vpm: addd a show command (#10186)

cmd/tools/vcreate.v

@@ -21,6 +21,10 @@ fn cerror(e string) {
 }
 
 fn check_name(name string) string {
+	if name.trim_space().len == 0 {
+		cerror('project name cannot be empty')
+		exit(1)
+	}
 	if name.is_title() {
 		mut cname := name.to_lower()
 		if cname.contains(' ') {
@@ -157,6 +161,7 @@ fn init_project() {
 	c.write_vmod(false)
 	c.write_main(false)
 	c.create_git_repo('')
+
 	println("Change your module's description in `v.mod`")
 }
 

cmd/tools/vpm.v

@@ -13,7 +13,7 @@ import v.vmod
 const (
 	default_vpm_server_urls   = ['https://vpm.vlang.io']
 	valid_vpm_commands        = ['help', 'search', 'install', 'update', 'upgrade', 'outdated',
-		'list', 'remove']
+		'list', 'remove', 'show']
 	excluded_dirs             = ['cache', 'vlib']
 	supported_vcs_systems     = ['git', 'hg']
 	supported_vcs_folders     = ['.git', '.hg']
@@ -91,6 +91,9 @@ fn main() {
 		'remove' {
 			vpm_remove(module_names)
 		}
+		'show' {
+			vpm_show(module_names)
+		}
 		else {
 			println('Error: you tried to run "v $vpm_command"')
 			println('... but the v package management tool vpm only knows about these commands:')
@@ -567,3 +570,43 @@ fn get_module_meta_info(name string) ?Mod {
 	}
 	return error(errors.join_lines())
 }
+
+fn vpm_show(module_names []string) {
+	installed_modules := get_installed_modules()
+	for module_name in module_names {
+		if module_name !in installed_modules {
+			module_meta_info := get_module_meta_info(module_name) or { continue }
+			print('
+Name: $module_meta_info.name
+Homepage: $module_meta_info.url
+Downloads: $module_meta_info.nr_downloads
+Installed: False
+--------
+				')
+			continue
+		}
+		path := os.join_path(os.vmodules_dir(), module_name)
+		mod := vmod.from_file(os.join_path(path, 'v.mod')) or { continue }
+		// console_output := [
+		// 	'Name: $mod.name',
+		// 	'Version: $mod.version',
+		// 	'Description: $mod.description',
+		// 	'Homepage: $mod.repo_url',
+		// 	'Author: $mod.author',
+		// 	'License: $mod.license',
+		// 	'Location: $path',
+		// 	'Requires: ${mod.dependencies.join(', ')}',
+		// ].join('\n')
+		// println('${console_output}\n--------\n')
+		print('Name: $mod.name
+Version: $mod.version
+Description: $mod.description
+Homepage: $mod.repo_url
+Author: $mod.author
+License: $mod.license
+Location: $path
+Requires: ${mod.dependencies.join(', ')}
+--------
+')
+	}
+}