test pulling private git repos using mod get command

Signed-off-by: Tihomir Jovicic <tihomir.jovicic.develop@gmail.com>

cmd/dagger/cmd/mod/file.go

@@ -22,7 +22,7 @@ type file struct {
 	require []*require
 }
 
-func readModFile(workspacePath string) (*file, error) {
+func readPath(workspacePath string) (*file, error) {
 	f, err := os.Open(path.Join(workspacePath, filePath))
 	if err != nil {
 		return nil, err
@@ -93,7 +93,7 @@ func nonEmptyLines(b []byte) []string {
 	return lines
 }
 
-func writeModFile(workspacePath string, f *file) error {
+func (f *file) write(workspacePath string) error {
 	return ioutil.WriteFile(path.Join(workspacePath, filePath), f.contents().Bytes(), 0600)
 }
 

cmd/dagger/cmd/mod/get.go

@@ -40,6 +40,12 @@ var getCmd = &cobra.Command{
 			Value: args,
 		})
 
+		// read mod file in the current dir
+		modFile, err := readPath(workspace.Path)
+		if err != nil {
+			lg.Fatal().Err(err).Msg("error loading module file")
+		}
+
 		// parse packages to install
 		var packages []*require
 		for _, arg := range args {
@@ -52,72 +58,81 @@ var getCmd = &cobra.Command{
 			packages = append(packages, p)
 		}
 
-		// read mod file in the current dir
-		modFile, err := readModFile(workspace.Path)
-		if err != nil {
-			lg.Fatal().Err(err).Msgf("error loading module file")
-		}
-
 		// download packages
 		for _, p := range packages {
-			if err := processRequire(workspace.Path, p, modFile); err != nil {
+			isNew, err := processRequire(workspace.Path, p, modFile)
+			if err != nil {
 				lg.Error().Err(err).Msg("error processing package")
 			}
+
+			if isNew {
+				lg.Info().Msgf("downloading %s:%v", p.repo, p.version)
+			}
 		}
 
 		// write to mod file in the current dir
-		if err = writeModFile(workspace.Path, modFile); err != nil {
+		if err = modFile.write(workspace.Path); err != nil {
 			lg.Error().Err(err).Msg("error writing to mod file")
 		}
 
+		lg.Info().Msg("checking for new versions...")
+
 		<-doneCh
 	},
 }
 
-func processRequire(workspacePath string, req *require, modFile *file) error {
+func processRequire(workspacePath string, req *require, modFile *file) (bool, error) {
+	var isNew bool
+
 	tmpPath := path.Join(workspacePath, tmpBasePath, req.repo)
 	if err := os.MkdirAll(tmpPath, 0755); err != nil {
-		return fmt.Errorf("error creating tmp dir for cloning package")
+		return false, fmt.Errorf("error creating tmp dir for cloning package")
 	}
 	defer os.RemoveAll(tmpPath)
 
+	// clone the repo
 	privateKeyFile := viper.GetString("private-key-file")
 	privateKeyPassword := viper.GetString("private-key-password")
 	r, err := clone(req, tmpPath, privateKeyFile, privateKeyPassword)
 	if err != nil {
-		return fmt.Errorf("error downloading package %s: %w", req, err)
+		return isNew, fmt.Errorf("error downloading package %s: %w", req, err)
 	}
 
 	existing := modFile.search(req)
 	destPath := path.Join(workspacePath, destBasePath)
 
-	// requirement is new, so we should move the files and add it to the module.cue
+	// requirement is new, so we should move the files and add it to the mod file
 	if existing == nil {
 		if err := move(req, tmpPath, destPath); err != nil {
-			return err
+			return isNew, err
 		}
 		modFile.require = append(modFile.require, req)
-		return nil
+		isNew = true
+		return isNew, nil
 	}
 
 	c, err := compareVersions(existing.version, req.version)
 	if err != nil {
-		return err
+		return isNew, err
 	}
 
 	// the existing requirement is newer so we skip installation
 	if c > 0 {
-		return nil
+		return isNew, nil
 	}
 
 	// the new requirement is newer so we checkout the cloned repo to that tag, change the version in the existing
 	// requirement and replace the code in the /pkg folder
 	existing.version = req.version
 	if err = r.checkout(req.version); err != nil {
-		return err
+		return isNew, err
 	}
+	if err = replace(req, tmpPath, destPath); err != nil {
+		return isNew, err
+	}
+	isNew = true
 
-	return replace(req, tmpPath, destPath)
+	return isNew, nil
 }
 
 func compareVersions(reqV1, reqV2 string) (int, error) {
@@ -138,7 +153,7 @@ func compareVersions(reqV1, reqV2 string) (int, error) {
 }
 
 func init() {
-	getCmd.Flags().String("private-key-file", "~/.ssh/id_rsa", "Private ssh key")
+	getCmd.Flags().String("private-key-file", "", "Private ssh key")
 	getCmd.Flags().String("private-key-password", "", "Private ssh key password")
 
 	if err := viper.BindPFlags(getCmd.Flags()); err != nil {

cmd/dagger/cmd/mod/repo.go

@@ -45,10 +45,16 @@ func clone(require *require, dir string, privateKeyFile, privateKeyPassword stri
 	}
 
 	if require.version == "" {
-		require.version, err = rr.latestTag()
+		latestTag, err := rr.latestTag()
 		if err != nil {
 			return nil, err
 		}
+
+		if latestTag == "" {
+			return nil, fmt.Errorf("no git tags found in the repo")
+		}
+
+		require.version = latestTag
 	}
 
 	if err := rr.checkout(require.version); err != nil {
@@ -114,5 +120,9 @@ func (r *repo) latestTag() (string, error) {
 
 	sort.Sort(version.Collection(versions))
 
+	if len(versions) == 0 {
+		return "", nil
+	}
+
 	return versions[len(versions)-1].Original(), nil
 }

cmd/dagger/cmd/mod/repo_test.go

@@ -8,8 +8,10 @@ import (
 
 func TestClone(t *testing.T) {
 	cases := []struct {
-		name    string
+		name               string
-		require require
+		require            require
+		privateKeyFile     string
+		privateKeyPassword string
 	}{
 		{
 			name: "resolving shorter hash version",
@@ -36,14 +38,14 @@ func TestClone(t *testing.T) {
 			},
 		},
 		{
-			name: "alpha.dagger.io",
+			name: "Dagger private test repo",
 			require: require{
-				cloneRepo: "github.com/dagger/dagger",
+				cloneRepo: "github.com/dagger/test",
 				clonePath: "",
-				version:   "",
+				version:   "v0.2",
-
-				repo: "alpha.dagger.io",
 			},
+			privateKeyFile:     "./test-ssh-keys/id_ed25519_test",
+			privateKeyPassword: "",
 		},
 	}
 
@@ -56,7 +58,7 @@ func TestClone(t *testing.T) {
 
 			defer os.Remove(tmpDir)
 
-			_, err = clone(&c.require, tmpDir, "", "")
+			_, err = clone(&c.require, tmpDir, c.privateKeyFile, c.privateKeyPassword)
 			if err != nil {
 				t.Error(err)
 			}

cmd/dagger/cmd/mod/test-ssh-keys/id_ed25519_test

@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACCpGsk8WLx7gXCXX1muGhKjlkqaqykF1X198WQMkBO2pwAAAKC5Ec8WuRHP
+FgAAAAtzc2gtZWQyNTUxOQAAACCpGsk8WLx7gXCXX1muGhKjlkqaqykF1X198WQMkBO2pw
+AAAEBXE9Uht+QHuyK7+yYcZFVWOJ3qkhUh/wn289nDKDPHKakayTxYvHuBcJdfWa4aEqOW
+SpqrKQXVfX3xZAyQE7anAAAAGnRpaG9taXIuam92aWNpY0B0b3B0YWwuY29tAQID
+-----END OPENSSH PRIVATE KEY-----

cmd/dagger/cmd/mod/test-ssh-keys/id_ed25519_test.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKkayTxYvHuBcJdfWa4aEqOWSpqrKQXVfX3xZAyQE7an tihomir.jovicic@toptal.com