add .github/release.yml automatically when it doesn't exist

changelog.go

@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
-	"os"
 	"regexp"
 	"strings"
 	"time"
@@ -38,11 +37,6 @@ func convertKeepAChangelogFormat(md string, d time.Time) string {
 	return strings.TrimSpace(md) + "\n"
 }
 
-func exists(filename string) bool {
-	_, err := os.Stat(filename)
-	return err == nil
-}
-
 var changelogReg = regexp.MustCompile(`(?i)^# Change\s?log`)
 
 func insertNewChangelog(orig string, section string) string {

rcpr.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"net/url"
 	"os"
+	"path/filepath"
 	"regexp"
 	"strings"
 	"time"
@@ -123,13 +124,15 @@ func Run(ctx context.Context, argv []string, outStream, errStream io.Writer) err
 		return printVersion(outStream)
 	}
 
-	// main logic follows
 	rp, err := newRcpr(ctx, &commander{
 		gitPath: "git", outStream: outStream, errStream: errStream, dir: "."})
 	if err != nil {
 		return err
 	}
+	return rp.Run(ctx)
+}
 
+func (rp *rcpr) Run(ctx context.Context) error {
 	latestSemverTag := rp.latestSemverTag()
 	currVerStr := latestSemverTag
 	if currVerStr == "" {
@@ -224,14 +227,30 @@ func Run(ctx context.Context, argv []string, outStream, errStream io.Writer) err
 	} else {
 		vfile = rp.cfg.versionFile.String()
 	}
+	// TODO To be able to run some kind of change script set by configuration in advance.
+
 	if vfile != "" {
 		if err := bumpVersionFile(vfile, currVer, nextVer); err != nil {
 			return err
 		}
 	}
 	rp.c.GitE("add", "-f", rp.cfg.conf) // ignore any errors
 
-	// TODO To be able to run some kind of change script set by configuration in advance.
+	const releaseYml = ".github/release.yml"
+	// TODO: It would be nice to be able to add an exclude setting even if release.yml already exists.
+	if !exists(releaseYml) {
+		if err := os.MkdirAll(filepath.Dir(releaseYml), 0755); err != nil {
+			return err
+		}
+		if err := os.WriteFile(releaseYml, []byte(`changelog:
+  exclude:
+    labels:
+      - rcpr
+`), 0644); err != nil {
+			return err
+		}
+		rp.c.GitE("add", "-f", releaseYml)
+	}
 
 	rp.c.Git("commit", "--allow-empty", "-am", autoCommitMessage)
 

util.go

@@ -0,0 +1,8 @@
+package rcpr
+
+import "os"
+
+func exists(filename string) bool {
+	_, err := os.Stat(filename)
+	return err == nil
+}