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100 lines
2.0 KiB
Go
100 lines
2.0 KiB
Go
package lint
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import (
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"bufio"
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"bytes"
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"fmt"
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"go/token"
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"os"
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"sync"
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)
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// ReadFile defines an abstraction for reading files.
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type ReadFile func(path string) (result []byte, err error)
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type disabledIntervalsMap = map[string][]DisabledInterval
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// Linter is used for linting set of files.
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type Linter struct {
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reader ReadFile
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}
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// New creates a new Linter
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func New(reader ReadFile) Linter {
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return Linter{reader: reader}
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}
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var (
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genHdr = []byte("// Code generated ")
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genFtr = []byte(" DO NOT EDIT.")
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)
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// Lint lints a set of files with the specified rule.
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func (l *Linter) Lint(packages [][]string, ruleSet []Rule, config Config) (<-chan Failure, error) {
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failures := make(chan Failure)
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var wg sync.WaitGroup
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for _, pkg := range packages {
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wg.Add(1)
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go func(pkg []string) {
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if err := l.lintPackage(pkg, ruleSet, config, failures); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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defer wg.Done()
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}(pkg)
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}
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go func() {
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wg.Wait()
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close(failures)
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}()
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return failures, nil
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}
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func (l *Linter) lintPackage(filenames []string, ruleSet []Rule, config Config, failures chan Failure) error {
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pkg := &Package{
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fset: token.NewFileSet(),
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files: map[string]*File{},
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mu: sync.Mutex{},
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}
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for _, filename := range filenames {
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content, err := l.reader(filename)
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if err != nil {
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return err
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}
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if isGenerated(content) && !config.IgnoreGeneratedHeader {
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continue
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}
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file, err := NewFile(filename, content, pkg)
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if err != nil {
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return err
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}
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pkg.files[filename] = file
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}
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if len(pkg.files) == 0 {
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return nil
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}
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pkg.lint(ruleSet, config, failures)
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return nil
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}
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// isGenerated reports whether the source file is generated code
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// according the rules from https://golang.org/s/generatedcode.
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// This is inherited from the original go lint.
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func isGenerated(src []byte) bool {
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sc := bufio.NewScanner(bytes.NewReader(src))
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for sc.Scan() {
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b := sc.Bytes()
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if bytes.HasPrefix(b, genHdr) && bytes.HasSuffix(b, genFtr) && len(b) >= len(genHdr)+len(genFtr) {
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return true
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}
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}
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return false
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}
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