github-release · Martin2112 · Feb 8, 2018
diff --git a/cmd.go b/cmd.go
@@ -10,6 +10,7 @@ import (
 	"net/url"
 	"os"
 	"strconv"
+	"strings"

 	"github.com/aktau/github-release/github"
 )
@@ -41,12 +42,6 @@ func infocmd(opt Options) error {
 		}
 	}

-	renderer := renderInfoText
-
-	if opt.Info.JSON {
-		renderer = renderInfoJSON
-	}
-
 	// List releases + assets.
 	var releases []Release
 	if tag == "" {
@@ -66,10 +61,23 @@ func infocmd(opt Options) error {
 		releases = []Release{*release}
 	}

-	return renderer(tags, releases)
+	renderer := renderInfoText
+
+	switch {
+	case opt.Info.JSON:
+		renderer = renderInfoJSON
+	case opt.Info.Markdown:
+		renderer = renderInfoMarkdown
+		if !opt.Info.Prerelease {
+			// Exclude pre-releases unless they were requested
+			releases = filterPreReleases(releases)
+		}
+	}
+
+	return renderer(opt.Info.Repo, tags, releases)
 }

-func renderInfoText(tags []Tag, releases []Release) error {
+func renderInfoText(_ string, tags []Tag, releases []Release) error {
 	fmt.Println("tags:")
 	for _, tag := range tags {
 		fmt.Println("-", &tag)
@@ -83,7 +91,7 @@ func renderInfoText(tags []Tag, releases []Release) error {
 	return nil
 }

-func renderInfoJSON(tags []Tag, releases []Release) error {
+func renderInfoJSON(_ string, tags []Tag, releases []Release) error {
 	out := struct {
 		Tags     []Tag
 		Releases []Release
@@ -97,6 +105,43 @@ func renderInfoJSON(tags []Tag, releases []Release) error {
 	return enc.Encode(&out)
 }

+func renderInfoMarkdown(repo string, tags []Tag, releases []Release) error {
+	tagMap := make(map[string]Tag)
+	for _, t := range tags {
+		tagMap[t.Name] = t
+	}
+
+	fmt.Printf("# %s Changelog\n", strings.ToTitle(repo))
+	fmt.Println()
+	for _, r := range releases {
+		fmt.Printf("## %s - %s\n\n", r.TagName, r.Name)
+		fmt.Printf("Published %s\n\n", r.Published)
+		fmt.Println(r.Description)
+		fmt.Println()
+		if len(r.TagName) != 0 {
+			t, ok := tagMap[r.TagName]
+			if !ok {
+				return fmt.Errorf("No definition for tag: %v in %v", r.TagName, r.Name)
+			}
+			fmt.Printf("Commit [%s](%s) Download [zip](%s)\n", t.Commit.Sha, t.Commit.Url, t.ZipBallUrl)
+			fmt.Println()
+		}
+	}
+
+	return nil
+}
+
+func filterPreReleases(releases []Release) []Release {
+	f := make([]Release, 0, len(releases))
+	for _, r := range releases {
+		if !r.Prerelease {
+			f = append(f, r)
+		}
+	}
+
+	return f
+}
+
 func uploadcmd(opt Options) error {
 	user := nvls(opt.Upload.User, EnvUser)
 	repo := nvls(opt.Upload.Repo, EnvRepo)

diff --git a/github-release.go b/github-release.go
@@ -63,11 +63,13 @@ type Options struct {
 		Tag   string `goptions:"-t, --tag, obligatory, description='Git tag of release to delete'"`
 	} `goptions:"delete"`
 	Info struct {
-		Token string `goptions:"-s, --security-token, description='Github token ($GITHUB_TOKEN if set). required if repo is private.'"`
-		User  string `goptions:"-u, --user, description='Github repo user or organisation (required if $GITHUB_USER not set)'"`
-		Repo  string `goptions:"-r, --repo, description='Github repo (required if $GITHUB_REPO not set)'"`
-		Tag   string `goptions:"-t, --tag, description='Git tag to query (optional)'"`
-		JSON  bool   `goptions:"-j, --json, description='Emit info as JSON instead of text'"`
+		Token      string `goptions:"-s, --security-token, description='Github token ($GITHUB_TOKEN if set). required if repo is private.'"`
+		User       string `goptions:"-u, --user, description='Github repo user or organisation (required if $GITHUB_USER not set)'"`
+		Repo       string `goptions:"-r, --repo, description='Github repo (required if $GITHUB_REPO not set)'"`
+		Tag        string `goptions:"-t, --tag, description='Git tag to query (optional)'"`
+		JSON       bool   `goptions:"-j, --json, description='Emit info as JSON instead of text'"`
+		Markdown   bool   `goptions:"-m, --markdown, description='Emit info as human readable markdown changelog.md'"`
+		Prerelease bool   `goptions:"-p, --pre-release, description='Include pre-releases in markdown output'"`
 	} `goptions:"info"`
 }