feat: add support for git branch in templates (#1906)

Add a `.Branch` field to the text templates populated by the current git
branch.

Signed-off-by: Ben Kochie <superq@gmail.com>

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

internal/tmpl/tmpl.go

@@ -29,6 +29,7 @@ const (
 	version         = "Version"
 	rawVersion      = "RawVersion"
 	tag             = "Tag"
+	branch          = "Branch"
 	commit          = "Commit"
 	shortCommit     = "ShortCommit"
 	fullCommit      = "FullCommit"
@@ -74,6 +75,7 @@ func New(ctx *context.Context) *Template {
 			version:         ctx.Version,
 			rawVersion:      rawVersionV,
 			tag:             ctx.Git.CurrentTag,
+			branch:          ctx.Git.Branch,
 			commit:          ctx.Git.Commit,
 			shortCommit:     ctx.Git.ShortCommit,
 			fullCommit:      ctx.Git.FullCommit,

internal/tmpl/tmpl_test.go

@@ -26,6 +26,7 @@ func TestWithArtifact(t *testing.T) {
 		Minor: 2,
 		Patch: 3,
 	}
+	ctx.Git.Branch = "test-branch"
 	ctx.Git.Commit = "commit"
 	ctx.Git.FullCommit = "fullcommit"
 	ctx.Git.ShortCommit = "shortcommit"
@@ -38,6 +39,7 @@ func TestWithArtifact(t *testing.T) {
 		"1.2.3":       "{{.Version}}",
 		"v1.2.3":      "{{.Tag}}",
 		"1-2-3":       "{{.Major}}-{{.Minor}}-{{.Patch}}",
+		"test-branch": "{{.Branch}}",
 		"commit":      "{{.Commit}}",
 		"fullcommit":  "{{.FullCommit}}",
 		"shortcommit": "{{.ShortCommit}}",