Add a tool to check for filename collisions.
GN does not like multiple files in the same target that share a name, so
add a script to check for this. A follow-up changes will hook that up to
the builders, so we'll flag this in try jobs rather than when the change
trickles downstream.
Change-Id: Ic413dd9aeed6da54fc85dea07f80fe7084be9e9e
Reviewed-on: https://boringssl-review.googlesource.com/28844
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/util/check_filenames.go b/util/check_filenames.go
new file mode 100644
index 0000000..886c3f6
--- /dev/null
+++ b/util/check_filenames.go
@@ -0,0 +1,67 @@
+// Copyright (c) 2018, Google Inc.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+// check_filenames.go checks that filenames are unique. Some of our consumers do
+// not support multiple files with the same name in the same build target, even
+// if they are in different directories.
+package main
+
+import (
+ "fmt"
+ "os"
+ "path/filepath"
+ "strings"
+)
+
+func isSourceFile(in string) bool {
+ return strings.HasSuffix(in, ".c") || strings.HasSuffix(in, ".cc")
+}
+
+func main() {
+ var roots = []string{
+ "crypto",
+ filepath.Join("third_party", "fiat"),
+ "ssl",
+ }
+
+ names := make(map[string]string)
+ var foundCollisions bool
+ for _, root := range roots {
+ err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+ if err != nil {
+ return err
+ }
+ if info.IsDir() {
+ return nil
+ }
+ name := strings.ToLower(info.Name()) // Windows and macOS are case-insensitive.
+ if isSourceFile(name) {
+ if oldPath, ok := names[name]; ok {
+ fmt.Printf("Filename collision found: %s and %s\n", path, oldPath)
+ foundCollisions = true
+ } else {
+ names[name] = path
+ }
+ }
+ return nil
+ })
+ if err != nil {
+ fmt.Printf("Error traversing %s: %s\n", root, err)
+ os.Exit(1)
+ }
+ }
+ if foundCollisions {
+ os.Exit(1)
+ }
+}
