Support remapping of source paths
This can be used to rewrite the source location.
Change-Id: Ic0e4a7fb0eb9ea115e9976bc3274e3aebd2b6770
Reviewed-on: https://fuchsia-review.googlesource.com/c/tools/+/406165
Commit-Queue: Petr Hosek <phosek@google.com>
Reviewed-by: Scott Graham <scottmg@google.com>
diff --git a/godepfile/cmd/godepfile.go b/godepfile/cmd/godepfile.go
index 1b94b68..4c35172 100644
--- a/godepfile/cmd/godepfile.go
+++ b/godepfile/cmd/godepfile.go
@@ -6,6 +6,7 @@
package main
import (
+ "errors"
"flag"
"fmt"
"go/build"
@@ -29,16 +30,41 @@
return nil
}
+type mapFlag map[string]string
+
+func (v *mapFlag) String() string {
+ var s []string
+ for from, to := range *v {
+ s = append(s, fmt.Sprintf("%s=%s", from, to))
+ }
+ return strings.Join(s, " ")
+}
+
+func (v *mapFlag) Set(s string) error {
+ if strings.Count(s, "=") != 1 {
+ return errors.New("argument must be of the form from=to")
+ }
+ i := strings.Index(s, "=")
+ from, to := s[:i], s[i+1:]
+ if from == "" || to == "" {
+ return errors.New("from and to must be non-empty")
+ }
+ (*v)[from] = to
+ return nil
+}
+
var (
- ctx = build.Default
- output string
- test bool
+ ctx = build.Default
+ output string
+ test bool
+ prefixmap = mapFlag{}
)
func init() {
flag.Var((*stringsFlag)(&ctx.BuildTags), "tags", "build tags")
flag.StringVar(&output, "o", "", "name of the resulting executable")
flag.BoolVar(&test, "test", false, "whether this is a test target")
+ flag.Var(&prefixmap, "prefixmap", "path prefix mapping in the from=to format")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "usage: godepfile [packages]\n")
@@ -46,6 +72,13 @@
}
}
+func appendAndPrefix(slice []string, prefix string, src []string) []string {
+ for _, s := range src {
+ slice = append(slice, prefix+s)
+ }
+ return slice
+}
+
func main() {
flag.Parse()
@@ -89,6 +122,12 @@
var files []string
srcdir := pkg.Dir + "/"
+ for from, to := range prefixmap {
+ if strings.HasPrefix(srcdir, from) {
+ srcdir = to + srcdir[len(from):]
+ }
+ }
+
files = appendAndPrefix(files, srcdir, pkg.GoFiles)
files = appendAndPrefix(files, srcdir, pkg.CgoFiles)
files = appendAndPrefix(files, srcdir, pkg.CFiles)
@@ -155,10 +194,3 @@
}
fmt.Printf("\n")
}
-
-func appendAndPrefix(slice []string, prefix string, src []string) []string {
- for _, s := range src {
- slice = append(slice, prefix+s)
- }
- return slice
-}
