookup value.
val, found := l.Lookup(key)
if !found {
if opts.Required {
if pl, ok := l.(*prefixLookuper); ok {
key = pl.prefix + key
}
return "", false, false, fmt.Errorf("%w: %s", ErrMissingRequired, key)
}
if opts.Default != "" {
// Expand the default value. This allows for a default value that maps to
// a different variable.
val = os.Expand(opts.Default, func(i string) string {
s, ok := l.Lookup(i)
if ok {
return s
}
return ""
})
return val, false, true, nil
}
}
return val, found, false, nil
}
// processAsDecoder processes the given value as a decoder or custom
// unmarshaller.
func processAsDecoder(v string, ef reflect.Value) (bool, error) {
// Keep a running error. It's possible that a property might implement
// multiple decoders, and we don't know *which* decoder will succeed. If we
// get through all of them, we'll return the most recent error.
var imp bool
var err error
// Resolve any pointers.
for ef.CanAddr() {
ef = ef.Addr()
}
if ef.CanInterface() {
iface := ef.Interface()
// If a developer chooses to implement the Decoder interface on a type,
// never attempt to use other decoders in case of failure. EnvDecode's
// decoding logic is "the right one", and the error returned (if any)
// is the most specific we can get.
if dec, ok := iface.(Decoder); ok {
imp = true
err = dec.EnvDecode(v)
return imp, err
}
if tu, ok := iface.(encoding.TextUnmarshaler); ok {
imp = true
if err = tu.UnmarshalText([]byte(v)); err == nil {
return imp, nil
}
}
if tu, ok := iface.(json.Unmarshaler); ok {
imp = true
if err = tu.UnmarshalJSON([]byte(v)); err == nil {
return imp, nil
}
}
if tu, ok := iface.(encoding.BinaryUnmarshaler); ok {
imp = true
if err = tu.UnmarshalBinary([]byte(v)); err == nil {
return imp, nil
}
}
if tu, ok := iface.(gob.GobDecoder); ok {
imp = true
if err = tu.GobDecode([]byte(v)); err == nil {
return imp, nil
}
}
}
return imp, err
}
func processField(v string, ef reflect.Value, delimiter, separator string, noInit bool) error {
// If the input value is empty and initialization is skipped, do nothing.
if v == "" && noInit {
return nil
}
// Handle pointers and uninitialized pointers.
for ef.Type().Kind() == reflect.Ptr {
if ef.IsNil() {
ef.Set(reflect.New(ef.Type().Elem()))
}
ef = ef.Elem()
}
tf := ef.Type()
tk := tf.Kind()
// Handle existing decoders.
if ok, err := processAsDecoder(v, ef); ok {
return err
}
// We don't check if the value is empty earlier, because the user might want
// to define a custom decoder and treat the empty variable as a special case.
// However, if we got this far, none of the remaining parsers will succeed, so
// bail out now.
if v == "" {
return nil
}
switch tk {
case reflect.Bool:
b, err := strconv.ParseBool(v)
if err != nil {
return err
}
ef.SetBool(b)
case reflect.Float32, reflect.Float64:
f, err := strconv.ParseFloat(v, tf.Bits())
if err != nil {
return err
}
ef.SetFloat(f)
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32:
i, err := strconv.ParseInt(v, 0, tf.Bits())
if err != nil {
return err
}
ef.SetInt(i)
case reflect.Int64:
// Special case time.Duration values.
if tf.PkgPath() == "time" && tf.Name() == "Duration" {
d, err := time.ParseDuration(v)
if err != nil {
return err
}
ef.SetInt(int64(d))
} else {
i, err := strconv.ParseInt(v, 0, tf.Bits())
if err != nil {
return err
}
ef.SetInt(i)
}
case reflect.String:
ef.SetString(v)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
i, err := strconv.ParseUint(v, 0, tf.Bits())
if err != nil {
return err
}
ef.SetUint(i)
case reflect.Interface:
return fmt.Errorf("cannot decode into interfaces")
// Maps
case reflect.Map:
vals := strings.Split(v, delimiter)
mp := reflect.MakeMapWithSize(tf, len(vals))
for _, val := range vals {
pair := strings.SplitN(val, separator, 2)
if len(pair) < 2 {
return fmt.Errorf("%s: %w", val, ErrInvalidMapItem)
}
mKey, mVal := strings.TrimSpace(pair[0]), strings.TrimSpace(pair[1])
k := reflect.New(tf.Key()).Elem()
if err := processField(mKey, k, delimiter, separator, noInit); err != nil {
return fmt.Errorf("%s: %w", mKey, err)
}
v := reflect.New(tf.Elem()).Elem()
if err := processField(mVal, v, delimiter, separator, noInit); err != nil {
return fmt.Errorf("%s: %w", mVal, err)
}
mp.SetMapIndex(k, v)
}
ef.Set(mp)
// Slices
case reflect.Slice:
// Special case: []byte
if tf.Elem().Kind() == reflect.Uint8 {
ef.Set(reflect.ValueOf([]byte(v)))
} else {
vals := strings.Split(v, delimiter)
s := reflect.MakeSlice(tf, len(vals), len(vals))
for i, val := range vals {
val = strings.TrimSpace(val)
if err := processField(val, s.Index(i), delimiter, separator, noInit); err != nil {
return fmt.Errorf("%s: %w", val, err)
}
}
ef.Set(s)
}
}
return nil
}

1
vendor/github.com/sethvargo/go-githubactions/.gitignore generated vendored Normal file
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coverage.out

7
vendor/github.com/sethvargo/go-githubactions/AUTHORS generated vendored Normal file
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@@ -0,0 +1,7 @@
# This is the list of authors for copyright purposes.
#
# This does not necessarily list everyone who has contributed code, since in
# some cases, their employer may be the copyright holder. To see the full list
# of contributors, see the revision history in source control.
Seth Vargo

202
vendor/github.com/sethvargo/go-githubactions/LICENSE generated vendored Normal file
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@@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

29
vendor/github.com/sethvargo/go-githubactions/Makefile generated vendored Normal file
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@@ -0,0 +1,29 @@
# Copyright 2020 The Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
test:
@go test \
-count=1 \
-short \
-timeout=5m \
./...
.PHONY: test
test-acc:
@go test \
-count=1 \
-race \
-timeout=10m \
./...
.PHONY: test-acc

150
vendor/github.com/sethvargo/go-githubactions/README.md generated vendored Normal file
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# GitHub Actions SDK (Go)
[![GoDoc](https://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://pkg.go.dev/github.com/sethvargo/go-githubactions)
[![GitHub Actions](https://img.shields.io/github/workflow/status/sethvargo/go-githubactions/Test?style=flat-square)](https://github.com/sethvargo/go-githubactions/actions?query=workflow%3ATest)
This library provides an SDK for authoring [GitHub Actions][gh-actions] in Go. It has no external dependencies and provides a Go-like interface for interacting with GitHub Actions' build system.
## Installation
Download the library:
```text
$ go get -u github.com/sethvargo/go-githubactions/...
```
## Usage
The easiest way to use the library is by importing it and invoking the functions
at the root:
```go
import (
"github.com/sethvargo/go-githubactions"
)
func main() {
val := githubactions.GetInput("val")
if val == "" {
githubactions.Fatalf("missing 'val'")
}
}
```
You can also create an instance with custom fields that will be included in log messages:
```go
import (
"github.com/sethvargo/go-githubactions"
)
func main() {
actions := githubactions.WithFieldsMap(map[string]string{
"file": "myfile.js",
"line": "100",
})
val := actions.GetInput("val")
if val == "" {
actions.Fatalf("missing 'val'")
}
}
```
For more examples and API documentation, please see the [Go docs][godoc].
## Publishing
There are multiple ways to publish GitHub Actions written in Go:
- [Composite actions](https://github.com/FerretDB/github-actions/blob/2ae30fd2cdb635d8aefdaf9f770257e156c9f77b/extract-docker-tag/action.yml)
- [Pre-compiled binaries with a shim](https://full-stack.blend.com/how-we-write-github-actions-in-go.html)
- Docker containers (see below)
By default, GitHub Actions expects actions to be written in Node.js. For other languages like Go, you need to provide a `Dockerfile` and entrypoint instructions in an `action.yml` file:
```dockerfile
# your-repo/Dockerfile
FROM golang:1.18
RUN go build -o /bin/app .
ENTRYPOINT ["/bin/app"]
```
```yaml
# your-repo/action.yml
name: My action
author: My name
description: My description
runs:
using: docker
image: Dockerfile
```
And then users can import your action by the repository name:
```yaml
# their-repo/.github/workflows/thing.yml
steps:
- name: My action
uses: username/repo@latest
```
However, this will clone the entire repo and compile the Go code each time the action runs. Worse, it uses the Go base container which is a few hundred MBs and includes a ton of unnecessary things.
Fortunately, GitHub Actions can also source from a Docker container directly from Docker Hub:
```yaml
steps:
- name: My action
uses: docker://username/repo:latest
```
Now we can precompile and publish our Go Action as a Docker container, but we need to make it much, much smaller first. This can be achieved using multi-stage Docker builds:
```dockerfile
FROM golang:1.18 AS builder
ENV GO111MODULE=on \
CGO_ENABLED=0 \
GOOS=linux \
GOARCH=amd64
RUN apt-get -qq update && \
apt-get -yqq install upx
WORKDIR /src
COPY . .
RUN go build \
-ldflags "-s -w -extldflags '-static'" \
-o /bin/app \
. \
&& strip /bin/app \
&& upx -q -9 /bin/app
RUN echo "nobody:x:65534:65534:Nobody:/:" > /etc_passwd
FROM scratch
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /etc_passwd /etc/passwd
COPY --from=builder --chown=65534:0 /bin/app /app
USER nobody
ENTRYPOINT ["/app"]
```
The first step, uses a fat container to build, strip, and compress the compiled Go binary. Then, in the second step, the compiled and compressed binary is copied into a scratch (bare) container along with some SSL certificates and a `nobody` user in which to execute the container.
This will usually produce an image that is less than 10MB in size, making for
much faster builds.
[gh-actions]: https://github.com/features/actions
[godoc]: https://godoc.org/github.com/sethvargo/go-githubactions

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// Copyright 2020 The Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package githubactions provides an SDK for authoring GitHub Actions in Go. It
// has no external dependencies and provides a Go-like interface for interacting
// with GitHub Actions' build system.
package githubactions
import (
"bytes"
"context"
"encoding/json"
"fmt"
"html/template"
"io"
"net/http"
"net/url"
"os"
"strings"
"time"
"github.com/sethvargo/go-envconfig"
)
var (
// osExit allows `os.Exit()` to be stubbed during testing.
osExit = os.Exit
)
const (
addMaskCmd = "add-mask"
envCmd = "env"
outputCmd = "output"
pathCmd = "path"
stateCmd = "state"
// https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#multiline-strings
multiLineFileDelim = "_GitHubActionsFileCommandDelimeter_"
multilineFileCmd = "%s<<" + multiLineFileDelim + EOF + "%s" + EOF + multiLineFileDelim // ${name}<<${delimiter}${os.EOL}${convertedVal}${os.EOL}${delimiter}
addMatcherCmd = "add-matcher"
removeMatcherCmd = "remove-matcher"
groupCmd = "group"
endGroupCmd = "endgroup"
stepSummaryCmd = "step-summary"
debugCmd = "debug"
noticeCmd = "notice"
warningCmd = "warning"
errorCmd = "error"
errFileCmdFmt = "unable to write command to the environment file: %s"
)
// New creates a new wrapper with helpers for outputting information in GitHub
// actions format.
func New(opts ...Option) *Action {
a := &Action{
w: os.Stdout,
getenv: os.Getenv,
httpClient: &http.Client{
Timeout: 10 * time.Second,
},
}
for _, opt := range opts {
if opt == nil {
continue
}
a = opt(a)
}
return a
}
// Action is an internal wrapper around GitHub Actions' output and magic
// strings.
type Action struct {
w io.Writer
fields CommandProperties
getenv GetenvFunc
httpClient *http.Client
}
// IssueCommand issues a new GitHub actions Command. It panics if it cannot
// write to the output stream.
func (c *Action) IssueCommand(cmd *Command) {
if _, err := fmt.Fprint(c.w, cmd.String()+EOF); err != nil {
panic(fmt.Errorf("failed to issue command: %w", err))
}
}
// IssueFileCommand issues a new GitHub actions Command using environment files.
// It panics if writing to the file fails.
//
// https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#environment-files
//
// The TypeScript equivalent function:
//
// https://github.com/actions/toolkit/blob/4f7fb6513a355689f69f0849edeb369a4dc81729/packages/core/src/file-command.ts#L10-L23
//
// IssueFileCommand currently ignores the 'CommandProperties' field provided
// with the 'Command' argument as it's scope is unclear in the current
// TypeScript implementation.
func (c *Action) IssueFileCommand(cmd *Command) {
if err := c.issueFileCommand(cmd); err != nil {
panic(err)
}
}
// issueFileCommand is an internal-only helper that issues the command and
// returns an error to make testing easier.
func (c *Action) issueFileCommand(cmd *Command) (retErr error) {
e := strings.ReplaceAll(cmd.Name, "-", "_")
e = strings.ToUpper(e)
e = "GITHUB_" + e
filepath := c.getenv(e)
msg := []byte(cmd.Message + EOF)
f, err := os.OpenFile(filepath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
retErr = fmt.Errorf(errFileCmdFmt, err)
return
}
defer func() {
if err := f.Close(); err != nil && retErr == nil {
retErr = err
}
}()
if _, err := f.Write(msg); err != nil {
retErr = fmt.Errorf(errFileCmdFmt, err)
return
}
return
}
// AddMask adds a new field mask for the given string "p". After called, future
// attempts to log "p" will be replaced with "***" in log output. It panics if
// it cannot write to the output stream.
func (c *Action) AddMask(p string) {
// ::add-mask::<p>
c.IssueCommand(&Command{
Name: addMaskCmd,
Message: p,
})
}
// AddMatcher adds a new matcher with the given file path. It panics if it
// cannot write to the output stream.
func (c *Action) AddMatcher(p string) {
// ::add-matcher::<p>
c.IssueCommand(&Command{
Name: addMatcherCmd,
Message: p,
})
}
// RemoveMatcher removes a matcher with the given owner name. It panics if it
// cannot write to the output stream.
func (c *Action) RemoveMatcher(o string) {
// ::remove-matcher owner=<o>::
c.IssueCommand(&Command{
Name: removeMatcherCmd,
Properties: CommandProperties{
"owner": o,
},
})
}
// AddPath adds the string "p" to the path for the invocation. It panics if it
// cannot write to the output file.
//
// https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#adding-a-system-path
// https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/
func (c *Action) AddPath(p string) {
c.IssueFileCommand(&Command{
Name: pathCmd,
Message: p,
})
}
// SaveState saves state to be used in the "finally" post job entry point. It
// panics if it cannot write to the output stream.
//
// On 2022-10-11, GitHub deprecated "::save-state name=<k>::<v>" in favor of
// [environment files].
//
// [environment files]: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
func (c *Action) SaveState(k, v string) {
c.IssueFileCommand(&Command{
Name: stateCmd,
Message: fmt.Sprintf(multilineFileCmd, k, v),
})
}
// GetInput gets the input by the given name. It returns the empty string if the
// input is not defined.
func (c *Action) GetInput(i string) string {
e := strings.ReplaceAll(i, " ", "_")
e = strings.ToUpper(e)
e = "INPUT_" + e
return strings.TrimSpace(c.getenv(e))
}
// Group starts a new collapsable region up to the next ungroup invocation. It
// panics if it cannot write to the output stream.
func (c *Action) Group(t string) {
// ::group::<t>
c.IssueCommand(&Command{
Name: groupCmd,
Message: t,
})
}
// EndGroup ends the current group. It panics if it cannot write to the output
// stream.
func (c *Action) EndGroup() {
// ::endgroup::
c.IssueCommand(&Command{
Name: endGroupCmd,
})
}
// AddStepSummary writes the given markdown to the job summary. If a job summary
// already exists, this value is appended.
//
// https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#adding-a-job-summary
// https://github.blog/2022-05-09-supercharging-github-actions-with-job-summaries/
func (c *Action) AddStepSummary(markdown string) {
c.IssueFileCommand(&Command{
Name: stepSummaryCmd,
Message: markdown,
})
}
// AddStepSummaryTemplate adds a summary template by parsing the given Go
// template using html/template with the given input data. See AddStepSummary
// for caveats.
//
// This primarily exists as a convenience function that renders a template.
func (c *Action) AddStepSummaryTemplate(tmpl string, data any) error {
t, err := template.New("").Parse(tmpl)
if err != nil {
return fmt.Errorf("failed to parse template: %w", err)
}
var b bytes.Buffer
if err := t.Execute(&b, data); err != nil {
return fmt.Errorf("failed to execute template: %w", err)
}
c.AddStepSummary(b.String())
return nil
}
// SetEnv sets an environment variable. It panics if it cannot write to the
// output file.
//
// https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
// https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/
func (c *Action) SetEnv(k, v string) {
c.IssueFileCommand(&Command{
Name: envCmd,
Message: fmt.Sprintf(multilineFileCmd, k, v),
})
}
// SetOutput sets an output parameter. It panics if it cannot write to the
// output stream.
//
// On 2022-10-11, GitHub deprecated "::set-output name=<k>::<v>" in favor of
// [environment files].
//
// [environment files]: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
func (c *Action) SetOutput(k, v string) {
c.IssueFileCommand(&Command{
Name: outputCmd,
Message: fmt.Sprintf(multilineFileCmd, k, v),
})
}
// Debugf prints a debug-level message. It follows the standard fmt.Printf
// arguments, appending an OS-specific line break to the end of the message. It
// panics if it cannot write to the output stream.
func (c *Action) Debugf(msg string, args ...any) {
// ::debug <c.fields>::<msg, args>
c.IssueCommand(&Command{
Name: debugCmd,
Message: fmt.Sprintf(msg, args...),
Properties: c.fields,
})
}
// Noticef prints a notice-level message. It follows the standard fmt.Printf
// arguments, appending an OS-specific line break to the end of the message. It
// panics if it cannot write to the output stream.
func (c *Action) Noticef(msg string, args ...any) {
// ::notice <c.fields>::<msg, args>
c.IssueCommand(&Command{
Name: noticeCmd,
Message: fmt.Sprintf(msg, args...),
Properties: c.fields,
})
}
// Warningf prints a warning-level message. It follows the standard fmt.Printf
// arguments, appending an OS-specific line break to the end of the message. It
// panics if it cannot write to the output stream.
func (c *Action) Warningf(msg string, args ...any) {
// ::warning <c.fields>::<msg, args>
c.IssueCommand(&Command{
Name: warningCmd,
Message: fmt.Sprintf(msg, args...),
Properties: c.fields,
})
}
// Errorf prints a error-level message. It follows the standard fmt.Printf
// arguments, appending an OS-specific line break to the end of the message. It
// panics if it cannot write to the output stream.
func (c *Action) Errorf(msg string, args ...any) {
// ::error <c.fields>::<msg, args>
c.IssueCommand(&Command{
Name: errorCmd,
Message: fmt.Sprintf(msg, args...),
Properties: c.fields,
})
}
// Fatalf prints a error-level message and exits. This is equivalent to Errorf
// followed by os.Exit(1).
func (c *Action) Fatalf(msg string, args ...any) {
c.Errorf(msg, args...)
osExit(1)
}
// Infof prints message to stdout without any level annotations. It follows the
// standard fmt.Printf arguments, appending an OS-specific line break to the end
// of the message. It panics if it cannot write to the output stream.
func (c *Action) Infof(msg string, args ...any) {
if _, err := fmt.Fprintf(c.w, msg+EOF, args...); err != nil {
panic(fmt.Errorf("failed to write info command: %w", err))
}
}
// WithFieldsSlice includes the provided fields in log output. "f" must be a
// slice of k=v pairs. The given slice will be sorted. It panics if any of the
// string in the given slice does not construct a valid 'key=value' pair.
func (c *Action) WithFieldsSlice(f []string) *Action {
m := make(CommandProperties)
for _, s := range f {
pair := strings.SplitN(s, "=", 2)
if len(pair) < 2 {
panic(fmt.Sprintf("%q is not a proper k=v pair!", s))
}
m[pair[0]] = pair[1]
}
return c.WithFieldsMap(m)
}
// WithFieldsMap includes the provided fields in log output. The fields in "m"
// are automatically converted to k=v pairs and sorted.
func (c *Action) WithFieldsMap(m map[string]string) *Action {
return &Action{
w: c.w,
fields: m,
getenv: c.getenv,
httpClient: c.httpClient,
}
}
// idTokenResponse is the response from minting an ID token.
type idTokenResponse struct {
Value string `json:"value,omitempty"`
}
// GetIDToken returns the GitHub OIDC token from the GitHub Actions runtime.
func (c *Action) GetIDToken(ctx context.Context, audience string) (string, error) {
requestURL := c.getenv("ACTIONS_ID_TOKEN_REQUEST_URL")
if requestURL == "" {
return "", fmt.Errorf("missing ACTIONS_ID_TOKEN_REQUEST_URL in environment")
}
requestToken := c.getenv("ACTIONS_ID_TOKEN_REQUEST_TOKEN")
if requestToken == "" {
return "", fmt.Errorf("missing ACTIONS_ID_TOKEN_REQUEST_TOKEN in environment")
}
u, err := url.Parse(requestURL)
if err != nil {
return "", fmt.Errorf("failed to parse request URL: %w", err)
}
if audience != "" {
q := u.Query()
q.Set("audience", audience)
u.RawQuery = q.Encode()
}
req, err := http.NewRequestWithContext(ctx, "GET", u.String(), nil)
if err != nil {
return "", fmt.Errorf("failed to create HTTP request: %w", err)
}
req.Header.Set("Authorization", "Bearer "+requestToken)
resp, err := c.httpClient.Do(req)
if err != nil {
return "", fmt.Errorf("failed to make HTTP request: %w", err)
}
defer resp.Body.Close()
// This has moved to the io package in Go 1.16, but we still support up to Go
// 1.13 for now.
body, err := io.ReadAll(io.LimitReader(resp.Body, 64*1000))
if err != nil {
return "", fmt.Errorf("failed to read response body: %w", err)
}
body = bytes.TrimSpace(body)
if resp.StatusCode != 200 {
return "", fmt.Errorf("non-successful response from minting OIDC token: %s", body)
}
var tokenResp idTokenResponse
if err := json.Unmarshal(body, &tokenResp); err != nil {
return "", fmt.Errorf("failed to process response as JSON: %w", err)
}
return tokenResp.Value, nil
}
// Getenv retrieves the value of the environment variable named by the key.
// It uses an internal function that can be set with `WithGetenv`.
func (c *Action) Getenv(key string) string {
return c.getenv(key)
}
// GetenvFunc is an abstraction to make tests feasible for commands that
// interact with environment variables.
type GetenvFunc func(key string) string
// GitHubContext of current workflow.
//
// See: https://docs.github.com/en/actions/learn-github-actions/environment-variables
type GitHubContext struct {
Action string `env:"GITHUB_ACTION"`
ActionPath string `env:"GITHUB_ACTION_PATH"`
ActionRepository string `env:"GITHUB_ACTION_REPOSITORY"`
Actions bool `env:"GITHUB_ACTIONS"`
Actor string `env:"GITHUB_ACTOR"`
APIURL string `env:"GITHUB_API_URL,default=https://api.github.com"`
BaseRef string `env:"GITHUB_BASE_REF"`
Env string `env:"GITHUB_ENV"`
EventName string `env:"GITHUB_EVENT_NAME"`
EventPath string `env:"GITHUB_EVENT_PATH"`
GraphqlURL string `env:"GITHUB_GRAPHQL_URL,default=https://api.github.com/graphql"`
HeadRef string `env:"GITHUB_HEAD_REF"`
Job string `env:"GITHUB_JOB"`
Path string `env:"GITHUB_PATH"`
Ref string `env:"GITHUB_REF"`
RefName string `env:"GITHUB_REF_NAME"`
RefProtected bool `env:"GITHUB_REF_PROTECTED"`
RefType string `env:"GITHUB_REF_TYPE"`
// Repository is the owner and repository name. For example, octocat/Hello-World
// It is not recommended to use this field to acquire the repository name
// but to use the Repo method instead.
Repository string `env:"GITHUB_REPOSITORY"`
// RepositoryOwner is the repository owner. For example, octocat
// It is not recommended to use this field to acquire the repository owner
// but to use the Repo method instead.
RepositoryOwner string `env:"GITHUB_REPOSITORY_OWNER"`
RetentionDays int64 `env:"GITHUB_RETENTION_DAYS"`
RunAttempt int64 `env:"GITHUB_RUN_ATTEMPT"`
RunID int64 `env:"GITHUB_RUN_ID"`
RunNumber int64 `env:"GITHUB_RUN_NUMBER"`
ServerURL string `env:"GITHUB_SERVER_URL,default=https://github.com"`
SHA string `env:"GITHUB_SHA"`
StepSummary string `env:"GITHUB_STEP_SUMMARY"`
Workflow string `env:"GITHUB_WORKFLOW"`
Workspace string `env:"GITHUB_WORKSPACE"`
// Event is populated by parsing the file at EventPath, if it exists.
Event map[string]any
}
// Repo returns the username of the repository owner and repository name.
func (c *GitHubContext) Repo() (string, string) {
if c == nil {
return "", ""
}
// Based on https://github.com/actions/toolkit/blob/main/packages/github/src/context.ts
if c.Repository != "" {
parts := strings.SplitN(c.Repository, "/", 2)
if len(parts) == 1 {
return parts[0], ""
}
return parts[0], parts[1]
}
// If c.Repository is empty attempt to get the repo from the Event data.
var repoName string
// NOTE: differs from context.ts. Fall back to GITHUB_REPOSITORY_OWNER
ownerName := c.RepositoryOwner
if c.Event != nil {
if repo, ok := c.Event["repository"].(map[string]any); ok {
if name, ok := repo["name"].(string); ok {
repoName = name
}
if owner, ok := repo["owner"].(map[string]any); ok {
if name, ok := owner["name"].(string); ok {
ownerName = name
}
}
}
}
return ownerName, repoName
}
// Context returns the context of current action with the payload object
// that triggered the workflow
func (c *Action) Context() (*GitHubContext, error) {
ctx := context.Background()
lookuper := &wrappedLookuper{f: c.getenv}
var githubContext GitHubContext
if err := envconfig.ProcessWith(ctx, &githubContext, lookuper); err != nil {
return nil, fmt.Errorf("could not process github context variables: %w", err)
}
if githubContext.EventPath != "" {
eventData, err := os.ReadFile(githubContext.EventPath)
if err != nil && !os.IsNotExist(err) {
return nil, fmt.Errorf("could not read event file: %w", err)
}
if eventData != nil {
if err := json.Unmarshal(eventData, &githubContext.Event); err != nil {
return nil, fmt.Errorf("failed to unmarshal event payload: %w", err)
}
}
}
return &githubContext, nil
}
// wrappedLookuper creates a lookuper that wraps a given getenv func.
type wrappedLookuper struct {
f GetenvFunc
}
// Lookup implements a custom lookuper.
func (w *wrappedLookuper) Lookup(key string) (string, bool) {
if v := w.f(key); v != "" {
return v, true
}
return "", false
}

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// Copyright 2020 The Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package githubactions
import (
"context"
)
var (
defaultAction = New()
)
// IssueCommand issues an arbitrary GitHub actions Command.
func IssueCommand(cmd *Command) {
defaultAction.IssueCommand(cmd)
}
// IssueFileCommand issues a new GitHub actions Command using environment files.
func IssueFileCommand(cmd *Command) {
defaultAction.IssueFileCommand(cmd)
}
// AddMask adds a new field mask for the given string "p". After called, future
// attempts to log "p" will be replaced with "***" in log output.
func AddMask(p string) {
defaultAction.AddMask(p)
}
// AddMatcher adds a new matcher with the given file path.
func AddMatcher(p string) {
defaultAction.AddMatcher(p)
}
// RemoveMatcher removes a matcher with the given owner name.
func RemoveMatcher(o string) {
defaultAction.RemoveMatcher(o)
}
// AddPath adds the string "p" to the path for the invocation.
func AddPath(p string) {
defaultAction.AddPath(p)
}
// SaveState saves state to be used in the "finally" post job entry point.
func SaveState(k, v string) {
defaultAction.SaveState(k, v)
}
// GetInput gets the input by the given name.
func GetInput(i string) string {
return defaultAction.GetInput(i)
}
// Group starts a new collapsable region up to the next ungroup invocation.
func Group(t string) {
defaultAction.Group(t)
}
// EndGroup ends the current group.
func EndGroup() {
defaultAction.EndGroup()
}
// AddStepSummary writes the given markdown to the job summary. If a job summary
// already exists, this value is appended.
func AddStepSummary(markdown string) {
defaultAction.AddStepSummary(markdown)
}
// AddStepSummaryTemplate adds a summary template by parsing the given Go
// template using html/template with the given input data. See AddStepSummary
// for caveats.
//
// This primarily exists as a convenience function that renders a template.
func AddStepSummaryTemplate(tmpl string, data any) error {
return defaultAction.AddStepSummaryTemplate(tmpl, data)
}
// SetEnv sets an environment variable.
func SetEnv(k, v string) {
defaultAction.SetEnv(k, v)
}
// SetOutput sets an output parameter.
func SetOutput(k, v string) {
defaultAction.SetOutput(k, v)
}
// Debugf prints a debug-level message. The arguments follow the standard Printf
// arguments.
func Debugf(msg string, args ...any) {
defaultAction.Debugf(msg, args...)
}
// Noticef prints a notice-level message. The arguments follow the standard
// Printf arguments.
func Noticef(msg string, args ...any) {
defaultAction.Noticef(msg, args...)
}
// Errorf prints a error-level message. The arguments follow the standard Printf
// arguments.
func Errorf(msg string, args ...any) {
defaultAction.Errorf(msg, args...)
}
// Fatalf prints a error-level message and exits. This is equivalent to Errorf
// followed by os.Exit(1).
func Fatalf(msg string, args ...any) {
defaultAction.Fatalf(msg, args...)
}
// Infof prints a info-level message. The arguments follow the standard Printf
// arguments.
func Infof(msg string, args ...any) {
defaultAction.Infof(msg, args...)
}
// Warningf prints a warning-level message. The arguments follow the standard
// Printf arguments.
func Warningf(msg string, args ...any) {
defaultAction.Warningf(msg, args...)
}
// WithFieldsSlice includes the provided fields in log output. "f" must be a
// slice of k=v pairs. The given slice will be sorted.
func WithFieldsSlice(f []string) *Action {
return defaultAction.WithFieldsSlice(f)
}
// WithFieldsMap includes the provided fields in log output. The fields in "m"
// are automatically converted to k=v pairs and sorted.
func WithFieldsMap(m map[string]string) *Action {
return defaultAction.WithFieldsMap(m)
}
// GetIDToken returns the GitHub OIDC token from the GitHub Actions runtime.
func GetIDToken(ctx context.Context, audience string) (string, error) {
return defaultAction.GetIDToken(ctx, audience)
}
func Context() (*GitHubContext, error) {
return defaultAction.Context()
}

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// Copyright 2020 The Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package githubactions
import (
"fmt"
"sort"
"strings"
)
const (
cmdSeparator = "::"
cmdPropertiesPrefix = " "
)
// CommandProperties is a named "map[string]string" type to hold key-value pairs
// passed to an actions command.
type CommandProperties map[string]string
// String encodes the CommandProperties to a string as comma separated
// 'key=value' pairs. The pairs are joined in a chronological order.
func (props *CommandProperties) String() string {
l := make([]string, 0, len(*props))
for k, v := range *props {
l = append(l, fmt.Sprintf("%s=%s", k, escapeProperty(v)))
}
sort.Strings(l)
return strings.Join(l, ",")
}
// Command can be issued by a GitHub action by writing to `stdout` with
// following format.
//
// ::name key=value,key=value::message
//
// Examples:
// ::warning::This is the message
// ::set-env name=MY_VAR::some value
type Command struct {
Name string
Message string
Properties CommandProperties
}
// String encodes the Command to a string in the following format:
//
// ::name key=value,key=value::message
func (cmd *Command) String() string {
// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L43-L45
if cmd.Name == "" {
cmd.Name = "missing.command"
}
var builder strings.Builder
builder.WriteString(cmdSeparator)
builder.WriteString(cmd.Name)
if len(cmd.Properties) > 0 {
builder.WriteString(cmdPropertiesPrefix)
builder.WriteString(cmd.Properties.String())
}
builder.WriteString(cmdSeparator)
builder.WriteString(escapeData(cmd.Message))
return builder.String()
}
// escapeData escapes string values for presentation in the output of a command.
// This is a not-so-well-documented requirement of commands that define a
// message:
//
// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L74
//
// The equivalent toolkit function can be found here:
//
// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L92
//
func escapeData(v string) string {
v = strings.ReplaceAll(v, "%", "%25")
v = strings.ReplaceAll(v, "\r", "%0D")
v = strings.ReplaceAll(v, "\n", "%0A")
return v
}
// escapeData escapes command property values for presentation in the output of
// a command.
//
// https://github.com/actions/toolkit/blob/9ad01e4fd30025e8858650d38e95cfe9193a3222/packages/core/src/command.ts#L68
//
// The equivalent toolkit function can be found here:
//
// https://github.com/actions/toolkit/blob/1cc56db0ff126f4d65aeb83798852e02a2c180c3/packages/core/src/command.ts#L99-L106
func escapeProperty(v string) string {
v = strings.ReplaceAll(v, "%", "%25")
v = strings.ReplaceAll(v, "\r", "%0D")
v = strings.ReplaceAll(v, "\n", "%0A")
v = strings.ReplaceAll(v, ":", "%3A")
v = strings.ReplaceAll(v, ",", "%2C")
return v
}

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vendor/github.com/sethvargo/go-githubactions/eof_crlf.go generated vendored Normal file
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// Copyright 2021 The Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build windows
// +build windows
package githubactions
const EOF = "\r\n"

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// Copyright 2021 The Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !windows
// +build !windows
package githubactions
const EOF = "\n"

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vendor/github.com/sethvargo/go-githubactions/options.go generated vendored Normal file
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// Copyright 2021 The Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package githubactions
import (
"io"
"net/http"
)
// Option is a modifier for an Action.
type Option func(*Action) *Action
// WithWriter sets the writer function on an Action. By default, this will
// be `os.Stdout` from the standard library.
func WithWriter(w io.Writer) Option {
return func(a *Action) *Action {
a.w = w
return a
}
}
// WithFields sets the extra command field on an Action.
func WithFields(fields CommandProperties) Option {
return func(a *Action) *Action {
a.fields = fields
return a
}
}
// WithGetenv sets the `Getenv` function on an Action. By default, this will
// be `os.Getenv` from the standard library.
func WithGetenv(getenv GetenvFunc) Option {
return func(a *Action) *Action {
a.getenv = getenv
return a
}
}
// WithHTTPClient sets a custom HTTP client on the action. This is only used
// when the action makes output HTTP requests (such as generating an OIDC
// token).
func WithHTTPClient(c *http.Client) Option {
return func(a *Action) *Action {
a.httpClient = c
return a
}
}