feat(golang-rewrite): BATS test fixes & latest command

* Get asdf info BATS tests working
* Create `versions.Installed` function
* Update `versions.Latest` to return single version
* Implement `latest` asdf command

cmd/cmd.go

@@ -60,6 +60,22 @@ func Execute(version string) {
 					return installCommand(logger, args.Get(0), args.Get(1))
 				},
 			},
+			{
+				Name: "latest",
+				Flags: []cli.Flag{
+					&cli.BoolFlag{
+						Name:  "all",
+						Usage: "Show latest version of all tools",
+					},
+				},
+				Action: func(cCtx *cli.Context) error {
+					tool := cCtx.Args().Get(0)
+					pattern := cCtx.Args().Get(1)
+					all := cCtx.Bool("all")
+
+					return latestCommand(logger, all, tool, pattern)
+				},
+			},
 			{
 				Name: "plugin",
 				Action: func(_ *cli.Context) error {
@@ -313,3 +329,72 @@ func parseInstallVersion(version string) (string, string) {
 
 	return version, ""
 }
+
+func latestCommand(logger *log.Logger, all bool, toolName, pattern string) (err error) {
+	conf, err := config.LoadConfig()
+	if err != nil {
+		logger.Printf("error loading config: %s", err)
+		return err
+	}
+
+	if !all {
+		err = latestForPlugin(conf, toolName, pattern, false)
+		if err != nil {
+			os.Exit(1)
+		}
+
+		return err
+	}
+
+	plugins, err := plugins.List(conf, false, false)
+	if err != nil {
+		logger.Printf("error loading plugin list: %s", err, false)
+		return err
+	}
+
+	var maybeErr error
+	// loop over all plugins and show latest for each one.
+	for _, plugin := range plugins {
+		maybeErr = latestForPlugin(conf, plugin.Name, "", true)
+		if maybeErr != nil {
+			err = maybeErr
+		}
+	}
+
+	if err != nil {
+		os.Exit(1)
+		return maybeErr
+	}
+	return nil
+}
+
+func latestForPlugin(conf config.Config, toolName, pattern string, showStatus bool) error {
+	// show single plugin
+	plugin := plugins.New(conf, toolName)
+	latest, err := versions.Latest(plugin, pattern)
+	if err != nil && err.Error() != "no latest version found" {
+		fmt.Printf("unable to load latest version: %s\n", err)
+		return err
+	}
+
+	if latest == "" {
+		err := fmt.Errorf("No compatible versions available (%s %s)", toolName, pattern)
+		fmt.Println(err.Error())
+		return err
+	}
+
+	if showStatus {
+		installed := versions.Installed(conf, plugin, latest)
+		fmt.Printf("%s\t%s\t%s\n", plugin.Name, latest, installedStatus(installed))
+	} else {
+		fmt.Printf("%s\n", latest)
+	}
+	return nil
+}
+
+func installedStatus(installed bool) string {
+	if installed {
+		return "installed"
+	}
+	return "missing"
+}

internal/versions/versions.go

@@ -23,7 +23,6 @@ const (
 	uninstallableVersionMsg = "uninstallable version: system"
 	dataDirDownloads        = "downloads"
 	dataDirInstalls         = "installs"
-	defaultQuery            = "[0-9]"
 	latestFilterRegex       = "(?i)(^Available versions:|-src|-dev|-latest|-stm|[-\\.]rc|-milestone|-alpha|-beta|[-\\.]pre|-next|(a|b|c)[0-9]+|snapshot|master)"
 	noLatestVersionErrMsg   = "no latest version found"
 )
@@ -98,16 +97,10 @@ func InstallVersion(conf config.Config, plugin plugins.Plugin, version string, p
 	}
 
 	if version == latestVersion {
-		versions, err := Latest(plugin, pattern)
+		version, err = Latest(plugin, pattern)
 		if err != nil {
 			return err
 		}
-
-		if len(versions) < 1 {
-			return errors.New(noLatestVersionErrMsg)
-		}
-
-		version = versions[0]
 	}
 
 	return InstallOneVersion(conf, plugin, version, stdOut, stdErr)
@@ -128,8 +121,7 @@ func InstallOneVersion(conf config.Config, plugin plugins.Plugin, version string
 	installDir := installPath(conf, plugin, version)
 	versionType, version := ParseString(version)
 
-	// Check if version already installed
-	if _, err = os.Stat(installDir); !os.IsNotExist(err) {
+	if Installed(conf, plugin, version) {
 		return fmt.Errorf("version %s of %s is already installed", version, plugin.Name)
 	}
 
@@ -177,41 +169,50 @@ func InstallOneVersion(conf config.Config, plugin plugins.Plugin, version string
 	return nil
 }
 
+// Installed checks if a specific version of a tool is installed
+func Installed(conf config.Config, plugin plugins.Plugin, version string) bool {
+	installDir := installPath(conf, plugin, version)
+
+	// Check if version already installed
+	_, err := os.Stat(installDir)
+	return !os.IsNotExist(err)
+}
+
 // Latest invokes the plugin's latest-stable callback if it exists and returns
 // the version it returns. If the callback is missing it invokes the list-all
 // callback and returns the last version matching the query, if a query is
 // provided.
-func Latest(plugin plugins.Plugin, query string) (versions []string, err error) {
-	if query == "" {
-		query = defaultQuery
-	}
-
+func Latest(plugin plugins.Plugin, query string) (version string, err error) {
 	var stdOut strings.Builder
 	var stdErr strings.Builder
 
 	err = plugin.RunCallback("latest-stable", []string{query}, map[string]string{}, &stdOut, &stdErr)
 	if err != nil {
 		if _, ok := err.(plugins.NoCallbackError); !ok {
-			return versions, err
+			return version, err
 		}
 
 		allVersions, err := AllVersionsFiltered(plugin, query)
 		if err != nil {
-			return versions, err
+			return version, err
 		}
 
-		versions = filterByRegex(allVersions, latestFilterRegex, false)
+		versions := filterOutByRegex(allVersions, latestFilterRegex)
 
 		if len(versions) < 1 {
-			return versions, nil
+			return version, errors.New(noLatestVersionErrMsg)
 		}
 
-		return []string{versions[len(versions)-1]}, nil
+		return versions[len(versions)-1], nil
 	}
 
 	// parse stdOut and return version
-	versions = parseVersions(stdOut.String())
-	return versions, nil
+	allVersions := parseVersions(stdOut.String())
+	versions := filterOutByRegex(allVersions, latestFilterRegex)
+	if len(versions) < 1 {
+		return version, errors.New(noLatestVersionErrMsg)
+	}
+	return versions[len(versions)-1], nil
 }
 
 // AllVersions returns a slice of all available versions for the tool managed by
@@ -238,13 +239,23 @@ func AllVersionsFiltered(plugin plugins.Plugin, query string) (versions []string
 		return versions, err
 	}
 
-	return filterByRegex(all, query, true), err
+	return filterByExactMatch(all, query), err
 }
 
-func filterByRegex(allVersions []string, pattern string, include bool) (versions []string) {
+func filterByExactMatch(allVersions []string, pattern string) (versions []string) {
+	for _, version := range allVersions {
+		if strings.HasPrefix(version, pattern) {
+			versions = append(versions, version)
+		}
+	}
+
+	return versions
+}
+
+func filterOutByRegex(allVersions []string, pattern string) (versions []string) {
 	for _, version := range allVersions {
 		match, _ := regexp.MatchString(pattern, version)
-		if match && include || !match && !include {
+		if !match {
 			versions = append(versions, version)
 		}
 	}

internal/versions/versions_test.go

@@ -263,6 +263,20 @@ func TestInstallOneVersion(t *testing.T) {
 	})
 }
 
+func TestInstalled(t *testing.T) {
+	conf, plugin := generateConfig(t)
+	stdout, stderr := buildOutputs()
+	err := InstallOneVersion(conf, plugin, "1.0.0", &stdout, &stderr)
+	assert.Nil(t, err)
+
+	t.Run("returns false when not installed", func(t *testing.T) {
+		assert.False(t, Installed(conf, plugin, "4.0.0"))
+	})
+	t.Run("returns true when installed", func(t *testing.T) {
+		assert.True(t, Installed(conf, plugin, "1.0.0"))
+	})
+}
+
 func TestLatest(t *testing.T) {
 	pluginName := "latest_test"
 	conf, _ := generateConfig(t)
@@ -276,27 +290,27 @@ func TestLatest(t *testing.T) {
 		assert.Nil(t, err)
 		plugin := plugins.New(conf, pluginName)
 
-		versions, err := Latest(plugin, "")
+		version, err := Latest(plugin, "")
 		assert.Nil(t, err)
-		assert.Equal(t, []string{"2.0.0"}, versions)
+		assert.Equal(t, "2.0.0", version)
 	})
 
 	t.Run("when given query matching no versions return empty slice of versions", func(t *testing.T) {
-		versions, err := Latest(plugin, "impossible-to-satisfy-query")
-		assert.Nil(t, err)
-		assert.Empty(t, versions)
+		version, err := Latest(plugin, "impossible-to-satisfy-query")
+		assert.Error(t, err, "no latest version found")
+		assert.Equal(t, version, "")
 	})
 
 	t.Run("when given no query returns latest version of plugin", func(t *testing.T) {
-		versions, err := Latest(plugin, "")
+		version, err := Latest(plugin, "")
 		assert.Nil(t, err)
-		assert.Equal(t, []string{"5.1.0"}, versions)
+		assert.Equal(t, "5.1.0", version)
 	})
 
 	t.Run("when given no query returns latest version of plugin", func(t *testing.T) {
-		versions, err := Latest(plugin, "^4")
+		version, err := Latest(plugin, "4")
 		assert.Nil(t, err)
-		assert.Equal(t, []string{"4.0.0"}, versions)
+		assert.Equal(t, "4.0.0", version)
 	})
 }
 

main_test.go

@@ -27,17 +27,17 @@ func TestBatsTests(t *testing.T) {
 	//  runBatsFile(t, dir, "help_command.bats")
 	//})
 
-	//t.Run("info_command", func(t *testing.T) {
-	//  runBatsFile(t, dir, "info_command.bats")
-	//})
+	t.Run("info_command", func(t *testing.T) {
+		runBatsFile(t, dir, "info_command.bats")
+	})
 
 	//t.Run("install_command", func(t *testing.T) {
 	//  runBatsFile(t, dir, "install_command.bats")
 	//})
 
-	//t.Run("latest_command", func(t *testing.T) {
-	//  runBatsFile(t, dir, "latest_command.bats")
-	//})
+	t.Run("latest_command", func(t *testing.T) {
+		runBatsFile(t, dir, "latest_command.bats")
+	})
 
 	//t.Run("list_command", func(t *testing.T) {
 	//  runBatsFile(t, dir, "list_command.bats")

test/latest_command.bats

@@ -50,7 +50,7 @@ teardown() {
 
 @test "[latest_command - dummy_legacy_plugin] No stable version should return an error" {
   run asdf latest legacy-dummy 3
-  [ -z "$output" ]
+  [ "No compatible versions available (legacy-dummy 3)" = "$output" ]
   [ "$status" -eq 1 ]
 }
 

test/test_helpers.bash

@@ -36,7 +36,9 @@ setup_asdf_dir() {
 install_mock_plugin() {
   local plugin_name=$1
   local location="${2:-$ASDF_DIR}"
-  cp -r "$BATS_TEST_DIRNAME/fixtures/dummy_plugin" "$location/plugins/$plugin_name"
+  plugin_dir="$location/plugins/$plugin_name"
+  cp -r "$BATS_TEST_DIRNAME/fixtures/dummy_plugin" "$plugin_dir"
+  init_git_repo "$plugin_dir"
 }
 
 install_mock_plugin_no_download() {
@@ -48,7 +50,9 @@ install_mock_plugin_no_download() {
 install_mock_legacy_plugin() {
   local plugin_name=$1
   local location="${2:-$ASDF_DIR}"
-  cp -r "$BATS_TEST_DIRNAME/fixtures/dummy_legacy_plugin" "$location/plugins/$plugin_name"
+  plugin_dir="$location/plugins/$plugin_name"
+  cp -r "$BATS_TEST_DIRNAME/fixtures/dummy_legacy_plugin" "$plugin_dir"
+  init_git_repo "$plugin_dir"
 }
 
 install_mock_broken_plugin() {
@@ -61,11 +65,17 @@ install_mock_plugin_repo() {
   local plugin_name=$1
   local location="${BASE_DIR}/repo-${plugin_name}"
   cp -r "$BATS_TEST_DIRNAME/fixtures/dummy_plugin" "${location}"
+  init_git_repo "${location}"
+}
+
+init_git_repo() {
+  location="$1"
   git -C "${location}" init -q
   git -C "${location}" config user.name "Test"
   git -C "${location}" config user.email "test@example.com"
   git -C "${location}" add -A
   git -C "${location}" commit -q -m "asdf ${plugin_name} plugin"
+  git -C "${location}" remote add origin "https://asdf-vm.com/fake-repo"
 }
 
 install_mock_plugin_version() {