Merge pull request #3 from bvieira/changelog

Feature: changelog command

README.md

@@ -55,14 +55,15 @@ git-sv rn -h
 
 ##### Available commands
 
-| Variable | description |
-| --------- | ---------- |
-| current-version, cv | get last released version from git |
-| next-version, nv | generate the next version based on git commit messages |
-| commit-log, cl | list all commit logs since last version as jsons |
-| release-notes, rn | generate release notes |
-| tag, tg | generate tag with version based on git commit messages |
-| help, h | Shows a list of commands or help for one command |
+| Variable | description | has options |
+| --------- | ---------- | :----------: |
+| current-version, cv | get last released version from git | :x: |
+| next-version, nv | generate the next version based on git commit messages | :x: |
+| commit-log, cl | list all commit logs since last version as jsons | :heavy_check_mark: |
+| release-notes, rn | generate release notes | :heavy_check_mark: |
+| changelog, cgl | generate changelog | :heavy_check_mark: |
+| tag, tg | generate tag with version based on git commit messages | :x: |
+| help, h | Shows a list of commands or help for one command | :x: |
 
 ## Development
 

cmd/git-sv/handlers.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"sort"
 	"sv4git/sv"
 	"time"
 
@@ -76,7 +77,7 @@ func getTagCommits(git sv.Git, tag string) ([]sv.GitCommitLog, error) {
 	return git.Log(prev, tag)
 }
 
-func releaseNotesHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcessor sv.ReleaseNoteProcessor) func(c *cli.Context) error {
+func releaseNotesHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcessor sv.ReleaseNoteProcessor, outputFormatter sv.OutputFormatter) func(c *cli.Context) error {
 	return func(c *cli.Context) error {
 		var commits []sv.GitCommitLog
 		var rnVersion semver.Version
@@ -93,8 +94,8 @@ func releaseNotesHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor,
 			return err
 		}
 
-		releasenote := rnProcessor.Get(date, commits)
-		fmt.Println(rnProcessor.Format(releasenote, rnVersion))
+		releasenote := rnProcessor.Create(rnVersion, date, commits)
+		fmt.Println(outputFormatter.FormatReleaseNote(releasenote))
 		return nil
 	}
 }
@@ -161,7 +162,7 @@ func getNextVersionInfo(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) (
 	return semverProcessor.NextVersion(currentVer, commits), time.Now(), commits, nil
 }
 
-func tagHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcessor sv.ReleaseNoteProcessor) func(c *cli.Context) error {
+func tagHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) func(c *cli.Context) error {
 	return func(c *cli.Context) error {
 		describe := git.Describe()
 
@@ -184,3 +185,46 @@ func tagHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcess
 		return nil
 	}
 }
+
+func changelogHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcessor sv.ReleaseNoteProcessor, formatter sv.OutputFormatter) func(c *cli.Context) error {
+	return func(c *cli.Context) error {
+
+		tags, err := git.Tags()
+		if err != nil {
+			return err
+		}
+		sort.Slice(tags, func(i, j int) bool {
+			return tags[i].Date.After(tags[j].Date)
+		})
+
+		var releaseNotes []sv.ReleaseNote
+
+		size := c.Int("size")
+		all := c.Bool("all")
+		for i, tag := range tags {
+			if !all && i >= size {
+				break
+			}
+
+			previousTag := ""
+			if i+1 < len(tags) {
+				previousTag = tags[i+1].Name
+			}
+
+			commits, err := git.Log(previousTag, tag.Name)
+			if err != nil {
+				return fmt.Errorf("error getting git log from tag: %s, message: %v", tag.Name, err)
+			}
+
+			currentVer, err := sv.ToVersion(tag.Name)
+			if err != nil {
+				return fmt.Errorf("error parsing version: %s from describe, message: %v", tag.Name, err)
+			}
+			releaseNotes = append(releaseNotes, rnProcessor.Create(currentVer, tag.Date, commits))
+		}
+
+		fmt.Println(formatter.FormatChangelog(releaseNotes))
+
+		return nil
+	}
+}

cmd/git-sv/main.go

@@ -17,6 +17,7 @@ func main() {
 	git := sv.NewGit(cfg.BreakingChangePrefixes, cfg.IssueIDPrefixes, cfg.TagPattern)
 	semverProcessor := sv.NewSemVerCommitsProcessor(cfg.IncludeUnknownTypeAsPatch, cfg.MajorVersionTypes, cfg.MinorVersionTypes, cfg.PatchVersionTypes)
 	releasenotesProcessor := sv.NewReleaseNoteProcessor(cfg.ReleaseNotesTags)
+	outputFormatter := sv.NewOutputFormatter()
 
 	app := cli.NewApp()
 	app.Name = "sv"
@@ -40,20 +41,30 @@ func main() {
 			Aliases: []string{"cl"},
 			Usage:   "list all commit logs since last version as jsons",
 			Action:  commitLogHandler(git, semverProcessor),
-			Flags:   []cli.Flag{&cli.StringFlag{Name: "t", Usage: "get commit log from tag"}},
+			Flags:   []cli.Flag{&cli.StringFlag{Name: "t", Aliases: []string{"tag"}, Usage: "get commit log from tag"}},
 		},
 		{
 			Name:    "release-notes",
 			Aliases: []string{"rn"},
 			Usage:   "generate release notes",
-			Action:  releaseNotesHandler(git, semverProcessor, releasenotesProcessor),
-			Flags:   []cli.Flag{&cli.StringFlag{Name: "t", Usage: "get release note from tag"}},
+			Action:  releaseNotesHandler(git, semverProcessor, releasenotesProcessor, outputFormatter),
+			Flags:   []cli.Flag{&cli.StringFlag{Name: "t", Aliases: []string{"tag"}, Usage: "get release note from tag"}},
+		},
+		{
+			Name:    "changelog",
+			Aliases: []string{"cgl"},
+			Usage:   "generate changelog",
+			Action:  changelogHandler(git, semverProcessor, releasenotesProcessor, outputFormatter),
+			Flags: []cli.Flag{
+				&cli.IntFlag{Name: "size", Value: 10, Aliases: []string{"n"}, Usage: "get changelog from last 'n' tags"},
+				&cli.BoolFlag{Name: "all", Usage: "ignore size parameter, get changelog for every tag"},
+			},
 		},
 		{
 			Name:    "tag",
 			Aliases: []string{"tg"},
 			Usage:   "generate tag with version based on git commit messages",
-			Action:  tagHandler(git, semverProcessor, releasenotesProcessor),
+			Action:  tagHandler(git, semverProcessor),
 		},
 	}
 

sv/formatter.go

@@ -0,0 +1,98 @@
+package sv
+
+import (
+	"bytes"
+	"fmt"
+	"text/template"
+)
+
+type releaseNoteTemplateVariables struct {
+	Version         string
+	Date            string
+	Sections        map[string]ReleaseNoteSection
+	BreakingChanges []string
+}
+
+const (
+	cglTemplate = `# Changelog
+{{- range .}}
+
+{{template "rnTemplate" .}}
+---
+{{- end}}
+`
+
+	rnSectionItem = "- {{if .Scope}}**{{.Scope}}:** {{end}}{{.Subject}} ({{.Hash}}){{if .Metadata.issueid}} ({{.Metadata.issueid}}){{end}}"
+
+	rnSection = `{{- if .}}
+
+### {{.Name}}
+{{range $k,$v := .Items}}
+{{template "rnSectionItem" $v}}
+{{- end}}
+{{- end}}`
+
+	rnSectionBreakingChanges = `{{- if .}}
+
+### Breaking Changes
+{{range $k,$v := .}}
+- {{$v}}
+{{- end}}
+{{- end}}`
+
+	rnTemplate = `## v{{.Version}} ({{.Date}})
+{{- template "rnSection" .Sections.feat}}
+{{- template "rnSection" .Sections.fix}}
+{{- template "rnSectionBreakingChanges" .BreakingChanges}}
+`
+)
+
+// OutputFormatter output formatter interface.
+type OutputFormatter interface {
+	FormatReleaseNote(releasenote ReleaseNote) string
+	FormatChangelog(releasenotes []ReleaseNote) string
+}
+
+// OutputFormatterImpl formater for release note and changelog.
+type OutputFormatterImpl struct {
+	releasenoteTemplate *template.Template
+	changelogTemplate   *template.Template
+}
+
+// NewOutputFormatter TemplateProcessor constructor.
+func NewOutputFormatter() *OutputFormatterImpl {
+	cgl := template.Must(template.New("cglTemplate").Parse(cglTemplate))
+	rn := template.Must(cgl.New("rnTemplate").Parse(rnTemplate))
+	template.Must(rn.New("rnSectionItem").Parse(rnSectionItem))
+	template.Must(rn.New("rnSection").Parse(rnSection))
+	template.Must(rn.New("rnSectionBreakingChanges").Parse(rnSectionBreakingChanges))
+	return &OutputFormatterImpl{releasenoteTemplate: rn, changelogTemplate: cgl}
+}
+
+// FormatReleaseNote format a release note.
+func (p OutputFormatterImpl) FormatReleaseNote(releasenote ReleaseNote) string {
+	var b bytes.Buffer
+	p.releasenoteTemplate.Execute(&b, releaseNoteVariables(releasenote))
+	return b.String()
+}
+
+// FormatChangelog format a changelog
+func (p OutputFormatterImpl) FormatChangelog(releasenotes []ReleaseNote) string {
+	var templateVars []releaseNoteTemplateVariables
+	for _, v := range releasenotes {
+		templateVars = append(templateVars, releaseNoteVariables(v))
+	}
+
+	var b bytes.Buffer
+	p.changelogTemplate.Execute(&b, templateVars)
+	return b.String()
+}
+
+func releaseNoteVariables(releasenote ReleaseNote) releaseNoteTemplateVariables {
+	return releaseNoteTemplateVariables{
+		Version:         fmt.Sprintf("%d.%d.%d", releasenote.Version.Major(), releasenote.Version.Minor(), releasenote.Version.Patch()),
+		Date:            releasenote.Date.Format("2006-01-02"),
+		Sections:        releasenote.Sections,
+		BreakingChanges: releasenote.BreakingChanges,
+	}
+}

sv/git.go

@@ -15,8 +15,11 @@ import (
 const (
 	logSeparator = "##"
 	endLine      = "~~"
-	breakingChangesKey = "breakingchange"
-	issueIDKey         = "issueid"
+
+	// BreakingChangesKey key to breaking change metadata
+	BreakingChangesKey = "breakingchange"
+	// IssueIDKey key to issue id metadata
+	IssueIDKey = "issueid"
 )
 
 // Git commands
@@ -52,7 +55,7 @@ type GitImpl struct {
 // NewGit constructor
 func NewGit(breakinChangePrefixes, issueIDPrefixes []string, tagPattern string) *GitImpl {
 	return &GitImpl{
-		messageMetadata: map[string][]string{breakingChangesKey: breakinChangePrefixes, issueIDKey: issueIDPrefixes},
+		messageMetadata: map[string][]string{BreakingChangesKey: breakinChangePrefixes, IssueIDKey: issueIDPrefixes},
 		tagPattern:      tagPattern,
 	}
 }

sv/helpers_test.go

@@ -19,15 +19,16 @@ func commitlog(t string, metadata map[string]string) GitCommitLog {
 	}
 }
 
-func releaseNote(date time.Time, sections map[string]ReleaseNoteSection, breakingChanges []string) ReleaseNote {
+func releaseNote(version semver.Version, date time.Time, sections map[string]ReleaseNoteSection, breakingChanges []string) ReleaseNote {
 	return ReleaseNote{
+		Version:         version,
 		Date:            date.Truncate(time.Minute),
 		Sections:        sections,
 		BreakingChanges: breakingChanges,
 	}
 }
 
-func rnSection(name string, items []GitCommitLog) ReleaseNoteSection {
+func newReleaseNoteSection(name string, items []GitCommitLog) ReleaseNoteSection {
 	return ReleaseNoteSection{
 		Name:  name,
 		Items: items,

sv/releasenotes.go

@@ -1,56 +1,28 @@
 package sv
 
 import (
-	"bytes"
-	"fmt"
-	"text/template"
 	"time"
 
 	"github.com/Masterminds/semver"
 )
 
-type releaseNoteTemplate struct {
-	Version         string
-	Date            string
-	Sections        map[string]ReleaseNoteSection
-	BreakingChanges []string
-}
-
-const markdownTemplate = `## v{{.Version}} ({{.Date}})
-
-{{if .Sections.feat}}### {{.Sections.feat.Name}}
-{{range $k,$v := .Sections.feat.Items}}
-- {{if $v.Scope}}**{{$v.Scope}}:** {{end}}{{$v.Subject}} ({{$v.Hash}}) {{if $v.Metadata.issueid}}({{$v.Metadata.issueid}}){{end}}{{end}}{{end}}
-
-{{if .Sections.fix}}### {{.Sections.fix.Name}}
-{{range $k,$v := .Sections.fix.Items}}
-- {{if $v.Scope}}**{{$v.Scope}}:** {{end}}{{$v.Subject}} ({{$v.Hash}}) {{if $v.Metadata.issueid}}({{$v.Metadata.issueid}}){{end}}{{end}}{{end}}
-
-{{if .BreakingChanges}}### Breaking Changes
-{{range $k,$v := .BreakingChanges}}
-- {{$v}}{{end}}
-{{end}}`
-
 // ReleaseNoteProcessor release note processor interface.
 type ReleaseNoteProcessor interface {
-	Get(date time.Time, commits []GitCommitLog) ReleaseNote
-	Format(releasenote ReleaseNote, version semver.Version) string
+	Create(version semver.Version, date time.Time, commits []GitCommitLog) ReleaseNote
 }
 
 // ReleaseNoteProcessorImpl release note based on commit log.
 type ReleaseNoteProcessorImpl struct {
 	tags map[string]string
-	template *template.Template
 }
 
 // NewReleaseNoteProcessor ReleaseNoteProcessor constructor.
 func NewReleaseNoteProcessor(tags map[string]string) *ReleaseNoteProcessorImpl {
-	template := template.Must(template.New("markdown").Parse(markdownTemplate))
-	return &ReleaseNoteProcessorImpl{tags: tags, template: template}
+	return &ReleaseNoteProcessorImpl{tags: tags}
 }
 
-// Get generate a release note based on commits.
-func (p ReleaseNoteProcessorImpl) Get(date time.Time, commits []GitCommitLog) ReleaseNote {
+// Create create a release note based on commits.
+func (p ReleaseNoteProcessorImpl) Create(version semver.Version, date time.Time, commits []GitCommitLog) ReleaseNote {
 	sections := make(map[string]ReleaseNoteSection)
 	var breakingChanges []string
 	for _, commit := range commits {
@@ -62,30 +34,17 @@ func (p ReleaseNoteProcessorImpl) Get(date time.Time, commits []GitCommitLog) Re
 			section.Items = append(section.Items, commit)
 			sections[commit.Type] = section
 		}
-		if value, exists := commit.Metadata[BreakingChangeTag]; exists {
+		if value, exists := commit.Metadata[BreakingChangesKey]; exists {
 			breakingChanges = append(breakingChanges, value)
 		}
 	}
 
-	return ReleaseNote{Date: date.Truncate(time.Minute), Sections: sections, BreakingChanges: breakingChanges}
-}
-
-// Format format a release note.
-func (p ReleaseNoteProcessorImpl) Format(releasenote ReleaseNote, version semver.Version) string {
-	templateVars := releaseNoteTemplate{
-		Version:         fmt.Sprintf("%d.%d.%d", version.Major(), version.Minor(), version.Patch()),
-		Date:            releasenote.Date.Format("2006-01-02"),
-		Sections:        releasenote.Sections,
-		BreakingChanges: releasenote.BreakingChanges,
-	}
-
-	var b bytes.Buffer
-	p.template.Execute(&b, templateVars)
-	return b.String()
+	return ReleaseNote{Version: version, Date: date.Truncate(time.Minute), Sections: sections, BreakingChanges: breakingChanges}
 }
 
 // ReleaseNote release note.
 type ReleaseNote struct {
+	Version         semver.Version
 	Date            time.Time
 	Sections        map[string]ReleaseNoteSection
 	BreakingChanges []string

sv/releasenotes_test.go

@@ -4,41 +4,47 @@ import (
 	"reflect"
 	"testing"
 	"time"
+
+	"github.com/Masterminds/semver"
 )
 
-func TestReleaseNoteProcessorImpl_Get(t *testing.T) {
+func TestReleaseNoteProcessorImpl_Create(t *testing.T) {
 	date := time.Now()
 
 	tests := []struct {
 		name    string
+		version semver.Version
 		date    time.Time
 		commits []GitCommitLog
 		want    ReleaseNote
 	}{
 		{
 			name:    "mapped tag",
+			version: *semver.MustParse("1.0.0"),
 			date:    date,
 			commits: []GitCommitLog{commitlog("t1", map[string]string{})},
-			want:    releaseNote(date, map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
+			want:    releaseNote(*semver.MustParse("1.0.0"), date, map[string]ReleaseNoteSection{"t1": newReleaseNoteSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
 		},
 		{
 			name:    "unmapped tag",
+			version: *semver.MustParse("1.0.0"),
 			date:    date,
 			commits: []GitCommitLog{commitlog("t1", map[string]string{}), commitlog("unmapped", map[string]string{})},
-			want:    releaseNote(date, map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
+			want:    releaseNote(*semver.MustParse("1.0.0"), date, map[string]ReleaseNoteSection{"t1": newReleaseNoteSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
 		},
 		{
 			name:    "breaking changes tag",
+			version: *semver.MustParse("1.0.0"),
 			date:    date,
 			commits: []GitCommitLog{commitlog("t1", map[string]string{}), commitlog("unmapped", map[string]string{"breakingchange": "breaks"})},
-			want:    releaseNote(date, map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, []string{"breaks"}),
+			want:    releaseNote(*semver.MustParse("1.0.0"), date, map[string]ReleaseNoteSection{"t1": newReleaseNoteSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, []string{"breaks"}),
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			p := NewReleaseNoteProcessor(map[string]string{"t1": "Tag 1", "t2": "Tag 2"})
-			if got := p.Get(tt.date, tt.commits); !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("ReleaseNoteProcessorImpl.Get() = %v, want %v", got, tt.want)
+			if got := p.Create(tt.version, tt.date, tt.commits); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("ReleaseNoteProcessorImpl.Create() = %v, want %v", got, tt.want)
 			}
 		})
 	}

sv/semver.go

@@ -24,9 +24,6 @@ func ToVersion(value string) (semver.Version, error) {
 	return *v, nil
 }
 
-// BreakingChangeTag breaking change tag from commit metadata
-const BreakingChangeTag string = "breakingchange"
-
 // SemVerCommitsProcessor interface
 type SemVerCommitsProcessor interface {
 	NextVersion(version semver.Version, commits []GitCommitLog) semver.Version
@@ -72,7 +69,7 @@ func (p SemVerCommitsProcessorImpl) NextVersion(version semver.Version, commits
 }
 
 func (p SemVerCommitsProcessorImpl) versionTypeToUpdate(commit GitCommitLog) versionType {
-	if _, exists := commit.Metadata[BreakingChangeTag]; exists {
+	if _, exists := commit.Metadata[BreakingChangesKey]; exists {
 		return major
 	}
 	if _, exists := p.MajorVersionTypes[commit.Type]; exists {