445 lines
10 KiB
V
445 lines
10 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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//
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// Utility functions helping integrate with various shell auto-completion systems.
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// The install process and communication is inspired from that of [kitty](https://sw.kovidgoyal.net/kitty/#completion-for-kitty)
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// This method avoids writing and maintaining external files on the user's file system.
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// The user will be responsible for adding a small line to their .*rc - that will ensure *live* (i.e. not-static)
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// auto-completion features.
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//
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// # bash
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// To install auto-completion for V in bash, simply add this code to your `~/.bashrc`:
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// `source /dev/stdin <<<"$(v complete setup bash)"`
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// On more recent versions of bash (>3.2) this should suffice:
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// `source <(v complete setup bash)`
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//
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// # fish
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// For versions of fish <3.0.0, add the following to your `~/.config/fish/config.fish`
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// `v complete setup fish | source`
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// Later versions of fish source completions by default.
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//
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// # zsh
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// To install auto-completion for V in zsh - please add the following to your `~/.zshrc`:
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// ```
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// autoload -Uz compinit
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// compinit
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// # Completion for v
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// v complete setup zsh | source /dev/stdin
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// ```
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// Please note that you should let v load the zsh completions after the call to compinit
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//
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// # powershell
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// To install auto-complete for V in PowerShell, simply do this
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// `v complete setup powershell >> $PROFILE`
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// and reload profile
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// `& $PROFILE`
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// If `$PROFILE` didn't exist yet, create it before
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// `New-Item -Type File -Force $PROFILE`
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//
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module main
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import os
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const (
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auto_complete_shells = ['bash', 'fish', 'zsh', 'powershell'] // list of supported shells
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vexe = os.getenv('VEXE')
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)
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// Snooped from cmd/v/v.v, vlib/v/pref/pref.v
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const (
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auto_complete_commands = [
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/* simple_cmd */
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'fmt',
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'up',
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'vet',
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'self',
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'tracev',
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'symlink',
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'bin2v',
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'test',
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'test-fmt',
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'test-self',
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'test-cleancode',
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'repl',
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'complete',
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'build-tools',
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'build-examples',
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'build-vbinaries',
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'setup-freetype',
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'doc',
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'doctor',
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/* commands */
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'help',
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'new',
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'init',
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'complete',
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'translate',
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'self',
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'search',
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'install',
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'update',
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'upgrade',
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'outdated',
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'list',
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'remove',
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'vlib-docs',
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'get',
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'version',
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'run',
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'build',
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'build-module',
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]
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auto_complete_flags = [
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'-apk',
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'-show-timings',
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'-check-syntax',
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'-v',
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'-progress',
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'-silent',
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'-g',
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'-cg',
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'-repl',
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'-live',
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'-sharedlive',
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'-shared',
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'--enable-globals',
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'-enable-globals',
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'-autofree',
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'-compress',
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'-freestanding',
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'-no-preludes',
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'-prof',
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'-profile',
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'-profile-no-inline',
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'-prod',
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'-simulator',
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'-stats',
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'-obfuscate',
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'-translated',
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'-color',
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'-nocolor',
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'-showcc',
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'-show-c-output',
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'-experimental',
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'-usecache',
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'-prealloc',
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'-parallel',
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'-x64',
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'-W',
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'-keepc',
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'-w',
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'-print_v_files',
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'-error-limit',
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'-os',
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'-printfn',
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'-cflags',
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'-define',
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'-d',
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'-cc',
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'-o',
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'-b',
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'-path',
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'-custom-prelude',
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'-name',
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'-bundle',
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'-V',
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'-version',
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'--version',
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]
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auto_complete_flags_doc = [
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'-all',
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'-f',
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'-h',
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'-help',
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'-m',
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'-o',
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'-readme',
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'-v',
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'-filename',
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'-pos',
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'-no-timestamp',
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'-inline-assets',
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'-open',
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'-p',
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'-s',
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'-l',
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]
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auto_complete_flags_fmt = [
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'-c',
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'-diff',
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'-l',
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'-w',
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'-debug',
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'-verify',
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]
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auto_complete_flags_bin2v = [
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'-h',
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'--help',
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'-m',
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'--module',
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'-p',
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'--prefix',
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'-w',
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'--write',
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]
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auto_complete_flags_self = [
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'-prod',
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]
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auto_complete_compilers = [
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'cc',
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'gcc',
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'tcc',
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'tinyc',
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'clang',
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'mingw',
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'msvc',
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]
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)
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// auto_complete prints auto completion results back to the calling shell's completion system.
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// auto_complete acts as communication bridge between the calling shell and V's completions.
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fn auto_complete(args []string) {
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if args.len <= 1 || args[0] != 'complete' {
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if args.len == 1 {
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eprintln('auto completion require arguments to work.')
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} else {
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eprintln('auto completion failed for "$args".')
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}
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exit(1)
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}
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sub := args[1]
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sub_args := args[1..]
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match sub {
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'setup' {
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if sub_args.len <= 1 || sub_args[1] !in auto_complete_shells {
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eprintln('please specify a shell to setup auto completion for ($auto_complete_shells).')
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exit(1)
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}
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shell := sub_args[1]
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mut setup := ''
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match shell {
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'bash' { setup = '
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_v_completions() {
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local src
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local limit
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# Send all words up to the word the cursor is currently on
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let limit=1+\$COMP_CWORD
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src=\$($vexe complete bash \$(printf "%s\\n" \${COMP_WORDS[@]: 0:\$limit}))
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if [[ \$? == 0 ]]; then
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eval \${src}
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#echo \${src}
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fi
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}
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complete -o nospace -F _v_completions v
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' }
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'fish' { setup = '
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function __v_completions
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# Send all words up to the one before the cursor
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$vexe complete fish (commandline -cop)
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end
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complete -f -c v -a "(__v_completions)"
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' }
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'zsh' { setup = '
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#compdef v
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_v() {
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local src
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# Send all words up to the word the cursor is currently on
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src=\$($vexe complete zsh \$(printf "%s\\n" \${(@)words[1,\$CURRENT]}))
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if [[ \$? == 0 ]]; then
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eval \${src}
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#echo \${src}
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fi
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}
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compdef _v v
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' }
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'powershell' { setup = '
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Register-ArgumentCompleter -Native -CommandName v -ScriptBlock {
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param(\$commandName, \$wordToComplete, \$cursorPosition)
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$vexe complete powershell "\$wordToComplete" | ForEach-Object {
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[System.Management.Automation.CompletionResult]::new(\$_, \$_, \'ParameterValue\', \$_)
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}
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}
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' }
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else {}
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}
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println(setup)
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}
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'bash' {
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if sub_args.len <= 1 {
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exit(0)
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}
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mut lines := []string{}
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list := auto_complete_request(sub_args[1..])
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for entry in list {
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lines << "COMPREPLY+=('$entry')"
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}
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println(lines.join('\n'))
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}
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'fish', 'powershell' {
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if sub_args.len <= 1 {
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exit(0)
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}
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mut lines := []string{}
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list := auto_complete_request(sub_args[1..])
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for entry in list {
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lines << '$entry'
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}
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println(lines.join('\n'))
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}
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'zsh' {
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if sub_args.len <= 1 {
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exit(0)
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}
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mut lines := []string{}
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list := auto_complete_request(sub_args[1..])
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for entry in list {
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lines << 'compadd -U -S' + '""' + ' -- ' + "'$entry';"
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}
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println(lines.join('\n'))
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}
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else {}
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}
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exit(0)
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}
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// append_separator_if_dir is a utility function.that returns the input `path` appended an
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// OS dependant path separator if the `path` is a directory.
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fn append_separator_if_dir(path string) string {
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return if os.is_dir(path) && !path.ends_with(os.path_separator) {
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path + os.path_separator
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} else {
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path
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}
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}
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// auto_complete_request retuns a list of completions resolved from a full argument list.
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fn auto_complete_request(args []string) []string {
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// Using space will ensure a uniform input in cases where the shell
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// returns the completion input as a string (['v','run'] vs. ['v run']).
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split_by := ' '
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request := args.join(split_by)
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mut list := []string{}
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// new_part := request.ends_with('\n\n')
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mut parts := request.trim_right(' ').split(split_by)
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if parts.len <= 1 { // 'v <tab>' -> top level commands.
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for command in auto_complete_commands {
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list << command
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}
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} else {
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part := parts.last().trim(' ')
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mut parent_command := ''
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for i := parts.len - 1; i >= 0; i-- {
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if parts[i].starts_with('-') {
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continue
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}
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parent_command = parts[i]
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break
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}
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get_flags := fn (base []string, flag string) []string {
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if flag.len == 1 { return base
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} else { return base.filter(it.starts_with(flag))
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}
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}
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if part.starts_with('-') { // 'v -<tab>' -> flags.
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match parent_command {
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'bin2v' { // 'v bin2v -<tab>'
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list = get_flags(auto_complete_flags_bin2v, part)
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}
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'build' { // 'v build -<tab>' -> flags.
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list = get_flags(auto_complete_flags, part)
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}
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'doc' { // 'v doc -<tab>' -> flags.
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list = get_flags(auto_complete_flags_doc, part)
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}
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'fmt' { // 'v fmt -<tab>' -> flags.
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list = get_flags(auto_complete_flags_fmt, part)
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}
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'self' { // 'v self -<tab>' -> flags.
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list = get_flags(auto_complete_flags_self, part)
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}
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else {
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for flag in auto_complete_flags {
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if flag == part {
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if flag == '-cc' { // 'v -cc <tab>' -> list of available compilers.
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for compiler in auto_complete_compilers {
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path := os.find_abs_path_of_executable(compiler) or { '' }
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if path != '' {
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list << compiler
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}
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}
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}
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} else if flag.starts_with(part) { // 'v -<char(s)><tab>' -> flags matching "<char(s)>".
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list << flag
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}
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}
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}
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}
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} else {
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match part {
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'help' { // 'v help <tab>' -> top level commands except "help".
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list = auto_complete_commands.filter(it != part && it != 'complete')
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}
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else {
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// 'v <char(s)><tab>' -> commands matching "<char(s)>".
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// Don't include if part matches a full command - instead go to path completion below.
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for command in auto_complete_commands {
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if part != command && command.starts_with(part) {
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list << command
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}
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}
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}
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}
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}
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// Nothing of value was found.
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// Mimic shell dir and file completion
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if list.len == 0 {
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mut ls_path := '.'
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mut collect_all := part in auto_complete_commands
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mut path_complete := false
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if part.ends_with(os.path_separator) || part == '.' || part == '..' {
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// 'v <command>(.*/$|.|..)<tab>' -> output full directory list
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ls_path = '.' + os.path_separator + part
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collect_all = true
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} else if !collect_all && part.contains(os.path_separator) && os.is_dir(os.dir(part)) {
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// 'v <command>(.*/.* && os.is_dir)<tab>' -> output completion friendly directory list
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ls_path = os.dir(part)
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path_complete = true
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}
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entries := os.ls(ls_path) or { return list }
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last := part.all_after_last(os.path_separator)
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if path_complete {
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path := part.all_before_last(os.path_separator)
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for entry in entries {
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if entry.starts_with(last) {
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list << append_separator_if_dir(os.join_path(path, entry))
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}
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}
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// If only one possible file - send full path to completion system.
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// Please note that this might be bash specific - needs more testing.
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if list.len == 1 {
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list = [list[0]]
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}
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} else {
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for entry in entries {
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if collect_all {
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list << append_separator_if_dir(entry)
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} else {
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if entry.starts_with(last) {
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list << append_separator_if_dir(entry)
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}
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}
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}
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}
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}
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}
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return list
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}
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fn main() {
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args := os.args[1..]
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// println('"$args"')
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auto_complete(args)
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}
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