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v/cmd/tools/vvet/vvet.v

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// Copyright (c) 2019-2021 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
import os
import os.cmdline
import v.vet
import v.pref
import v.parser
import v.token
import v.ast
import term
struct Vet {
opt Options
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mut:
errors []vet.Error
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warns []vet.Error
file string
}
struct Options {
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is_force bool
is_werror bool
is_verbose bool
show_warnings bool
use_color bool
}
const term_colors = term.can_show_color_on_stderr()
fn main() {
vet_options := cmdline.options_after(os.args, ['vet'])
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mut vt := Vet{
opt: Options{
is_force: '-force' in vet_options
is_werror: '-W' in vet_options
is_verbose: '-verbose' in vet_options || '-v' in vet_options
show_warnings: '-hide-warnings' !in vet_options && '-w' !in vet_options
use_color: '-color' in vet_options || (term_colors && '-nocolor' !in vet_options)
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}
}
mut paths := cmdline.only_non_options(vet_options)
vtmp := os.getenv('VTMP')
if vtmp != '' {
// `v test-cleancode` passes also `-o tmpfolder` as well as all options in VFLAGS
paths = paths.filter(!it.starts_with(vtmp))
}
for path in paths {
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if !os.exists(path) {
eprintln('File/folder $path does not exist')
continue
}
if os.is_file(path) {
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vt.vet_file(path)
}
if os.is_dir(path) {
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vt.vprintln("vetting folder: '$path' ...")
vfiles := os.walk_ext(path, '.v')
vvfiles := os.walk_ext(path, '.vv')
mut files := []string{}
files << vfiles
files << vvfiles
for file in files {
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vt.vet_file(file)
}
}
}
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vfmt_err_count := vt.errors.filter(it.fix == .vfmt).len
if vt.opt.show_warnings {
for w in vt.warns {
eprintln(vt.e2string(w))
}
}
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for err in vt.errors {
eprintln(vt.e2string(err))
}
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if vfmt_err_count > 0 {
eprintln('NB: You can run `v fmt -w file.v` to fix these errors automatically')
}
if vt.errors.len > 0 {
exit(1)
}
}
// vet_file vets the file read from `path`.
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fn (mut vt Vet) vet_file(path string) {
if path.contains('/tests/') && !vt.opt.is_force {
// skip all /tests/ files, since usually their content is not
// important enough to be documented/vetted, and they may even
// contain intentionally invalid code.
vt.vprintln("skipping test file: '$path' ...")
return
}
vt.file = path
mut prefs := pref.new_preferences()
prefs.is_vet = true
table := ast.new_table()
vt.vprintln("vetting file '$path'...")
_, errors := parser.parse_vet_file(path, table, prefs)
// Transfer errors from scanner and parser
vt.errors << errors
// Scan each line in file for things to improve
source_lines := os.read_lines(vt.file) or { []string{} }
for lnumber, line in source_lines {
vt.vet_line(source_lines, line, lnumber)
}
}
// vet_line vets the contents of `line` from `vet.file`.
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fn (mut vt Vet) vet_line(lines []string, line string, lnumber int) {
// Vet public functions
if line.starts_with('pub fn') || (line.starts_with('fn ') && !(line.starts_with('fn C.')
|| line.starts_with('fn main'))) {
// Scan function declarations for missing documentation
is_pub_fn := line.starts_with('pub fn')
if lnumber > 0 {
collect_tags := fn (line string) []string {
mut cleaned := line.all_before('/')
cleaned = cleaned.replace_each(['[', '', ']', '', ' ', ''])
return cleaned.split(',')
}
ident_fn_name := fn (line string) string {
mut fn_idx := line.index(' fn ') or { return '' }
if line.len < fn_idx + 5 {
return ''
}
mut tokens := line[fn_idx + 4..].split(' ')
// Skip struct identifier
if tokens.first().starts_with('(') {
fn_idx = line.index(')') or { return '' }
tokens = line[fn_idx..].split(' ')
if tokens.len > 1 {
tokens = [tokens[1]]
}
}
if tokens.len > 0 {
return tokens[0].all_before('(')
}
return ''
}
mut line_above := lines[lnumber - 1]
mut tags := []string{}
if !line_above.starts_with('//') {
mut grab := true
for j := lnumber - 1; j >= 0; j-- {
prev_line := lines[j]
if prev_line.contains('}') { // We've looked back to the above scope, stop here
break
} else if prev_line.starts_with('[') {
tags << collect_tags(prev_line)
continue
} else if prev_line.starts_with('//') { // Single-line comment
grab = false
break
}
}
if grab {
clean_line := line.all_before_last('{').trim(' ')
if is_pub_fn {
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vt.warn('Function documentation seems to be missing for "$clean_line".',
lnumber, .doc)
}
}
} else {
fn_name := ident_fn_name(line)
mut grab := true
for j := lnumber - 1; j >= 0; j-- {
prev_line := lines[j]
if prev_line.contains('}') { // We've looked back to the above scope, stop here
break
} else if prev_line.starts_with('// $fn_name ') {
grab = false
break
} else if prev_line.starts_with('// $fn_name') {
grab = false
if is_pub_fn {
clean_line := line.all_before_last('{').trim(' ')
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vt.warn('The documentation for "$clean_line" seems incomplete.',
lnumber, .doc)
}
break
} else if prev_line.starts_with('[') {
tags << collect_tags(prev_line)
continue
} else if prev_line.starts_with('//') { // Single-line comment
continue
}
}
if grab {
clean_line := line.all_before_last('{').trim(' ')
if is_pub_fn {
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vt.warn('A function name is missing from the documentation of "$clean_line".',
lnumber, .doc)
}
}
}
}
}
}
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fn (vt &Vet) vprintln(s string) {
if !vt.opt.is_verbose {
return
}
println(s)
}
fn (vt &Vet) e2string(err vet.Error) string {
mut kind := '$err.kind:'
mut location := '$err.file_path:$err.pos.line_nr:'
if vt.opt.use_color {
kind = match err.kind {
.warning { term.magenta(kind) }
.error { term.red(kind) }
}
kind = term.bold(kind)
location = term.bold(location)
}
return '$location $kind $err.message'
}
fn (mut vt Vet) error(msg string, line int, fix vet.FixKind) {
pos := token.Position{
line_nr: line + 1
}
vt.errors << vet.Error{
message: msg
file_path: vt.file
pos: pos
kind: .error
fix: fix
typ: .default
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}
}
fn (mut vt Vet) warn(msg string, line int, fix vet.FixKind) {
pos := token.Position{
line_nr: line + 1
}
mut w := vet.Error{
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message: msg
file_path: vt.file
pos: pos
kind: .warning
fix: fix
typ: .default
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}
if vt.opt.is_werror {
w.kind = .error
vt.errors << w
} else {
vt.warns << w
}
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}