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feat: add map and indexOrDefault template functions (#4317)
Add a new function `map` to template functions.
`map` creates a map from a list of pairs of key values, then you can
convert a key to a value using `.Get`. This simplifies writing
key-mapping templates. For example, the defaule `archives.name_template`
```yaml
name_template: >-
{{ .ProjectName }}_
{{- title .Os }}_
{{- if eq .Arch "amd64" }}x86_64
{{- else if eq .Arch "386" }}i386
{{- else }}{{ .Arch }}{{ end }}
{{- if .Arm }}v{{ .Arm }}{{ end }}
```
becomes
```yaml
name_template: >-
{{ $arch := map "amd64" "x86_64" "386" "i386" -}}
{{ .ProjectName }}_
{{- title .OS }}_
{{- $arch.Get .Arch .Arch }}
{{- if .Arm }}v{{ .Arm }}{{ end }}
```
---------
Co-authored-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>
This commit is contained in:
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@ -204,22 +204,24 @@ func (t *Template) Apply(s string) (string, error) {
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"time": func(s string) string {
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return time.Now().UTC().Format(s)
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},
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"tolower": strings.ToLower,
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"toupper": strings.ToUpper,
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"trim": strings.TrimSpace,
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"trimprefix": strings.TrimPrefix,
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"trimsuffix": strings.TrimSuffix,
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"title": cases.Title(language.English).String,
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"dir": filepath.Dir,
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"base": filepath.Base,
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"abs": filepath.Abs,
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"incmajor": incMajor,
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"incminor": incMinor,
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"incpatch": incPatch,
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"filter": filter(false),
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"reverseFilter": filter(true),
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"mdv2escape": mdv2Escape,
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"envOrDefault": t.envOrDefault,
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"tolower": strings.ToLower,
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"toupper": strings.ToUpper,
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"trim": strings.TrimSpace,
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"trimprefix": strings.TrimPrefix,
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"trimsuffix": strings.TrimSuffix,
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"title": cases.Title(language.English).String,
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"dir": filepath.Dir,
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"base": filepath.Base,
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"abs": filepath.Abs,
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"incmajor": incMajor,
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"incminor": incMinor,
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"incpatch": incPatch,
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"filter": filter(false),
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"reverseFilter": filter(true),
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"mdv2escape": mdv2Escape,
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"envOrDefault": t.envOrDefault,
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"map": makemap,
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"indexOrDefault": indexOrDefault,
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}).
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Parse(s)
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if err != nil {
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@ -346,3 +348,22 @@ func mdv2Escape(s string) string {
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"!", "\\!",
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).Replace(s)
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}
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func makemap(kvs ...string) (map[string]string, error) {
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if len(kvs)%2 != 0 {
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return nil, fmt.Errorf("map expects even number of arguments, got %d", len(kvs))
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}
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m := make(map[string]string)
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for i := 0; i < len(kvs); i += 2 {
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m[kvs[i]] = kvs[i+1]
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}
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return m, nil
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}
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func indexOrDefault(m map[string]string, name, value string) string {
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s, ok := m[name]
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if ok {
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return s
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}
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return value
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}
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@ -422,3 +422,13 @@ func TestMdv2Escape(t *testing.T) {
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"aaa\\_\\*\\[\\]\\(\\)\\~\\`\\>\\#\\+\\-\\=\\|\\{\\}\\.\\!",
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mdv2Escape("aaa_*[]()~`>#+-=|{}.!"))
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}
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func TestMap(t *testing.T) {
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ctx := testctx.New()
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out, err := New(ctx).Apply(`{{ $m := map "a" "1" "b" "2" }}{{ index $m "a" }}{{ indexOrDefault $m "b" "1" }}{{ indexOrDefault $m "c" "3" }}{{ index $m "z" }}`)
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require.NoError(t, err)
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require.Equal(t, "123", out)
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_, err = New(ctx).Apply(`{{ $m := map "a" }}`)
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require.ErrorContains(t, err, "map expects even number of arguments, got 1")
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}
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@ -138,24 +138,26 @@ In the `release.body` field, you can use these extra fields:
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On all fields, you have these available functions:
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| Usage | Description |
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| ------------------------------ | ------------------------------------------------------------------------------------------------------------------------------- |
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| `replace "v1.2" "v" ""` | replaces all matches. See [ReplaceAll](https://golang.org/pkg/strings/#ReplaceAll). |
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| `split "1.2" "."` | split string at separator. See [Split](https://golang.org/pkg/strings/#Split). Since v1.11 |
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| `time "01/02/2006"` | current UTC time in the specified format (this is not deterministic, a new time for every call). |
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| `tolower "V1.2"` | makes input string lowercase. See [ToLower](https://golang.org/pkg/strings/#ToLower). |
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| `toupper "v1.2"` | makes input string uppercase. See [ToUpper](https://golang.org/pkg/strings/#ToUpper). |
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| `trim " v1.2 "` | removes all leading and trailing white space. See [TrimSpace](https://golang.org/pkg/strings/#TrimSpace). |
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| `trimprefix "v1.2" "v"` | removes provided leading prefix string, if present. See [TrimPrefix](https://golang.org/pkg/strings/#TrimPrefix). |
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| `trimsuffix "1.2v" "v"` | removes provided trailing suffix string, if present. See [TrimSuffix](https://pkg.go.dev/strings#TrimSuffix). |
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| `dir .Path` | returns all but the last element of path, typically the path's directory. See [Dir](https://golang.org/pkg/path/filepath/#Dir). |
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| `base .Path` | returns the last element of path. See [Base](https://golang.org/pkg/path/filepath/#Base). Since v1.16 |
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| `abs .ArtifactPath` | returns an absolute representation of path. See [Abs](https://golang.org/pkg/path/filepath/#Abs). |
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| `filter "text" "regex"` | keeps only the lines matching the given regex, analogous to `grep -E`. Since v1.6 |
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| `reverseFilter "text" "regex"` | keeps only the lines **not** matching the given regex, analogous to `grep -vE`. Since v1.6 |
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| `title "foo"` | "titlenize" the string using english as language. See [Title](https://pkg.go.dev/golang.org/x/text/cases#Title). Since v1.14 |
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| `mdv2escape "foo"` | escape characters according to MarkdownV2, especially useful in the Telegram integration. Since v1.19 |
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| `envOrDefault "NAME" "value"` | either gets the value of the given environment variable, or the given default. Since v1.19 |
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| Usage | Description |
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|-----------------------------------|---------------------------------------------------------------------------------------------------------------------------------|
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| `replace "v1.2" "v" ""` | replaces all matches. See [ReplaceAll](https://golang.org/pkg/strings/#ReplaceAll). |
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| `split "1.2" "."` | split string at separator. See [Split](https://golang.org/pkg/strings/#Split). Since v1.11 |
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| `time "01/02/2006"` | current UTC time in the specified format (this is not deterministic, a new time for every call). |
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| `tolower "V1.2"` | makes input string lowercase. See [ToLower](https://golang.org/pkg/strings/#ToLower). |
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| `toupper "v1.2"` | makes input string uppercase. See [ToUpper](https://golang.org/pkg/strings/#ToUpper). |
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| `trim " v1.2 "` | removes all leading and trailing white space. See [TrimSpace](https://golang.org/pkg/strings/#TrimSpace). |
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| `trimprefix "v1.2" "v"` | removes provided leading prefix string, if present. See [TrimPrefix](https://golang.org/pkg/strings/#TrimPrefix). |
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| `trimsuffix "1.2v" "v"` | removes provided trailing suffix string, if present. See [TrimSuffix](https://pkg.go.dev/strings#TrimSuffix). |
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| `dir .Path` | returns all but the last element of path, typically the path's directory. See [Dir](https://golang.org/pkg/path/filepath/#Dir). |
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| `base .Path` | returns the last element of path. See [Base](https://golang.org/pkg/path/filepath/#Base). Since v1.16 |
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| `abs .ArtifactPath` | returns an absolute representation of path. See [Abs](https://golang.org/pkg/path/filepath/#Abs). |
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| `filter "text" "regex"` | keeps only the lines matching the given regex, analogous to `grep -E`. Since v1.6 |
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| `reverseFilter "text" "regex"` | keeps only the lines **not** matching the given regex, analogous to `grep -vE`. Since v1.6 |
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| `title "foo"` | "titlenize" the string using english as language. See [Title](https://pkg.go.dev/golang.org/x/text/cases#Title). Since v1.14 |
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| `mdv2escape "foo"` | escape characters according to MarkdownV2, especially useful in the Telegram integration. Since v1.19 |
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| `envOrDefault "NAME" "value"` | either gets the value of the given environment variable, or the given default. Since v1.19 |
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| `$m := map "KEY" "VALUE"` | creates a map from a list of key and value pairs. Since v1.21 |
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| `indexOrDefault $m "KEY" "value"` | either gets the value of the given key or the given default value from the given map. Since v1.21 |
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With all those fields, you may be able to compose the name of your artifacts
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pretty much the way you want:
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