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v/cmd/tools/vfmt.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module main
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import os
import os.cmdline
import v.ast
import v.pref
import v.fmt
import v.util
import v.parser
import v.table
import vhelp
struct FormatOptions {
is_l bool
is_c bool
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is_js bool
is_w bool
is_diff bool
is_verbose bool
is_all bool
is_worker bool
is_debug bool
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is_noerror bool
}
const (
platform_and_file_extensions = [['windows', '_windows.v'], ['linux', '_lin.v',
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'_linux.v', '_nix.v'], ['macos', '_mac.v', '_darwin.v'], ['freebsd', '_bsd.v', '_freebsd.v'],
['netbsd', '_bsd.v', '_netbsd.v'], ['openbsd', '_bsd.v', '_openbsd.v'], ['solaris', '_solaris.v'],
['haiku', '_haiku.v'], ['qnx', '_qnx.v']]
FORMATTED_FILE_TOKEN = '\@\@\@' + 'FORMATTED_FILE: '
)
fn main() {
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// if os.getenv('VFMT_ENABLE') == '' {
// eprintln('v fmt is disabled for now')
// exit(1)
// }
toolexe := os.executable()
util.set_vroot_folder(os.dir(os.dir(os.dir(toolexe))))
args := util.join_env_vflags_and_os_args()
foptions := FormatOptions{
is_c: '-c' in args
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is_js: '-js' in args
is_l: '-l' in args
is_w: '-w' in args
is_diff: '-diff' in args
is_verbose: '-verbose' in args || '--verbose' in args
is_all: '-all' in args || '--all' in args
is_worker: '-worker' in args
is_debug: '-debug' in args
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is_noerror: '-noerror' in args
}
if foptions.is_verbose {
eprintln('vfmt foptions: $foptions')
}
if foptions.is_worker {
// -worker should be added by a parent vfmt process.
// We launch a sub process for each file because
// the v compiler can do an early exit if it detects
// a syntax error, but we want to process ALL passed
// files if possible.
foptions.format_file(cmdline.option(args, '-worker', ''))
exit(0)
}
// we are NOT a worker at this stage, i.e. we are a parent vfmt process
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possible_files := cmdline.only_non_options(cmdline.options_after(args, ['fmt']))
if foptions.is_verbose {
eprintln('vfmt toolexe: $toolexe')
eprintln('vfmt args: ' + os.args.str())
eprintln('vfmt env_vflags_and_os_args: ' + args.str())
eprintln('vfmt possible_files: ' + possible_files.str())
}
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mut files := []string{}
for file in possible_files {
if !file.ends_with('.v') && !file.ends_with('.vv') {
verror('v fmt can only be used on .v files.\nOffending file: "$file"')
continue
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}
if !os.exists(file) {
verror('"$file" does not exist')
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continue
}
files << file
}
if files.len == 0 {
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vhelp.show_topic('fmt')
exit(0)
}
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mut cli_args_no_files := []string{}
for a in os.args {
if a !in files {
cli_args_no_files << a
}
}
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mut errors := 0
for file in files {
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fpath := os.real_path(file)
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mut worker_command_array := cli_args_no_files.clone()
worker_command_array << ['-worker', fpath]
worker_cmd := worker_command_array.join(' ')
if foptions.is_verbose {
eprintln('vfmt worker_cmd: $worker_cmd')
}
worker_result := os.exec(worker_cmd) or {
errors++
continue
}
if worker_result.exit_code != 0 {
eprintln(worker_result.output)
if worker_result.exit_code == 1 {
eprintln('vfmt error while formatting file: $file .')
}
errors++
continue
}
if worker_result.output.len > 0 {
if worker_result.output.contains(FORMATTED_FILE_TOKEN) {
wresult := worker_result.output.split(FORMATTED_FILE_TOKEN)
formatted_warn_errs := wresult[0]
formatted_file_path := wresult[1]
foptions.post_process_file(fpath, formatted_file_path)
if formatted_warn_errs.len > 0 {
eprintln(formatted_warn_errs)
}
continue
}
}
errors++
}
if errors > 0 {
eprintln('Encountered a total of: ${errors} errors.')
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if foptions.is_noerror {
exit(0)
}
exit(1)
}
}
fn (foptions &FormatOptions) format_file(file string) {
prefs := pref.new_preferences()
prefs.is_fmt = util.is_fmt()
if foptions.is_verbose {
eprintln('vfmt2 running fmt.fmt over file: $file')
}
table := table.new_table()
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// checker := checker.new_checker(table, prefs)
file_ast := parser.parse_file(file, table, .parse_comments, prefs, &ast.Scope{
parent: 0
})
// checker.check(file_ast)
formatted_content := fmt.fmt(file_ast, table)
file_name := os.file_name(file)
vfmt_output_path := os.join_path(os.temp_dir(), 'vfmt_' + file_name)
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os.write_file(vfmt_output_path, formatted_content)
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if foptions.is_verbose {
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eprintln('fmt.fmt worked and ${formatted_content.len} bytes were written to ${vfmt_output_path} .')
}
eprintln('${FORMATTED_FILE_TOKEN}${vfmt_output_path}')
}
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fn print_compiler_options(compiler_params &pref.Preferences) {
eprintln(' os: ' + compiler_params.os.str())
eprintln(' ccompiler: $compiler_params.ccompiler')
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eprintln(' mod: $compiler_params.mod ')
eprintln(' path: $compiler_params.path ')
eprintln(' out_name: $compiler_params.out_name ')
eprintln(' vroot: $compiler_params.vroot ')
eprintln('lookup_path: $compiler_params.lookup_path ')
eprintln(' out_name: $compiler_params.out_name ')
eprintln(' cflags: $compiler_params.cflags ')
eprintln(' is_test: $compiler_params.is_test ')
eprintln(' is_script: $compiler_params.is_script ')
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}
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fn (foptions &FormatOptions) post_process_file(file, formatted_file_path string) {
if formatted_file_path.len == 0 {
return
}
if foptions.is_diff {
diff_cmd := find_working_diff_command() or {
eprintln('No working "diff" CLI command found.')
return
}
os.system('$diff_cmd --minimal --text --unified=2 --show-function-line="fn " "$file" "$formatted_file_path" ')
return
}
fc := os.read_file(file) or {
eprintln('File $file could not be read')
return
}
formatted_fc := os.read_file(formatted_file_path) or {
eprintln('File $formatted_file_path could not be read')
return
}
is_formatted_different := fc != formatted_fc
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if foptions.is_c || foptions.is_js {
if is_formatted_different {
eprintln('File is not formatted: $file')
exit(2)
}
return
}
if foptions.is_l {
if is_formatted_different {
eprintln('File needs formatting: $file')
}
return
}
if foptions.is_w {
if is_formatted_different {
os.mv_by_cp(formatted_file_path, file) or {
panic(err)
}
eprintln('Reformatted file: $file')
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} else {
eprintln('Already formatted file: $file')
}
return
}
print(formatted_fc)
}
fn find_working_diff_command() ?string {
for diffcmd in ['colordiff', 'diff', 'colordiff.exe', 'diff.exe'] {
p := os.exec('$diffcmd --version') or {
continue
}
if p.exit_code == 0 {
return diffcmd
}
}
return error('no working diff command found')
}
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fn (f FormatOptions) str() string {
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return 'FormatOptions{ is_l: $f.is_l' + ' is_w: $f.is_w' + ' is_diff: $f.is_diff' + ' is_verbose: $f.is_verbose' +
' is_all: $f.is_all' + ' is_worker: $f.is_worker' + ' is_debug: $f.is_debug' + ' }'
}
fn file_to_target_os(file string) string {
for extensions in platform_and_file_extensions {
for ext in extensions {
if file.ends_with(ext) {
return extensions[0]
}
}
}
return ''
}
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fn file_to_mod_name_and_is_module_file(file string) (string, bool) {
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mut mod_name := 'main'
mut is_module_file := false
flines := read_source_lines(file) or {
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return mod_name, is_module_file
}
for fline in flines {
line := fline.trim_space()
if line.starts_with('module ') {
if !line.starts_with('module main') {
is_module_file = true
mod_name = line.replace('module ', ' ').trim_space()
}
break
}
}
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return mod_name, is_module_file
}
fn read_source_lines(file string) ?[]string {
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source_lines := os.read_lines(file) or {
return error('can not read $file')
}
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return source_lines
}
fn get_compile_name_of_potential_v_project(file string) string {
// This function get_compile_name_of_potential_v_project returns:
// a) the file's folder, if file is part of a v project
// b) the file itself, if the file is a standalone v program
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pfolder := os.real_path(os.dir(file))
// a .v project has many 'module main' files in one folder
// if there is only one .v file, then it must be a standalone
all_files_in_pfolder := os.ls(pfolder) or {
panic(err)
}
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mut vfiles := []string{}
for f in all_files_in_pfolder {
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vf := os.join_path(pfolder, f)
if f.starts_with('.') || !f.ends_with('.v') || os.is_dir(vf) {
continue
}
vfiles << vf
}
if vfiles.len == 1 {
return file
}
// /////////////////////////////////////////////////////////////
// At this point, we know there are many .v files in the folder
// We will have to read them all, and if there are more than one
// containing `fn main` then the folder contains multiple standalone
// v programs. If only one contains `fn main` then the folder is
// a project folder, that should be compiled with `v pfolder`.
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mut main_fns := 0
for f in vfiles {
slines := read_source_lines(f) or {
panic(err)
}
for line in slines {
if line.contains('fn main()') {
main_fns++
if main_fns > 1 {
return file
}
}
}
}
return pfolder
}
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fn verror(s string) {
util.verror('vfmt error', s)
}