-
Notifications
You must be signed in to change notification settings - Fork 1
/
runner.go
298 lines (243 loc) · 7.51 KB
/
runner.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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
package exe
import (
"bytes"
"context"
"fmt"
"os"
"os/exec"
"strings"
"text/template"
"time"
)
// Runner combines all run functions into one interface.
type Runner interface {
Run(cmd *exec.Cmd, name string, settings ...SettingsFunc)
RunE(cmd *exec.Cmd, name string, settings ...SettingsFunc) (err error)
RunWithOutput(cmd *exec.Cmd, name string, settings ...SettingsFunc) string
RunWithOutputE(cmd *exec.Cmd, name string, settings ...SettingsFunc) (out string, err error)
SplitCommand(s string) []string
Execute(s string, obj interface{}, settings ...SettingsFunc) *exec.Cmd
ExecuteE(s string, obj interface{}, settings ...SettingsFunc) (*exec.Cmd, error)
ExecuteWithContext(ctx context.Context, s string, obj interface{}, settings ...SettingsFunc) *exec.Cmd
ExecuteEWithContext(ctx context.Context, s string, obj interface{}, settings ...SettingsFunc) (*exec.Cmd, error)
ExecuteWithOutput(s string, obj interface{}, settings ...SettingsFunc) string
ExecuteWithOutputE(s string, obj interface{}, settings ...SettingsFunc) (out string, err error)
}
// DefaultRunner returns the default Runner implementation.
func DefaultRunner() Runner {
return &runner{}
}
type runner struct {
}
func (r *runner) Run(cmd *exec.Cmd, name string, settings ...SettingsFunc) {
if err := r.RunE(cmd, name, settings...); err != nil {
os.Exit(1)
}
}
func (r *runner) RunE(cmd *exec.Cmd, name string, settings ...SettingsFunc) (err error) {
setting := getSetting(settings)
applySettings(cmd, setting)
_, err = runWithSettings(cmd, setting)
if err != nil {
fmt.Printf("%s failed: %v\n", name, err)
return err
}
return nil
}
func (r *runner) RunWithOutput(cmd *exec.Cmd, name string, settings ...SettingsFunc) string {
out, err := r.RunWithOutputE(cmd, name, settings...)
if err != nil {
os.Exit(1)
}
return out
}
func (r *runner) RunWithOutputE(cmd *exec.Cmd, name string, settings ...SettingsFunc) (out string, err error) {
setting := getSetting(append(settings, withOutput))
applySettings(cmd, setting)
out, err = runWithSettings(cmd, setting)
if err != nil {
fmt.Printf("%s - %v failed with %v\n", name, cmd, err)
return out, err
}
return
}
func (r *runner) SplitCommand(s string) []string {
runes := []rune(s)
var values []string
for len(runes) != 0 {
// Workaround for bug which triggers if "" is detected,
// then space is the first character instead of a possible " afterwards.
runes = []rune(strings.TrimSpace(string(runes)))
if len(runes) == 0 {
break
}
currentRunes := string(runes)
_ = currentRunes
first := string(runes[0])
_ = first
// TODO: ' and " can be in the middle of a token, so checking the start of a string is not enough.
if runes[0] == '"' {
next := search(runes[1:], "\"")
if next == -1 {
panic("no matching \": " + s)
}
values = append(values, string(runes[1:next+1]))
runes = runes[next+2:]
} else {
// TODO: If ' before next space, do skip this space and go instead to the next ' to continue from there.
next := search(runes, " ")
if next == -1 {
values = append(values, string(runes))
break
}
nextSpecial := search(runes, "'")
// Early return if nextSpecial is not so.
if nextSpecial == -1 || nextSpecial > next {
values = append(values, string(runes[:next]))
runes = runes[next+1:]
continue
}
var current []rune
for next != -1 && nextSpecial != -1 && nextSpecial < next {
// Skip newlines enclosed by specials ' '.
// Add to current.
current = append(current, runes[:nextSpecial]...)
// Move ahead.
runes = runes[nextSpecial+1:]
// Find the closing special character.
nextSpecial = search(runes, "'")
if nextSpecial == -1 {
panic("no matching ': " + s)
}
// Add up to the closing parameter to current.
current = append(current, runes[:nextSpecial]...)
// Mve ahead.
runes = runes[nextSpecial+1:]
nextSpecial = search(runes, "'")
next = search(runes, " ")
}
next = search(runes, " ")
if next == -1 {
// Add current to last part.
values = append(values, string(append(current, runes...)))
// Move ahead.
break
}
// Add current to closing part.
values = append(values, string(append(current, runes[:next]...)))
// Move ahead.
runes = runes[next+1:]
}
}
out := make([]string, len(values))
copy(out, values)
return out
}
func (r *runner) Execute(s string, obj interface{}, settings ...SettingsFunc) *exec.Cmd {
return r.ExecuteWithContext(context.Background(), s, obj, settings...)
}
func (r *runner) ExecuteE(s string, obj interface{}, settings ...SettingsFunc) (*exec.Cmd, error) {
return r.ExecuteEWithContext(context.Background(), s, obj, settings...)
}
func (r *runner) ExecuteWithContext(ctx context.Context, s string, obj interface{}, settings ...SettingsFunc) *exec.Cmd {
cmd, _ := r.ExecuteEWithContext(ctx, s, obj, settings...)
return cmd
}
func (r *runner) ExecuteEWithContext(ctx context.Context, s string, obj interface{}, settings ...SettingsFunc) (*exec.Cmd, error) {
t := template.Must(template.New("").Parse(s))
var tpl bytes.Buffer
if err := t.Execute(&tpl, obj); err != nil {
panic(err)
}
fmt.Println(tpl.String())
args := r.SplitCommand(os.ExpandEnv(tpl.String()))
//args := strings.Split(tpl.String(), " ")
if len(args) == 0 {
panic("template length was zero.")
}
cmd := exec.CommandContext(ctx, args[0], args[1:]...)
return cmd, r.RunE(cmd, args[0], settings...)
}
func (r *runner) ExecuteWithOutput(s string, obj interface{}, settings ...SettingsFunc) string {
out, err := r.ExecuteWithOutputE(s, obj, settings...)
if err != nil {
fmt.Printf("Command failed with %v\n", err)
os.Exit(1)
}
return out
}
func (r *runner) ExecuteWithOutputE(s string, obj interface{}, settings ...SettingsFunc) (out string, err error) {
t := template.Must(template.New("").Parse(s))
var tpl bytes.Buffer
if err := t.Execute(&tpl, obj); err != nil {
panic(err)
}
fmt.Println(tpl.String())
args := r.SplitCommand(os.ExpandEnv(tpl.String()))
if len(args) == 0 {
panic("template length was zero.")
}
cmd := exec.Command(args[0], args[1:]...)
return r.RunWithOutputE(cmd, args[0], settings...)
}
func getSetting(settings []SettingsFunc) ExecuteSetting {
setting := defaultSettings()
for _, settingsFunc := range settings {
settingsFunc(&setting)
}
return setting
}
func applySettings(cmd *exec.Cmd, setting ExecuteSetting) {
if setting.dir != "" {
cmd.Dir = os.ExpandEnv(setting.dir)
}
if setting.output {
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
} else {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
}
}
func defaultSettings() ExecuteSetting {
return ExecuteSetting{}
}
func runWithSettings(cmd *exec.Cmd, setting ExecuteSetting) (out string, err error) {
var timer *time.Timer
exited := false
var errFromTimeout error
if setting.timeout != 0 {
timer = time.AfterFunc(setting.timeout, func() {
if !exited {
errFromTimeout = cmd.Process.Kill()
}
})
}
switch {
case setting.start && setting.output:
panic("can't do start with output")
case setting.start && !setting.output:
err = cmd.Start()
case !setting.start && setting.output:
var byteOut []byte
byteOut, err = cmd.Output()
if byteOut != nil {
out = strings.TrimSpace(string(byteOut))
}
default:
err = cmd.Run()
}
if errFromTimeout != nil {
if err != nil {
err = fmt.Errorf("error from timeout %v wraps err: %v", errFromTimeout, err)
} else {
err = fmt.Errorf("error from timeout: %v", errFromTimeout)
}
}
exited = true
if timer != nil {
timer.Stop()
}
return out, err
}