tools/gen: Add flags for explicit output
`-o` will emit the files to the given root output directory
`--verbose` will print what's going on, to help with debugging
Omitting these flags will behave as before.
Also consolidate the utils package into fileutils. These were two packages with near identical functionality.
Change-Id: I855dd4b57807fb9239a52e7f357842d4ba2517ee
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107687
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
diff --git a/tools/src/fileutils/paths.go b/tools/src/fileutils/paths.go
new file mode 100644
index 0000000..741d3b6
--- /dev/null
+++ b/tools/src/fileutils/paths.go
@@ -0,0 +1,77 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fileutils
+
+import (
+ "fmt"
+ "os"
+ "path/filepath"
+ "runtime"
+ "strings"
+)
+
+// ThisLine returns the filepath and line number of the calling function
+func ThisLine() string {
+ _, file, line, ok := runtime.Caller(1)
+ if !ok {
+ return ""
+ }
+ return fmt.Sprintf("%v:%v", file, line)
+}
+
+// ThisDir returns the directory of the caller function
+func ThisDir() string {
+ _, file, _, ok := runtime.Caller(1)
+ if !ok {
+ return ""
+ }
+ return filepath.Dir(file)
+}
+
+// DawnRoot returns the path to the dawn project's root directory or empty
+// string if not found.
+func DawnRoot() string {
+ return pathOfFileInParentDirs(ThisDir(), "DEPS")
+}
+
+// pathOfFileInParentDirs looks for file with `name` in paths starting from
+// `path`, and up into parent directories, returning the clean path in which the
+// file is found, or empty string if not found.
+func pathOfFileInParentDirs(path string, name string) string {
+ sep := string(filepath.Separator)
+ path, _ = filepath.Abs(path)
+ numDirs := strings.Count(path, sep) + 1
+ for i := 0; i < numDirs; i++ {
+ test := filepath.Join(path, name)
+ if _, err := os.Stat(test); err == nil {
+ return filepath.Clean(path)
+ }
+
+ path = path + sep + ".."
+ }
+ return ""
+}
+
+// ExpandHome returns the string with all occurrences of '~' replaced with the
+// user's home directory. The the user's home directory cannot be found, then
+// the input string is returned.
+func ExpandHome(path string) string {
+ if strings.ContainsRune(path, '~') {
+ if home, err := os.UserHomeDir(); err == nil {
+ return strings.ReplaceAll(path, "~", home)
+ }
+ }
+ return path
+}
