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cmd/api: add flag to specify contexts

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I needed this to explore per-GOOS/GOARCH differences in pkg
syscall for a recent CL.  Others may find it useful too.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6236046
This commit is contained in:
Brad Fitzpatrick 2012-05-23 13:45:53 -07:00
parent e4ed9494e5
commit f430d0e609
1 changed files with 36 additions and 6 deletions
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42
src/cmd/api/goapi.go
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@ -41,8 +41,11 @@ var (
allowNew = flag.Bool("allow_new", true, "allow API additions")
nextFile = flag.String("next", "", "optional filename of tentative upcoming API features for the next release. This file can be lazily maintained. It only affects the delta warnings from the -c file printed on success.")
verbose = flag.Bool("v", false, "verbose debugging")
forceCtx = flag.String("contexts", "", "optional comma-separated list of <goos>-<goarch>[-cgo] to override default contexts.")
)
// contexts are the default contexts which are scanned, unless
// overridden by the -contexts flag.
var contexts = []*build.Context{
{GOOS: "linux", GOARCH: "386", CgoEnabled: true},
{GOOS: "linux", GOARCH: "386"},
@ -56,12 +59,6 @@ var contexts = []*build.Context{
{GOOS: "windows", GOARCH: "386"},
}
func init() {
for _, c := range contexts {
c.Compiler = build.Default.Compiler
}
}
func contextName(c *build.Context) string {
s := c.GOOS + "-" + c.GOARCH
if c.CgoEnabled {
@ -70,9 +67,42 @@ func contextName(c *build.Context) string {
return s
}
func parseContext(c string) *build.Context {
parts := strings.Split(c, "-")
if len(parts) < 2 {
log.Fatalf("bad context: %q", c)
}
bc := &build.Context{
GOOS: parts[0],
GOARCH: parts[1],
}
if len(parts) == 3 {
if parts[2] == "cgo" {
bc.CgoEnabled = true
} else {
log.Fatalf("bad context: %q", c)
}
}
return bc
}
func setContexts() {
contexts = []*build.Context{}
for _, c := range strings.Split(*forceCtx, ",") {
contexts = append(contexts, parseContext(c))
}
}
func main() {
flag.Parse()
if *forceCtx != "" {
setContexts()
}
for _, c := range contexts {
c.Compiler = build.Default.Compiler
}
var pkgs []string
if flag.NArg() > 0 {
pkgs = flag.Args()