forked from golang/lint
/
golint.go
152 lines (135 loc) · 3.44 KB
/
golint.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
package main
import (
"flag"
"fmt"
"go/build"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/warrially/lint"
)
var (
minConfidence = flag.Float64("min_confidence", 0.8, "minimum confidence of a problem to print it")
setExitStatus = flag.Bool("set_exit_status", false, "set exit status to 1 if any issues are found")
suggestions int
)
func usage() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
fmt.Fprintf(os.Stderr, "\tgolint [flags] # runs on package in current directory\n")
fmt.Fprintf(os.Stderr, "\tgolint [flags] [packages]\n")
fmt.Fprintf(os.Stderr, "\tgolint [flags] [directories] # where a '/...' suffix includes all sub-directories\n")
fmt.Fprintf(os.Stderr, "\tgolint [flags] [files] # all must belong to a single package\n")
fmt.Fprintf(os.Stderr, "Flags:\n")
flag.PrintDefaults()
}
func main() {
flag.Usage = usage
flag.Parse()
if flag.NArg() == 0 {
lintDir(".")
} else {
// dirsRun, filesRun, and pkgsRun indicate whether golint is applied to
// directory, file or package targets. The distinction affects which
// checks are run. It is no valid to mix target types.
var dirsRun, filesRun, pkgsRun int
var args []string
for _, arg := range flag.Args() {
if strings.HasSuffix(arg, "/...") && isDir(arg[:len(arg)-len("/...")]) {
dirsRun = 1
for _, dirname := range allPackagesInFS(arg) {
args = append(args, dirname)
}
} else if isDir(arg) {
dirsRun = 1
args = append(args, arg)
} else if exists(arg) {
filesRun = 1
args = append(args, arg)
} else {
pkgsRun = 1
args = append(args, arg)
}
}
if dirsRun+filesRun+pkgsRun != 1 {
usage()
os.Exit(2)
}
switch {
case dirsRun == 1:
for _, dir := range args {
lintDir(dir)
}
case filesRun == 1:
lintFiles(args...)
case pkgsRun == 1:
for _, pkg := range importPaths(args) {
lintPackage(pkg)
}
}
}
if *setExitStatus && suggestions > 0 {
fmt.Fprintf(os.Stderr, "Found %d lint suggestions; failing.\n", suggestions)
os.Exit(1)
}
}
func isDir(filename string) bool {
fi, err := os.Stat(filename)
return err == nil && fi.IsDir()
}
func exists(filename string) bool {
_, err := os.Stat(filename)
return err == nil
}
func lintFiles(filenames ...string) {
files := make(map[string][]byte)
for _, filename := range filenames {
src, err := ioutil.ReadFile(filename)
if err != nil {
fmt.Fprintln(os.Stderr, err)
continue
}
files[filename] = src
}
l := new(lint.Linter)
ps, err := l.LintFiles(files)
if err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
return
}
for _, p := range ps {
if p.Confidence >= *minConfidence {
fmt.Printf("%v: %s\n", p.Position, p.Text)
suggestions++
}
}
}
func lintDir(dirname string) {
pkg, err := build.ImportDir(dirname, 0)
lintImportedPackage(pkg, err)
}
func lintPackage(pkgname string) {
pkg, err := build.Import(pkgname, ".", 0)
lintImportedPackage(pkg, err)
}
func lintImportedPackage(pkg *build.Package, err error) {
if err != nil {
if _, nogo := err.(*build.NoGoError); nogo {
// Don't complain if the failure is due to no Go source files.
return
}
fmt.Fprintln(os.Stderr, err)
return
}
var files []string
files = append(files, pkg.GoFiles...)
files = append(files, pkg.CgoFiles...)
files = append(files, pkg.TestGoFiles...)
if pkg.Dir != "." {
for i, f := range files {
files[i] = filepath.Join(pkg.Dir, f)
}
}
// TODO(dsymonds): Do foo_test too (pkg.XTestGoFiles)
lintFiles(files...)
}