feat(releaseprep): migrate standalone tool into vociferate

cmd/releaseprep/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"git.hrafn.xyz/aether/vociferate/internal/releaseprep"
+)
+
+func main() {
+	version := flag.String("version", "", "semantic version to release, with or without leading v")
+	date := flag.String("date", "", "release date in YYYY-MM-DD format")
+	recommend := flag.Bool("recommend", false, "print the recommended next release tag based on the changelog")
+	root := flag.String("root", ".", "repository root to update")
+	versionFile := flag.String("version-file", "", "path to the version file, relative to --root")
+	versionPattern := flag.String("version-pattern", "", "regexp with one capture group for the version value")
+	changelog := flag.String("changelog", "", "path to changelog file, relative to --root")
+	flag.Parse()
+
+	absRoot, err := filepath.Abs(*root)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "resolve root: %v\n", err)
+		os.Exit(1)
+	}
+
+	opts := releaseprep.Options{
+		VersionFile:    *versionFile,
+		VersionPattern: *versionPattern,
+		Changelog:      *changelog,
+	}
+
+	if *recommend {
+		tag, err := releaseprep.RecommendedTag(absRoot, opts)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "recommend release: %v\n", err)
+			os.Exit(1)
+		}
+		fmt.Println(tag)
+		return
+	}
+
+	if *version == "" || *date == "" {
+		fmt.Fprintln(os.Stderr, "usage: releaseprep --version <version> --date <YYYY-MM-DD> [--root <dir>] [--version-file <path>] [--version-pattern <regexp>] [--changelog <path>] | --recommend [--root <dir>] [--version-file <path>] [--version-pattern <regexp>] [--changelog <path>]")
+		os.Exit(2)
+	}
+
+	if err := releaseprep.Prepare(absRoot, *version, *date, opts); err != nil {
+		fmt.Fprintf(os.Stderr, "prepare release: %v\n", err)
+		os.Exit(1)
+	}
+}