feat(changelog): add first draft for changelog generation

.release.yml

@@ -1,11 +1,11 @@
 commitFormat: angular
 branch:
   master: release
-  sd: rc
+  rc: rc
-  sds: beta
+  beta: beta
-  travis: alpha
+  alpha: alpha
 changelog:
-  print: all/compact
+  printAll: false
   template: ''
   templatePath: ''
 release: 'github'

cmd/go-semantic-release/main.go

@@ -2,6 +2,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/Nightapes/go-semantic-release/pkg/config"
@@ -24,6 +25,11 @@ var (
 	setRepository = setCommand.Flag("repository", "Path to repository").String()
 	setConfigPath = setCommand.Flag("config", "Path to config file").Default(".release.yml").String()
 	setVersion    = setCommand.Arg("version", "semver version").Required().String()
+
+	getChangelog           = app.Command("changelog", "Print changelog.")
+	getChangelogRepository = getChangelog.Flag("repository", "Path to repository").String()
+	getChangelogConfigPath = getChangelog.Flag("config", "Path to config file").Default(".release.yml").String()
+	getChangelogFile       = getChangelog.Flag("file", "save changelog to file").Default("CHANGELOG.md").String()
 )
 
 func main() {
@@ -32,10 +38,11 @@ func main() {
 	case nextCommand.FullCommand():
 		setLoglevel(*loglevel)
 		s := semanticrelease.New(readConfig(nextConfigPath))
-		err := s.GetNextVersion(*nextRepository, *nextForce)
+		version, err := s.GetNextVersion(*nextRepository, *nextForce)
 		if err != nil {
 			log.Fatal(err)
 		}
+		fmt.Println(version)
 
 	case setCommand.FullCommand():
 		setLoglevel(*loglevel)
@@ -45,6 +52,13 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
+	case getChangelog.FullCommand():
+		setLoglevel(*loglevel)
+		s := semanticrelease.New(readConfig(getChangelogConfigPath))
+		err := s.GetChangelog(*getChangelogRepository, *getChangelogFile)
+		if err != nil {
+			log.Fatal(err)
+		}
 	}
 
 }

internal/analyzer/analyzer.go

@@ -3,24 +3,27 @@ package analyzer
 
 import (
 	"github.com/Nightapes/go-semantic-release/internal/gitutil"
+	"github.com/Nightapes/go-semantic-release/pkg/config"
 	log "github.com/sirupsen/logrus"
 )
 
 //Analyzer struct
 type Analyzer struct {
 	CommitFormat string
+	Config       config.ChangelogConfig
 }
 
-//Rules for commits
+//Rule for commits
-type Rules struct {
+type Rule struct {
 	Tag       string
+	TagString string
 	Release   string
 	Changelog bool
 }
 
 type analyzeCommit interface {
-	analyze(commit gitutil.Commit, tag string) (AnalyzedCommit, bool, error)
+	analyze(commit gitutil.Commit, tag Rule) (AnalyzedCommit, bool, error)
-	getRules() []Rules
+	getRules() []Rule
 }
 
 //AnalyzedCommit struct
@@ -30,12 +33,15 @@ type AnalyzedCommit struct {
 	Scope                       string
 	ParsedBreakingChangeMessage string
 	Tag                         string
+	TagString                   string
+	Print                       bool
 }
 
 //New Analyzer struct for given commit format
-func New(format string) *Analyzer {
+func New(format string, config config.ChangelogConfig) *Analyzer {
 	return &Analyzer{
 		CommitFormat: format,
+		Config:       config,
 	}
 
 }
@@ -58,8 +64,13 @@ func (a *Analyzer) Analyze(commits []gitutil.Commit) map[string][]AnalyzedCommit
 
 	for _, commit := range commits {
 		for _, rule := range commitAnalayzer.getRules() {
-			analyzedCommit, hasBreakingChange, err := commitAnalayzer.analyze(commit, rule.Tag)
+			analyzedCommit, hasBreakingChange, err := commitAnalayzer.analyze(commit, rule)
 			if err == nil {
+				if a.Config.PrintAll {
+					analyzedCommit.Print = true
+				} else {
+					analyzedCommit.Print = rule.Changelog
+				}
 				if hasBreakingChange {
 					analyzedCommits["major"] = append(analyzedCommits["major"], analyzedCommit)
 				} else {

internal/analyzer/angular.go

@@ -12,50 +12,59 @@ import (
 )
 
 type angular struct {
-	rules []Rules
+	rules []Rule
 	regex string
 }
 
 func newAngular() *angular {
 	return &angular{
 		regex: `(TAG)(?:\((.*)\))?: (.*)`,
-		rules: []Rules{
+		rules: []Rule{
 			{
 				Tag:       "feat",
+				TagString: "Features",
 				Release:   "minor",
 				Changelog: true,
 			},
 			{
 				Tag:       "fix",
+				TagString: "Bug fixes",
 				Release:   "patch",
 				Changelog: true,
 			}, {
 				Tag:       "perf",
+				TagString: "Performance improvments",
 				Release:   "patch",
 				Changelog: true,
 			}, {
 				Tag:       "docs",
+				TagString: "Documentation changes",
 				Release:   "none",
 				Changelog: false,
 			},
 			{
 				Tag:       "style",
+				TagString: "Style",
 				Release:   "none",
 				Changelog: false,
 			}, {
 				Tag:       "refactor",
+				TagString: "Code refactor",
 				Release:   "none",
 				Changelog: false,
 			}, {
 				Tag:       "test",
+				TagString: "Testing",
 				Release:   "none",
 				Changelog: false,
 			}, {
 				Tag:       "chore",
+				TagString: "Changes to the build process or auxiliary tools and libraries such as documentation generation",
 				Release:   "none",
 				Changelog: false,
 			}, {
 				Tag:       "build",
+				TagString: "Changes to ci config",
 				Release:   "none",
 				Changelog: false,
 			},
@@ -63,21 +72,23 @@ func newAngular() *angular {
 	}
 }
 
-func (a *angular) getRules() []Rules {
+func (a *angular) getRules() []Rule {
 	return a.rules
 }
 
-func (a *angular) analyze(commit gitutil.Commit, tag string) (AnalyzedCommit, bool, error) {
+func (a *angular) analyze(commit gitutil.Commit, rule Rule) (AnalyzedCommit, bool, error) {
 
 	analyzed := AnalyzedCommit{
 		Commit:    commit,
-		Tag:    tag,
+		Tag:       rule.Tag,
+		TagString: rule.TagString,
 	}
 
-	re := regexp.MustCompile(strings.Replace(a.regex, "TAG", tag, -1))
+	re := regexp.MustCompile(strings.Replace(a.regex, "TAG", rule.Tag, -1))
 	matches := re.FindAllStringSubmatch(commit.Message, -1)
 	if len(matches) >= 1 {
 		if len(matches[0]) >= 3 {
+
 			analyzed.Scope = matches[0][2]
 
 			message := strings.Join(matches[0][3:], "")
@@ -85,7 +96,7 @@ func (a *angular) analyze(commit gitutil.Commit, tag string) (AnalyzedCommit, bo
 
 			if len(splitted) == 1 {
 				analyzed.ParsedMessage = splitted[0]
-				log.Tracef("%s: found %s", commit.Message, tag)
+				log.Tracef("%s: found %s", commit.Message, rule.Tag)
 				return analyzed, false, nil
 			}
 			analyzed.ParsedMessage = splitted[0]
@@ -95,7 +106,7 @@ func (a *angular) analyze(commit gitutil.Commit, tag string) (AnalyzedCommit, bo
 
 		}
 	}
-	log.Tracef("%s does not match %s, skip", commit.Message, tag)
+	log.Tracef("%s does not match %s, skip", commit.Message, rule.Tag)
 	return analyzed, false, fmt.Errorf("Not found")
 
 }

internal/changelog/changelog.go

@@ -0,0 +1,82 @@
+package changelog
+
+import (
+	"bytes"
+	"text/template"
+	"time"
+
+	"github.com/Nightapes/go-semantic-release/internal/analyzer"
+	"github.com/Nightapes/go-semantic-release/pkg/config"
+)
+
+const defaultChangelogTitle string = `v{{.Version}} ({{.Now.Format "2006-01-02"}})`
+const defaultChangelog string = `{{ $version := .Version -}}
+{{ $backtick := .Backtick -}}
+# v{{.Version}} ({{.Now.Format "2006-01-02"}})
+{{ range $key, $commits := .Commits }}
+### {{ $key }}
+
+{{range $index,$commit := $commits}}* **{{$backtick}}{{$commit.Scope}}:{{$backtick}}** {{$commit.ParsedMessage}}
+{{ end -}}
+{{ end -}}
+`
+
+type changelogContent struct {
+	Commits  map[string][]analyzer.AnalyzedCommit
+	Version  string
+	Now      time.Time
+	Backtick string
+}
+
+//CommitFormat struct
+type Changelog struct {
+	config *config.ReleaseConfig
+}
+
+//New Changelog struct for generating changelog from commits
+func New(config *config.ReleaseConfig) *Changelog {
+	return &Changelog{
+		config: config,
+	}
+}
+
+// GenerateChanglog from given commits
+func (c *Changelog) GenerateChanglog(version string, analyzedCommits map[string][]analyzer.AnalyzedCommit) (string, string, error) {
+
+	commitsPerScope := map[string][]analyzer.AnalyzedCommit{}
+	for _, commits := range analyzedCommits {
+		for _, commit := range commits {
+			if commit.Print {
+				if _, ok := commitsPerScope[commit.TagString]; !ok {
+					commitsPerScope[commit.TagString] = make([]analyzer.AnalyzedCommit, 0)
+				}
+				commitsPerScope[commit.TagString] = append(commitsPerScope[commit.TagString], commit)
+			}
+		}
+	}
+
+	changelogContent := changelogContent{
+		Version:  version,
+		Commits:  commitsPerScope,
+		Now:      time.Now(),
+		Backtick: "`",
+	}
+
+	title, err := generateTemplate(defaultChangelogTitle, changelogContent)
+	content, err := generateTemplate(defaultChangelog, changelogContent)
+
+	return title, content, err
+}
+
+func generateTemplate(text string, values changelogContent) (string, error) {
+	var tpl bytes.Buffer
+	tmpl, err := template.New("template").Parse(text)
+	if err != nil {
+		return "", nil
+	}
+	err = tmpl.Execute(&tpl, values)
+	if err != nil {
+		return "", nil
+	}
+	return tpl.String(), nil
+}

pkg/config/config.go

@@ -10,7 +10,7 @@ import (
 
 // ChangelogConfig struct
 type ChangelogConfig struct {
-	Print        string `yaml:"print,omitempty"`
+	PrintAll     bool   `yaml:"printAll,omitempty"`
 	Template     string `yaml:"template,omitempty"`
 	TemplatePath string `yaml:"templatePath,omitempty"`
 }

pkg/semanticrelease/semantic-release.go

@@ -2,13 +2,14 @@
 package semanticrelease
 
 import (
-	"fmt"
+	"io/ioutil"
 	"strconv"
 	"strings"
 
 	"github.com/Masterminds/semver"
 	"github.com/Nightapes/go-semantic-release/internal/analyzer"
 	"github.com/Nightapes/go-semantic-release/internal/cache"
+	"github.com/Nightapes/go-semantic-release/internal/changelog"
 	"github.com/Nightapes/go-semantic-release/internal/gitutil"
 	"github.com/Nightapes/go-semantic-release/pkg/config"
 	log "github.com/sirupsen/logrus"
@@ -27,15 +28,15 @@ func New(c *config.ReleaseConfig) *SemanticRelease {
 }
 
 // GetNextVersion from .version or calculate new from commits
-func (s *SemanticRelease) GetNextVersion(repro string, force bool) error {
+func (s *SemanticRelease) GetNextVersion(repro string, force bool) (string, error) {
 	util, err := gitutil.New(repro)
 	if err != nil {
-		return err
+		return "", err
 	}
 
 	hash, err := util.GetHash()
 	if err != nil {
-		return err
+		return "", err
 	}
 
 	log.Debugf("Ignore .version file if exits, %t", force)
@@ -44,15 +45,14 @@ func (s *SemanticRelease) GetNextVersion(repro string, force bool) error {
 
 		if err == nil && content.Commit == hash {
 			log.Infof("Found cache, will return cached version %s", content.NextVersion)
-			fmt.Printf(content.NextVersion)
+			return content.NextVersion, err
-			return nil
 		}
 		log.Debugf("Mismatch git and version file  %s - %s", content.Commit, hash)
 	}
 
 	lastVersion, lastVersionHash, err := util.GetLastVersion()
 	if err != nil {
-		return err
+		return "", err
 	}
 	var newVersion semver.Version
 
@@ -65,17 +65,17 @@ func (s *SemanticRelease) GetNextVersion(repro string, force bool) error {
 
 	commits, err := util.GetCommits(lastVersionHash)
 	if err != nil {
-		return err
+		return "", err
 	}
 
 	log.Debugf("Found %d commits till last release", len(commits))
 
-	a := analyzer.New("angular")
+	a := analyzer.New(s.config.CommitFormat, s.config.Changelog)
 	result := a.Analyze(commits)
 
 	currentBranch, err := util.GetBranch()
 	if err != nil {
-		return err
+		return "", err
 	}
 
 	for branch, releaseType := range s.config.Branch {
@@ -99,11 +99,12 @@ func (s *SemanticRelease) GetNextVersion(repro string, force bool) error {
 	log.Infof("New version %s -> %s", lastVersion.String(), newVersion.String())
 	err = saveToCache(util, lastVersion, &newVersion)
 	if err != nil {
-		return err
+		return "", err
 	}
-	fmt.Printf("%s", newVersion.String())
+	c := changelog.New(s.config)
+	c.GenerateChanglog(newVersion.String(), result)
 
-	return err
+	return newVersion.String(), err
 }
 
 //SetVersion for git repository
@@ -175,3 +176,38 @@ func incPrerelease(preReleaseType string, version semver.Version) semver.Version
 
 	return version
 }
+
+// GetChangelog from last version till now
+func (s *SemanticRelease) GetChangelog(repro, file string) error {
+	nextVersion, err := s.GetNextVersion(repro, false)
+	if err != nil {
+		log.Debugf("Could not get next version")
+		return err
+	}
+
+	util, err := gitutil.New(repro)
+	if err != nil {
+		return err
+	}
+
+	_, lastVersionHash, err := util.GetLastVersion()
+	if err != nil {
+		return err
+	}
+
+	commits, err := util.GetCommits(lastVersionHash)
+	if err != nil {
+		return err
+	}
+
+	log.Debugf("Found %d commits till last release", len(commits))
+
+	a := analyzer.New(s.config.CommitFormat, s.config.Changelog)
+	result := a.Analyze(commits)
+
+	c := changelog.New(s.config)
+	_, content, err := c.GenerateChanglog(nextVersion, result)
+
+	return ioutil.WriteFile(file, []byte(content), 0644)
+
+}