fixed first release log

pipeline/git/git.go

@@ -93,11 +93,20 @@ func getChangelog(tag string) (string, error) {
 	if err != nil {
 		return "", err
 	}
-	return git("log", "--pretty=oneline", "--abbrev-commit", prev+".."+tag)
+	if !prev.Tag {
+		return gitLog(prev.SHA, tag)
+	}
+	return gitLog(fmt.Sprintf("%v..%v", prev.SHA, tag))
+}
+
+func gitLog(refs ...string) (string, error) {
+	var args = []string{"log", "--pretty=oneline", "--abbrev-commit"}
+	args = append(args, refs...)
+	return git(args...)
 }
 
 func getInfo() (tag, commit string, err error) {
-	tag, err = cleanGit("describe", "--tags", "--abbrev=0", "--always")
+	tag, err = cleanGit("describe", "--tags", "--abbrev=0")
 	if err != nil {
 		return
 	}
@@ -105,10 +114,21 @@ func getInfo() (tag, commit string, err error) {
 	return
 }
 
-func previous(tag string) (previous string, err error) {
+func previous(tag string) (r ref, err error) {
-	previous, err = cleanGit("describe", "--tags", "--abbrev=0", "--always", tag+"^")
+	var previous string
+	var istag = true
+	previous, err = cleanGit("describe", "--tags", "--abbrev=0", tag+"^")
 	if err != nil {
+		istag = false
 		previous, err = cleanGit("rev-list", "--max-parents=0", "HEAD")
 	}
-	return
+	return ref{
+		Tag: istag,
+		SHA: previous,
+	}, err
+}
+
+type ref struct {
+	Tag bool
+	SHA string
 }

pipeline/git/git_test.go

@@ -2,6 +2,7 @@ package git
 
 import (
 	"io/ioutil"
+	"log"
 	"os"
 	"path/filepath"
 	"testing"
@@ -144,16 +145,45 @@ func TestChangelog(t *testing.T) {
 	gitCommit(t, "added feature 1")
 	gitCommit(t, "fixed bug 2")
 	gitTag(t, "v0.0.2")
+	s, _ := git("log", "--oneline")
+	log.Println("\n" + s)
 	var ctx = &context.Context{
 		Config: config.Project{},
 	}
 	assert.NoError(Pipe{}.Run(ctx))
 	assert.Equal("v0.0.2", ctx.Git.CurrentTag)
 	assert.Contains(ctx.ReleaseNotes, "## Changelog")
+	assert.NotContains(ctx.ReleaseNotes, "first")
 	assert.Contains(ctx.ReleaseNotes, "added feature 1")
 	assert.Contains(ctx.ReleaseNotes, "fixed bug 2")
 }
 
+func TestChangelogOfFirstRelease(t *testing.T) {
+	var assert = assert.New(t)
+	_, back := createAndChdir(t)
+	defer back()
+	gitInit(t)
+	var msgs = []string{
+		"initial commit",
+		"another one",
+		"one more",
+		"and finally this one",
+	}
+	for _, msg := range msgs {
+		gitCommit(t, msg)
+	}
+	gitTag(t, "v0.0.1")
+	var ctx = &context.Context{
+		Config: config.Project{},
+	}
+	assert.NoError(Pipe{}.Run(ctx))
+	assert.Equal("v0.0.1", ctx.Git.CurrentTag)
+	assert.Contains(ctx.ReleaseNotes, "## Changelog")
+	for _, msg := range msgs {
+		assert.Contains(ctx.ReleaseNotes, msg)
+	}
+}
+
 func TestCustomReleaseNotes(t *testing.T) {
 	var assert = assert.New(t)
 	_, back := createAndChdir(t)