Feature/deb package changes

deb/deb.go

@@ -773,7 +773,11 @@ type controlData struct {
 }
 
 func writeControl(w io.Writer, data controlData) error {
-	tmpl := template.New("control")
+	return writeTemplate("control", controlTemplate, w, data)
+}
+
+func writeTemplate(name, t string, w io.Writer, data interface{}) error {
+	tmpl := template.New(name)
 	tmpl.Funcs(template.FuncMap{
 		"join": func(strs []string) string {
 			return strings.Trim(strings.Join(strs, ", "), " ")
@@ -806,5 +810,5 @@ func writeControl(w io.Writer, data controlData) error {
 			return result
 		},
 	})
-	return template.Must(tmpl.Parse(controlTemplate)).Execute(w, data)
+	return template.Must(tmpl.Parse(t)).Execute(w, data)
 }

deb/deb_meta.go

@@ -0,0 +1,161 @@
+package deb
+
+import (
+	"bytes"
+	"crypto/md5"
+	"crypto/sha1"
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/goreleaser/nfpm/v2"
+	"github.com/goreleaser/nfpm/v2/internal/sign"
+)
+
+const debChangesTemplate = `
+{{- /* Mandatory fields */ -}}
+Format: 1.8
+Date: {{.Date}}
+Source: {{.Info.Name}}
+Binary: {{.Info.Deb.Metadata.Binary}}
+Architecture: {{ if ne .Info.Platform "linux"}}{{ .Info.Platform }}-{{ end }}{{.Info.Arch}}
+Version: {{ if .Info.Epoch}}{{ .Info.Epoch }}:{{ end }}{{.Info.Version}}
+         {{- if .Info.Prerelease}}~{{ .Info.Prerelease }}{{- end }}
+         {{- if .Info.VersionMetadata}}+{{ .Info.VersionMetadata }}{{- end }}
+         {{- if .Info.Release}}-{{ .Info.Release }}{{- end }}
+Distribution: {{.Info.Deb.Metadata.Distribution}}
+{{- if .Info.Deb.Metadata.Urgency }}
+Urgency: {{.Info.Deb.Metadata.Urgency}}
+{{- end }}
+Maintainer: {{.Info.Maintainer}}
+{{- if .Info.Deb.Metadata.ChangedBy }}
+Changed-By: {{.Info.Deb.Metadata.ChangedBy}}
+{{- end }}
+Description: {{ multiline .Info.Description }}
+{{- range $key, $value := .Info.Deb.Metadata.Fields }}
+{{- if $value }}
+{{$key}}: {{$value}}
+{{- end }}
+{{- end }}
+Changes:
+{{range .Changes}} {{.}}{{end}}
+Checksums-Sha256:
+{{range .Files}} {{ .Sha256Sum }} {{.Size}} {{.Name}}{{end}}
+Checksums-Sha1:
+{{range .Files}} {{ .Sha1Sum }} {{.Size}} {{.Name}}{{end}}
+Files:
+{{range .Files}} {{ .Md5Sum }} {{.Size}} {{.Section}} {{.Priority}} {{.Name}}{{end}}
+
+`
+
+type changesData struct {
+	Date    string
+	Info    *nfpm.Info
+	Changes []string
+	Files   []changesFileData
+}
+
+type changesFileData struct {
+	Name      string
+	Size      int
+	Section   string
+	Priority  string
+	Md5Sum    string
+	Sha1Sum   string
+	Sha256Sum string
+}
+
+var now = time.Now
+
+func (d *Deb) ConventionalMetadataFileName(info *nfpm.Info) string {
+	target := info.Target
+
+	if target == "" {
+		target = d.ConventionalFileName(info)
+	}
+
+	return strings.Replace(target, ".deb", ".changes", 1)
+}
+
+func (d *Deb) PackageMetadata(metaInfo *nfpm.MetaInfo, w io.Writer) error {
+	data, err := createChanges(metaInfo)
+	if err != nil {
+		return err
+	}
+
+	if metaInfo.Info.Deb.Signature.KeyFile == "" {
+		_, err = w.Write(data.Bytes())
+		return err
+	}
+
+	signedData, err := signChanges(data, metaInfo.Info)
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write(signedData)
+	return err
+}
+
+func createChanges(info *nfpm.MetaInfo) (*bytes.Buffer, error) {
+	data, err := prepareChangesData(info)
+	if err != nil {
+		return nil, err
+	}
+
+	buf := new(bytes.Buffer)
+
+	if err := writeTemplate("changes", debChangesTemplate, buf, data); err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+func prepareChangesData(meta *nfpm.MetaInfo) (*changesData, error) {
+	info := meta.Info
+
+	_, err := meta.Package.Seek(0, io.SeekStart)
+	if err != nil {
+		return nil, err
+	}
+
+	buf := new(bytes.Buffer)
+
+	_, err = buf.ReadFrom(meta.Package)
+	if err != nil {
+		return nil, err
+	}
+
+	return &changesData{
+		Date: now().Format(time.RFC1123Z),
+		Info: info,
+		Changes: []string{
+			fmt.Sprintf("%s (%s) %s; urgency=%s\n  * Package created with nFPM",
+				info.Name, info.Version, info.Deb.Metadata.Distribution, info.Deb.Metadata.Urgency),
+		},
+		Files: []changesFileData{
+			{
+				Name:      filepath.Base(info.Target),
+				Size:      buf.Len(),
+				Section:   info.Section,
+				Priority:  info.Priority,
+				Md5Sum:    fmt.Sprintf("%x", md5.Sum(buf.Bytes())),
+				Sha1Sum:   fmt.Sprintf("%x", sha1.Sum(buf.Bytes())),
+				Sha256Sum: fmt.Sprintf("%x", sha256.Sum256(buf.Bytes())),
+			},
+		},
+	}, nil
+}
+
+func signChanges(data *bytes.Buffer, info *nfpm.Info) ([]byte, error) {
+	signConfig := info.Deb.Signature
+	signature, err := sign.PGPClearSignWithKeyID(data, signConfig.KeyFile, signConfig.KeyPassphrase, signConfig.KeyID)
+	if err != nil {
+		return nil, &nfpm.ErrSigningFailure{Err: err}
+	}
+	return signature, nil
+}

deb/deb_meta_test.go

@@ -0,0 +1,110 @@
+package deb
+
+import (
+	"bytes"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/goreleaser/nfpm/v2"
+	"github.com/goreleaser/nfpm/v2/internal/sign"
+	"github.com/stretchr/testify/require"
+)
+
+func fakeTime() time.Time {
+	t, _ := time.Parse(time.RFC1123Z, "Mon, 30 Jan 2023 08:36:31 +0300")
+	return t
+}
+
+func TestMetaFilename(t *testing.T) {
+	info := exampleInfo()
+
+	require.Equal(t, "foo_1.0.0_amd64.changes", Default.ConventionalMetadataFileName(info))
+}
+
+func TestMetaFilenameTarget(t *testing.T) {
+	info := exampleInfo()
+	info.Target = "bar_1.0.0_amd64.deb"
+
+	require.Equal(t, "bar_1.0.0_amd64.changes", Default.ConventionalMetadataFileName(info))
+}
+
+func TestMetaFields(t *testing.T) {
+	now = fakeTime
+
+	var w bytes.Buffer
+	pkg := bytes.NewReader([]byte{1, 2, 3})
+	info := nfpm.WithDefaults(&nfpm.Info{
+		Name:           "foo",
+		Description:    "Foo does things",
+		Priority:       "extra",
+		Maintainer:     "Carlos A Becker <pkg@carlosbecker.com>",
+		Version:        "v1.0.0",
+		Section:        "default",
+		Homepage:       "http://carlosbecker.com",
+		EnableMetadata: true,
+		Overridables: nfpm.Overridables{
+			Deb: nfpm.Deb{
+				Metadata: nfpm.DebMetadata{
+					Binary:       "foo",
+					Distribution: "unstable",
+					Urgency:      "medium",
+					ChangedBy:    "Carlos A Becker <pkg@carlosbecker.com>",
+					Fields: map[string]string{
+						"Bugs":  "https://github.com/goreleaser/nfpm/issues",
+						"Empty": "",
+					},
+				},
+			},
+		},
+	})
+	info.Target = Default.ConventionalFileName(info)
+
+	require.NoError(t, Default.PackageMetadata(&nfpm.MetaInfo{
+		Info:    info,
+		Package: pkg,
+	}, &w))
+	golden := "testdata/changes.golden"
+	if *update {
+		require.NoError(t, os.WriteFile(golden, w.Bytes(), 0o600))
+	}
+	bts, err := os.ReadFile(golden) //nolint:gosec
+	require.NoError(t, err)
+	require.Equal(t, string(bts), w.String())
+}
+
+func TestMetaSignature(t *testing.T) {
+	info := exampleInfo()
+	info.Target = Default.ConventionalFileName(info)
+	info.Deb.Signature.KeyFile = "../internal/sign/testdata/privkey.asc"
+	info.Deb.Signature.KeyPassphrase = "hunter2"
+
+	var w bytes.Buffer
+	pkg := bytes.NewReader([]byte{1, 2, 3})
+
+	require.NoError(t, Default.PackageMetadata(&nfpm.MetaInfo{
+		Info:    info,
+		Package: pkg,
+	}, &w))
+
+	_, err := sign.PGPReadMessage(w.Bytes(), "../internal/sign/testdata/pubkey.asc")
+	require.NoError(t, err)
+}
+
+func TestMetaSignatureError(t *testing.T) {
+	now = fakeTime
+	info := exampleInfo()
+	info.Target = Default.ConventionalFileName(info)
+	info.Deb.Signature.KeyFile = "/does/not/exist"
+
+	var w bytes.Buffer
+	pkg := bytes.NewReader([]byte{1, 2, 3})
+	err := Default.PackageMetadata(&nfpm.MetaInfo{
+		Info:    info,
+		Package: pkg,
+	}, &w)
+	require.Error(t, err)
+
+	var expectedError *nfpm.ErrSigningFailure
+	require.ErrorAs(t, err, &expectedError)
+}

deb/testdata/changes.golden

@@ -0,0 +1,22 @@
+Format: 1.8
+Date: Mon, 30 Jan 2023 08:36:31 +0300
+Source: foo
+Binary: foo
+Architecture: amd64
+Version: 1.0.0
+Distribution: unstable
+Urgency: medium
+Maintainer: Carlos A Becker <pkg@carlosbecker.com>
+Changed-By: Carlos A Becker <pkg@carlosbecker.com>
+Description: Foo does things
+Bugs: https://github.com/goreleaser/nfpm/issues
+Changes:
+ foo (1.0.0) unstable; urgency=medium
+  * Package created with nFPM
+Checksums-Sha256:
+ 039058c6f2c0cb492c533b0a4d14ef77cc0f78abccced5287d84a1a2011cfb81 3 foo_1.0.0_amd64.deb
+Checksums-Sha1:
+ 7037807198c22a7d2b0807371d763779a84fdfcf 3 foo_1.0.0_amd64.deb
+Files:
+ 5289df737df57326fcdd22597afb1fac 3 default extra foo_1.0.0_amd64.deb
+

internal/cmd/package.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"path"
 	"path/filepath"
@@ -113,5 +114,34 @@ func doPackage(configPath, target, packager string) error {
 	}
 
 	fmt.Printf("created package: %s\n", target)
+
+	meta, supports := pkg.(nfpm.PackagerWithMetadata)
+	if !supports || !info.EnableMetadata {
+		return nil
+	}
+
+	return doPackageMeta(meta, f, info)
+}
+
+func doPackageMeta(pkgMeta nfpm.PackagerWithMetadata, p io.ReadSeeker, info *nfpm.Info) error {
+	target := pkgMeta.ConventionalMetadataFileName(info)
+
+	f, err := os.Create(target)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	metaInfo := &nfpm.MetaInfo{
+		Info:    info,
+		Package: p,
+	}
+
+	if err := pkgMeta.PackageMetadata(metaInfo, f); err != nil {
+		_ = os.Remove(target)
+		return err
+	}
+
+	fmt.Printf("created package metadata: %s\n", target)
 	return f.Close()
 }