tools: extend vpm to support specifying git version tags when install…

…ing modules (#19835)

cmd/tools/vpm/common.v

@@ -19,6 +19,7 @@ mut:
 	version           string // specifies the requested version.
 	install_path      string
 	is_installed      bool
+	is_external       bool
 	installed_version string
 }
 
@@ -48,22 +49,22 @@ fn parse_query(query []string) ([]Module, []Module) {
 	mut errors := 0
 	for m in query {
 		ident, version := m.rsplit_once('@') or { m, '' }
-		mut is_external := false
 		mut mod := if ident.starts_with('https://') {
-			is_external = true
 			name := get_name_from_url(ident) or {
 				vpm_error(err.msg())
 				errors++
 				continue
 			}
-			if !has_vmod(ident) {
+			install_path := os.real_path(os.join_path(settings.vmodules_path, name))
+			if !has_vmod(ident, install_path) {
 				errors++
 				continue
 			}
 			Module{
 				name: name
 				url: ident
-				install_path: os.real_path(os.join_path(settings.vmodules_path, name))
+				install_path: install_path
+				is_external: true
 			}
 		} else {
 			info := get_mod_vpm_info(ident) or {
@@ -85,7 +86,7 @@ fn parse_query(query []string) ([]Module, []Module) {
 			mod.is_installed = true
 			mod.installed_version = v.output.all_after_last('/').trim_space()
 		}
-		if is_external {
+		if mod.is_external {
 			external_modules << mod
 		} else {
 			vpm_modules << mod
@@ -97,7 +98,11 @@ fn parse_query(query []string) ([]Module, []Module) {
 	return vpm_modules, external_modules
 }
 
-fn has_vmod(url string) bool {
+fn has_vmod(url string, install_path string) bool {
+	if os.exists((os.join_path(install_path, 'v.mod'))) {
+		// Safe time fetchting the repo when the module is already installed and has a `v.mod`.
+		return true
+	}
 	head_branch := os.execute_opt('git ls-remote --symref ${url} HEAD') or {
 		vpm_error('failed to find git HEAD for `${url}`.', details: err.msg())
 		return false

cmd/tools/vpm/dependency_test.v

@@ -50,20 +50,20 @@ fn test_install_dependencies_in_module_dir() {
 	assert v_mod.dependencies == ['markdown', 'pcre', 'https://github.com/spytheman/vtray']
 	// Run `v install`
 	res := os.execute_or_exit('${v} install')
-	assert res.output.contains('Detected v.mod file inside the project directory. Using it...')
-	assert res.output.contains('Installing module `markdown`')
-	assert res.output.contains('Installing module `pcre`')
-	assert res.output.contains('Installing module `vtray`')
+	assert res.output.contains('Detected v.mod file inside the project directory. Using it...'), res.output
+	assert res.output.contains('Installing `markdown`'), res.output
+	assert res.output.contains('Installing `pcre`'), res.output
+	assert res.output.contains('Installing `vtray`'), res.output
 	assert get_mod_name(os.join_path(test_path, 'markdown', 'v.mod')) == 'markdown'
 	assert get_mod_name(os.join_path(test_path, 'pcre', 'v.mod')) == 'pcre'
 	assert get_mod_name(os.join_path(test_path, 'vtray', 'v.mod')) == 'vtray'
 }
 
 fn test_resolve_external_dependencies_during_module_install() {
 	res := os.execute_or_exit('${v} install https://github.com/ttytm/emoji-mart-desktop')
-	assert res.output.contains('Resolving 2 dependencies')
-	assert res.output.contains('Installing module `webview`')
-	assert res.output.contains('Installing module `miniaudio`')
+	assert res.output.contains('Resolving 2 dependencies'), res.output
+	assert res.output.contains('Installing `webview`'), res.output
+	assert res.output.contains('Installing `miniaudio`'), res.output
 	// The external dependencies should have been installed to `<vmodules_dir>/<dependency_name>`
 	assert get_mod_name(os.join_path(test_path, 'webview', 'v.mod')) == 'webview'
 	assert get_mod_name(os.join_path(test_path, 'miniaudio', 'v.mod')) == 'miniaudio'

cmd/tools/vpm/install.v

@@ -4,6 +4,12 @@ import os
 import v.vmod
 import v.help
 
+enum InstallResult {
+	installed
+	failed
+	skipped
+}
+
 fn vpm_install(query []string) {
 	if settings.is_help {
 		help.print_and_exit('vpm')
@@ -88,8 +94,8 @@ fn vpm_install_from_vpm(modules []Module) {
 		last_errors := errors
 		vcs := if m.vcs != '' {
 			supported_vcs[m.vcs] or {
-				errors++
 				vpm_error('skipping `${m.name}`, since it uses an unsupported version control system `${m.vcs}`.')
+				errors++
 				continue
 			}
 		} else {
@@ -100,18 +106,19 @@ fn vpm_install_from_vpm(modules []Module) {
 			errors++
 			continue
 		}
-		if os.exists(m.install_path) {
-			vpm_update([m.name])
-			continue
-		}
-		m.install(vcs) or {
-			errors++
-			vpm_error(err.msg())
-			continue
+		match m.install(vcs) {
+			.installed {}
+			.failed {
+				errors++
+				continue
+			}
+			.skipped {
+				continue
+			}
 		}
 		increment_module_download_count(m.name) or {
-			errors++
 			vpm_error('failed to increment the download count for `${m.name}`', details: err.msg())
+			errors++
 		}
 		if last_errors == errors {
 			println('Installed `${m.name}`.')
@@ -124,27 +131,27 @@ fn vpm_install_from_vpm(modules []Module) {
 }
 
 fn vpm_install_from_vcs(modules []Module) {
-	mut errors := 0
+	vpm_log(@FILE_LINE, @FN, 'modules: ${modules}')
 	vcs := supported_vcs[settings.vcs]
+	vcs.is_executable() or {
+		vpm_error(err.msg())
+		exit(1)
+	}
 	urls := modules.map(it.url)
+	mut errors := 0
 	for m in modules {
 		vpm_log(@FILE_LINE, @FN, 'module: ${m}')
 		last_errors := errors
-		if os.exists(m.install_path) {
-			vpm_update([m.name])
-			continue
-		}
-		vcs.is_executable() or {
-			vpm_error(err.msg())
-			errors++
-			continue
-		}
-		m.install(vcs) or {
-			errors++
-			vpm_error(err.msg())
-			continue
+		match m.install(vcs) {
+			.installed {}
+			.failed {
+				errors++
+				continue
+			}
+			.skipped {
+				continue
+			}
 		}
-		// Note: increment error count when v.mod becomes mandatory for external modules.
 		manifest := get_manifest(m.install_path) or { continue }
 		final_path := os.real_path(os.join_path(settings.vmodules_path, manifest.name.replace('-',
 			'_').to_lower()))
@@ -201,13 +208,57 @@ fn vpm_install_from_vcs(modules []Module) {
 	}
 }
 
-fn (m Module) install(vcs &VCS) ! {
-	cmd := '${vcs.cmd} ${vcs.args.install} "${m.url}" "${m.install_path}"'
+fn (m Module) install(vcs &VCS) InstallResult {
+	if m.is_installed {
+		// Case: installed, but not an explicit version. Update instead of continuing the installation.
+		if m.version == '' && m.installed_version == '' {
+			vpm_update([if m.is_external { m.url } else { m.name }])
+			return .skipped
+		}
+		// Case: installed, but conflicting. Confirmation or -[-f]orce flag required.
+		if settings.is_force || m.confirm_install() {
+			m.remove() or {
+				vpm_error('failed to remove `${m.name}`.', details: err.msg())
+				return .failed
+			}
+		} else {
+			return .skipped
+		}
+	}
+	install_arg := if m.version != '' {
+		'${vcs.args.install} --single-branch -b ${m.version}'
+	} else {
+		vcs.args.install
+	}
+	cmd := '${vcs.cmd} ${install_arg} "${m.url}" "${m.install_path}"'
 	vpm_log(@FILE_LINE, @FN, 'command: ${cmd}')
-	println('Installing module `${m.name}` from `${m.url}` to `${m.install_path}` ...')
-	os.execute_opt(cmd) or {
-		vpm_log(@FILE_LINE, @FN, 'cmd output: ${err}')
-		return error('failed to install module `${m.name}` to `${m.install_path}`.')
+	println('Installing `${m.name}`...')
+	verbose_println('  cloning from `${m.url}` to `${m.install_path}`')
+	res := os.execute_opt(cmd) or {
+		vpm_error('failed to install `${m.name}`.', details: err.msg())
+		return .failed
+	}
+	vpm_log(@FILE_LINE, @FN, 'cmd output: ${res.output}')
+	return .installed
+}
+
+fn (m Module) confirm_install() bool {
+	if m.installed_version == m.version {
+		println('Module `${m.name}${at_version(m.installed_version)}` is already installed, use --force to overwrite.')
+		return false
+	} else {
+		install_version := at_version(if m.version == '' { 'latest' } else { m.version })
+		println('Module `${m.name}${at_version(m.installed_version)}` is already installed at `${m.install_path}`.')
+		input := os.input('Replace it with `${m.name}${install_version}`? [Y/n]: ')
+		match input.to_lower() {
+			'', 'y' {
+				return true
+			}
+			else {
+				verbose_println('Skipping `${m.name}`.')
+				return false
+			}
+		}
 	}
 }
 
@@ -220,3 +271,7 @@ fn (m Module) remove() ! {
 	}
 	verbose_println('Removed `${m.name}`.')
 }
+
+fn at_version(version string) string {
+	return if version != '' { '@${version}' } else { '' }
+}

cmd/tools/vpm/install_test.v

@@ -24,7 +24,7 @@ fn testsuite_end() {
 
 fn test_install_from_vpm_ident() {
 	res := os.execute_or_exit('${v} install nedpals.args')
-	assert res.output.contains('Skipping download count increment for `nedpals.args`.')
+	assert res.output.contains('Skipping download count increment for `nedpals.args`.'), res.output
 	mod := vmod.from_file(os.join_path(test_path, 'nedpals', 'args', 'v.mod')) or {
 		assert false, err.msg()
 		return
@@ -45,7 +45,7 @@ fn test_install_from_vpm_short_ident() {
 
 fn test_install_from_git_url() {
 	res := os.execute_or_exit('${v} install https://github.com/vlang/markdown')
-	assert res.output.contains('Installing module `markdown` from `https://github.com/vlang/markdown`')
+	assert res.output.contains('Installing `markdown`'), res.output
 	mod := vmod.from_file(os.join_path(test_path, 'markdown', 'v.mod')) or {
 		assert false, err.msg()
 		return
@@ -86,7 +86,7 @@ fn test_install_once() {
 	install_cmd := '${@VEXE} install https://github.com/vlang/markdown https://github.com/vlang/pcre --once -v'
 	// Try installing two modules, one of which is already installed.
 	mut res := os.execute_or_exit(install_cmd)
-	assert res.output.contains("Already installed modules: ['markdown']")
+	assert res.output.contains("Already installed modules: ['markdown']"), res.output
 	mod := vmod.from_file(os.join_path(test_path, 'pcre', 'v.mod')) or {
 		assert false, err.msg()
 		return
@@ -99,7 +99,7 @@ fn test_install_once() {
 
 	// Try installing two modules that are both already installed.
 	res = os.execute_or_exit(install_cmd)
-	assert res.output.contains('All modules are already installed.')
+	assert res.output.contains('All modules are already installed.'), res.output
 	assert md_last_modified == os.file_last_mod_unix(os.join_path(test_path, 'markdown',
 		'v.mod'))
 }
@@ -108,13 +108,13 @@ fn test_missing_repo_name_in_url() {
 	incomplete_url := 'https://github.com/vlang'
 	res := os.execute('${v} install ${incomplete_url}')
 	assert res.exit_code == 1
-	assert res.output.contains('failed to retrieve module name for `${incomplete_url}`')
+	assert res.output.contains('failed to retrieve module name for `${incomplete_url}`'), res.output
 }
 
 fn test_missing_vmod_in_url() {
-	assert has_vmod('https://github.com/vlang/v') // head branch == `master`.
-	assert has_vmod('https://github.com/v-analyzer/v-analyzer') // head branch == `main`.
-	assert !has_vmod('https://github.com/octocat/octocat.github.io') // not a V module.
+	assert has_vmod('https://github.com/vlang/v', '') // head branch == `master`.
+	assert has_vmod('https://github.com/v-analyzer/v-analyzer', '') // head branch == `main`.
+	assert !has_vmod('https://github.com/octocat/octocat.github.io', '') // not a V module.
 	res := os.execute('${v} install https://github.com/octocat/octocat.github.io')
 	assert res.exit_code == 1
 	assert res.output.contains('failed to find `v.mod` for `https://github.com/octocat/octocat.github.io`'), res.output