[whereiscl] add --help (or -h) to show usage info
Bug: DX-1516 #comment
Change-Id: Ia601d4b91eb7cd9e38434839e4635a8ffa1de343
diff --git a/tools/whereiscl/whereiscl.go b/tools/whereiscl/whereiscl.go
index ab9acdd..1d7fac6 100644
--- a/tools/whereiscl/whereiscl.go
+++ b/tools/whereiscl/whereiscl.go
@@ -10,6 +10,7 @@
import (
"errors"
+ "flag"
"fmt"
"log"
"os"
@@ -18,6 +19,23 @@
"fuchsia.googlesource.com/fuchsia/tools/whereiscl/lib"
)
+func init() {
+ flag.Usage = func() {
+ fmt.Fprintf(flag.CommandLine.Output(), `Usage: whereiscl <review URL>
+
+Answers whether a CL is merged (or abandoned) and whether it passed Global Integration.
+
+Examples:
+ $ whereiscl https://fuchsia-review.googlesource.com/c/fuchsia/+/123456789
+ $ whereiscl fuchsia-review.googlesource.com/c/fuchsia/+/123456789/some/file
+ $ whereiscl http://fxr/123456789
+ $ whereiscl fxr/123456789/some/file
+
+`)
+ flag.PrintDefaults()
+ }
+}
+
const fuchsiaReviewURL = "https://fuchsia-review.googlesource.com"
// fuchsiaRE is a regexp for matching CL review URLs and extracting the CL numbers.
@@ -41,14 +59,17 @@
}
func main() {
- if len(os.Args) < 2 {
+ flag.Parse()
+
+ if flag.NArg() == 0 {
// TODO: Consider alternatives. E.g., show all outstanding CLs
// of the current user, or show all CLs that are pending in
// Global Integration.
- log.Fatal("Review URL must be provided")
+ flag.Usage()
+ os.Exit(1)
}
- queryInfo, err := parseReviewURL(os.Args[1])
+ queryInfo, err := parseReviewURL(flag.Arg(0))
if err != nil {
log.Fatalf("Error parsing the review URL: %v", err)
}
