extra: support install/remove from local sources (#320)

* utils: adjust `similarity`, add suggestions from `subcmds`

android/env/env.v

@@ -320,6 +320,44 @@ pub fn install(components string, verbosity int) int {
 	return 0
 }
 
+// remove_components removess various external components installed by `install_components`
+// These components can be (TODO: Android SDK components or) extra commands.
+pub fn remove_components(arguments []string, verbosity int) ! {
+	if arguments.len == 0 {
+		return error('${@FN} requires at least one argument')
+	}
+
+	mut args := arguments.clone()
+	if args[0] == 'remove' {
+		args = args[1..].clone() // skip `remove` part
+	}
+	if args.len == 0 {
+		return error('${@FN} requires an argument')
+	}
+
+	components := args[0]
+	// vab remove extra ...
+	if components == 'extra' {
+		if args.len == 1 {
+			return error('${@FN} extra requires an argument')
+		}
+		extra.remove_command(input: args[1..].clone(), verbosity: verbosity) or {
+			return error('Removing of command failed: ${err}')
+		}
+		if verbosity > 0 {
+			println('Removed successfully')
+		}
+		return
+	}
+
+	// TODO: vab remove "x;y;z,i;j;k" (sdkmanager compatible tuple)
+	// Allows to specify a string list of things to remove
+	return error('${@FN} TODO: currently `remove` only supports removing extra commands via `vab remove extra ...`')
+	// if verbosity > 0 {
+	// 	println('Removed successfully')
+	// }
+}
+
 // install_components installs various external components that vab can use.
 // These components can be Android SDK components or extra commands.
 pub fn install_components(arguments []string, verbosity int) ! {

cli/cli.v

@@ -30,15 +30,17 @@ Sub-commands:
   doctor                    Display useful info about your system,
                             (useful for bug reports)
   install                   Install various components. Example:
-                            `vab install "platforms;android-21"'
+                            `vab install "platforms;android-21"
+  remove                    Remove various components. Example:
+                            `vab remove extra github:larpon/vab-sdl'
 
 pub const exe_git_hash = vab_commit_hash()
 pub const work_directory = paths.tmp_work()
 pub const cache_directory = paths.cache()
 pub const rip_vflags = ['-autofree', '-gc', '-g', '-cg', '-prod', 'run', '-showcc', '-skip-unused',
 	'-no-bounds-checking'] // NOTE this can be removed when the deprecated `cli.args_to_options()` is removed
 pub const subcmds = ['complete', 'test-all', 'test-cleancode', 'test-runtime']
-pub const subcmds_builtin = ['doctor', 'install']
+pub const subcmds_builtin = ['doctor', 'install', 'remove']
 pub const accepted_input_files = ['.v', '.apk', '.aab']
 
 pub const vab_env_vars = [

cli/utils.v

@@ -53,10 +53,22 @@ pub fn input_suggestions(input string) []string {
 	$if vab_allow_extra_commands ? {
 		for extra_alias in extra.installed_aliases() {
 			similarity := f32(int(strings.levenshtein_distance_percentage(input, extra_alias) * 1000)) / 1000
-			if similarity > 0.25 {
+			if similarity > 30 {
 				suggests << extra_alias
 			}
 		}
 	}
+	for builtin_command in subcmds_builtin {
+		similarity := f32(int(strings.levenshtein_distance_percentage(input, builtin_command) * 1000)) / 1000
+		if similarity > 30 {
+			suggests << builtin_command
+		}
+	}
+	for sub_command in subcmds {
+		similarity := f32(int(strings.levenshtein_distance_percentage(input, sub_command) * 1000)) / 1000
+		if similarity > 30 {
+			suggests << sub_command
+		}
+	}
 	return suggests
 }