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
|
package main
import (
"fmt"
"os/exec"
"strings"
"syscall"
"time"
)
type Job struct {
n *DepNode
ex *Executor
parents []*Job
outputTs int64
numDeps int
depsTs int64
}
type runner struct {
output string
cmd string
echo bool
dryRun bool
ignoreError bool
shell string
}
func evalCmd(ev *Evaluator, r runner, s string) []runner {
r = newRunner(r, s)
if strings.IndexByte(r.cmd, '$') < 0 {
// fast path
return []runner{r}
}
// TODO(ukai): parse once more earlier?
expr, _, err := parseExpr([]byte(r.cmd), nil)
if err != nil {
panic(fmt.Errorf("parse cmd %q: %v", r.cmd, err))
}
cmds := string(ev.Value(expr))
var runners []runner
for _, cmd := range strings.Split(cmds, "\n") {
if len(runners) > 0 && strings.HasSuffix(runners[0].cmd, "\\") {
runners[0].cmd += "\n"
runners[0].cmd += cmd
} else {
runners = append(runners, newRunner(r, cmd))
}
}
return runners
}
func newRunner(r runner, s string) runner {
for {
s = trimLeftSpace(s)
if s == "" {
return runner{}
}
switch s[0] {
case '@':
if !r.dryRun {
r.echo = false
}
s = s[1:]
continue
case '-':
r.ignoreError = true
s = s[1:]
continue
}
break
}
r.cmd = s
return r
}
func (r runner) run(output string) error {
if r.echo || dryRunFlag {
fmt.Printf("%s\n", r.cmd)
}
if dryRunFlag {
return nil
}
args := []string{r.shell, "-c", r.cmd}
cmd := exec.Cmd{
Path: args[0],
Args: args,
}
out, err := cmd.CombinedOutput()
fmt.Printf("%s", out)
exit := exitStatus(err)
if r.ignoreError && exit != 0 {
fmt.Printf("[%s] Error %d (ignored)\n", output, exit)
err = nil
}
return err
}
func (j Job) createRunners() []runner {
ex := j.ex
// For automatic variables.
ex.currentOutput = j.n.Output
ex.currentInputs = j.n.ActualInputs
var restores []func()
for k, v := range j.n.TargetSpecificVars {
restores = append(restores, ex.vars.save(k))
ex.vars[k] = v
}
defer func() {
for _, restore := range restores {
restore()
}
}()
ev := newEvaluator(ex.vars)
ev.filename = j.n.Filename
ev.lineno = j.n.Lineno
var runners []runner
Log("Building: %s cmds:%q", j.n.Output, j.n.Cmds)
r := runner{
output: j.n.Output,
echo: true,
dryRun: dryRunFlag,
shell: ex.shell,
}
for _, cmd := range j.n.Cmds {
for _, r := range evalCmd(ev, r, cmd) {
if len(r.cmd) != 0 {
runners = append(runners, r)
}
}
}
return runners
}
func (j Job) build() error {
if j.n.IsPhony {
j.outputTs = -2 // trigger cmd even if all inputs don't exist.
} else {
j.outputTs = getTimestamp(j.n.Output)
}
if !j.n.HasRule {
if j.outputTs >= 0 || j.n.IsPhony {
//ex.done[output] = outputTs
//ex.noRuleCnt++
//return outputTs, nil
return nil
}
if len(j.parents) == 0 {
ErrorNoLocation("*** No rule to make target %q.", j.n.Output)
} else {
ErrorNoLocation("*** No rule to make target %q, needed by %q.", j.n.Output, j.parents[0].n.Output)
}
return fmt.Errorf("no rule to make target %q", j.n.Output)
}
if j.outputTs >= j.depsTs {
// TODO: stats.
return nil
}
for _, r := range j.createRunners() {
err := r.run(j.n.Output)
if err != nil {
exit := exitStatus(err)
ErrorNoLocation("[%s] Error %d: %v", j.n.Output, exit, err)
}
}
if j.n.IsPhony {
j.outputTs = time.Now().Unix()
} else {
j.outputTs = getTimestamp(j.n.Output)
if j.outputTs < 0 {
j.outputTs = time.Now().Unix()
}
}
return nil
}
func (j Job) run() error {
if err := j.build(); err != nil {
return err
}
for _, p := range j.parents {
p.numDeps--
if p.depsTs < j.outputTs {
p.depsTs = j.outputTs
}
/*
if p.numDeps == 0 {
p.run()
}
*/
}
return nil
}
type WorkerManager struct {
jobs []*Job
jobChan chan *Job
waitChan chan bool
doneChan chan bool
}
func NewWorkerManager() *WorkerManager {
wm := &WorkerManager{
jobChan: make(chan *Job),
waitChan: make(chan bool),
doneChan: make(chan bool),
}
go wm.Run()
return wm
}
func exitStatus(err error) int {
if err == nil {
return 0
}
exit := 1
if err, ok := err.(*exec.ExitError); ok {
if w, ok := err.ProcessState.Sys().(syscall.WaitStatus); ok {
return w.ExitStatus()
}
}
return exit
}
func (wm *WorkerManager) Run() {
done := false
for len(wm.jobs) > 0 || !done {
select {
case j := <-wm.jobChan:
if j.numDeps == 0 {
err := j.run()
if err != nil {
exit := exitStatus(err)
ErrorNoLocation("[%s] Error %d: %v", j.n.Output, exit, err)
}
}
case done = <-wm.waitChan:
}
}
wm.doneChan <- true
}
func (wm *WorkerManager) PostJob(j *Job) {
wm.jobChan <- j
}
func (wm *WorkerManager) Wait() {
wm.waitChan <- true
<-wm.doneChan
}
|
