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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.table
import v.token
struct Vet {
opt Options
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mut:
errors []vet.Error
file string
}
struct Options {
is_verbose bool
}
fn (vet &Vet) vprintln(s string) {
if !vet.opt.is_verbose {
return
}
println(s)
}
const vet_options = cmdline.options_after(os.args, ['vet'])
const is_force = '-force' in vet_options
const is_verbose = '-verbose' in vet_options || '-v' in vet_options
const show_warnings = '-hide-warnings' !in vet_options
fn main() {
opt := Options{
is_verbose: is_verbose
}
mut vet := Vet{
opt: opt
}
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 $path does not exist')
continue
}
if path.ends_with('.v') || path.ends_with('.vv') {
if path.contains('cmd/tools/vvet/tests/') {
if is_force || paths.len == 1 {
vet.vet_file(path, true)
continue
} else {
// The .vv files in that folder, are regression tests
// for `v vet` itself and thus are known to fail in
// a predictable way. They are run 1 by 1 by vet_test.v.
// They *should be skipped*, when run by more general
// invocations like for example `v vet cmd/tools`
eprintln("skipping vvet regression file: '$path' ...")
continue
}
}
}
if os.is_file(path) {
vet.vet_file(path, false)
}
if os.is_dir(path) {
vet.vprintln("vetting folder: '$path' ...")
vfiles := os.walk_ext(path, '.v')
vvfiles := os.walk_ext(path, '.vv')
mut files := []string{}
files << vfiles
files << vvfiles
for file in files {
if !is_force && file.ends_with('.vv') && file.contains('cmd/tools/vvet/tests/') {
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continue
}
vet.vet_file(file, false)
}
}
}
//
warnings := vet.errors.filter(it.kind == .warning)
errors := vet.errors.filter(it.kind == .error)
errors_vfmt := vet.errors.filter(it.kind == .error && it.fix == .vfmt)
if show_warnings {
for err in warnings {
eprintln('$err.file_path:$err.pos.line_nr: warning: $err.message')
}
}
for err in errors {
eprintln('$err.file_path:$err.pos.line_nr: error: $err.message')
}
if errors_vfmt.len > 0 {
eprintln('NB: You can run `v fmt -w file.v` to fix these automatically')
}
if errors.len > 0 {
exit(1)
}
}
fn (mut v Vet) error(msg string, line int, fix vet.FixKind) {
pos := token.Position{
line_nr: line + 1
}
v.errors << vet.Error{
message: msg
file_path: v.file
pos: pos
kind: .error
fix: fix
}
}
fn (mut v Vet) warn(msg string, line int, fix vet.FixKind) {
pos := token.Position{
line_nr: line + 1
}
v.errors << vet.Error{
message: msg
file_path: v.file
pos: pos
kind: .warning
fix: fix
}
}
// vet_file vets the file read from `path`.
fn (mut vt Vet) vet_file(path string, is_regression_test bool) {
if path.contains('/tests/') && !is_regression_test {
// skip all /tests/ files, since usually their content is not
// important enough to be documented/vetted, and they may even
// contain intentionally invalid code.
eprintln("skipping test file: '$path' ...")
return
}
vt.file = path
mut prefs := pref.new_preferences()
prefs.is_vet = true
table := table.new_table()
vt.vprintln("vetting file '$path'...")
_, errors := parser.parse_vet_file(path, table, prefs)
// Transfer errors from scanner and parser
vt.errors << errors
// Scan each line in file for things to improve
source_lines := os.read_lines(vt.file) or { []string{} }
for lnumber, line in source_lines {
vt.vet_line(source_lines, line, lnumber)
}
}
// vet_line vets the contents of `line` from `vet.file`.
fn (mut vet Vet) vet_line(lines []string, line string, lnumber int) {
// Vet public functions
if line.starts_with('pub fn') || (line.starts_with('fn ') && !(line.starts_with('fn C.')
|| line.starts_with('fn main'))) {
// Scan function declarations for missing documentation
is_pub_fn := line.starts_with('pub fn')
if lnumber > 0 {
collect_tags := fn (line string) []string {
mut cleaned := line.all_before('/')
cleaned = cleaned.replace_each(['[', '', ']', '', ' ', ''])
return cleaned.split(',')
}
ident_fn_name := fn (line string) string {
mut fn_idx := line.index(' fn ') or { return '' }
if line.len < fn_idx + 5 {
return ''
}
mut tokens := line[fn_idx + 4..].split(' ')
// Skip struct identifier
if tokens.first().starts_with('(') {
fn_idx = line.index(')') or { return '' }
tokens = line[fn_idx..].split(' ')
if tokens.len > 1 {
tokens = [tokens[1]]
}
}
if tokens.len > 0 {
return tokens[0].all_before('(')
}
return ''
}
mut line_above := lines[lnumber - 1]
mut tags := []string{}
if !line_above.starts_with('//') {
mut grab := true
for j := lnumber - 1; j >= 0; j-- {
prev_line := lines[j]
if prev_line.contains('}') { // We've looked back to the above scope, stop here
break
} else if prev_line.starts_with('[') {
tags << collect_tags(prev_line)
continue
} else if prev_line.starts_with('//') { // Single-line comment
grab = false
break
}
}
if grab {
clean_line := line.all_before_last('{').trim(' ')
if is_pub_fn {
vet.warn('Function documentation seems to be missing for "$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('// $fn_name') {
grab = false
if is_pub_fn {
clean_line := line.all_before_last('{').trim(' ')
vet.warn('The documentation for "$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 {
vet.warn('A function name is missing from the documentation of "$clean_line".',
lnumber, .doc)
}
}
}
}
}
}