feat: expand environment variables in maintainer

nfpm.go

@@ -159,7 +159,8 @@ func (c *Config) expandEnvVars() {
 		}
 	}
 
-	// Vendor field
+	// Maintainer and vendor fields
+	c.Info.Maintainer = os.Expand(c.Info.Maintainer, c.envMappingFunc)
 	c.Info.Vendor = os.Expand(c.Info.Vendor, c.envMappingFunc)
 
 	// Package signing related fields

nfpm_test.go

@@ -237,14 +237,15 @@ func TestParseEnhancedNestedNoGlob(t *testing.T) {
 
 func TestOptionsFromEnvironment(t *testing.T) {
 	const (
-		globalPass = "hunter2"
-		debPass    = "password123"
-		rpmPass    = "secret"
-		apkPass    = "foobar"
-		release    = "3"
-		version    = "1.0.0"
-		vendor     = "GoReleaser"
-		packager   = "nope"
+		globalPass      = "hunter2"
+		debPass         = "password123"
+		rpmPass         = "secret"
+		apkPass         = "foobar"
+		release         = "3"
+		version         = "1.0.0"
+		vendor          = "GoReleaser"
+		packager        = "nope"
+		maintainerEmail = "nope@example.com"
 	)
 
 	t.Run("version", func(t *testing.T) {
@@ -263,6 +264,15 @@ func TestOptionsFromEnvironment(t *testing.T) {
 		require.Equal(t, release, info.Release)
 	})
 
+	t.Run("maintainer", func(t *testing.T) {
+		os.Clearenv()
+		os.Setenv("GIT_COMMITTER_NAME", packager)
+		os.Setenv("GIT_COMMITTER_EMAIL", maintainerEmail)
+		info, err := nfpm.Parse(strings.NewReader("name: foo\nmaintainer: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"))
+		require.NoError(t, err)
+		require.Equal(t, fmt.Sprintf("%s <%s>", packager, maintainerEmail), info.Maintainer)
+	})
+
 	t.Run("vendor", func(t *testing.T) {
 		os.Clearenv()
 		os.Setenv("VENDOR", vendor)

www/docs/configuration.md

@@ -55,6 +55,7 @@ section: default
 priority: extra
 
 # Maintainer.
+# This will expand any env var you set in the field, eg maintainer: ${GIT_COMMITTER_NAME} <${GIT_COMMITTER_EMAIL}>
 # Defaults to empty on rpm and apk
 # Leaving the 'maintainer' field unset will not be allowed in a future version
 maintainer: Carlos Alexandro Becker <root@carlosbecker.com>