add clang-fmt.go

tools/clang-fmt.go

@@ -0,0 +1,114 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+const (
+	// we used to use Mozilla style for the base, but they really changed the
+	// style between 3.5 and 3.7. Chromium style is close to Mozilla and
+	// even makes more sense about details like "char* s" vs. "char *"
+	clangStyle = `-style="{BasedOnStyle: Chromium, IndentWidth: 4, ColumnLimit: 100, UseTab: Never}"`
+)
+
+func fataliferr(err error) {
+	if err != nil {
+		fmt.Printf("err: %s\n", err)
+		os.Exit(1)
+	}
+}
+
+func toIntMust(s string) int {
+	n, err := strconv.Atoi(s)
+	fataliferr(err)
+	return n
+}
+
+// ensure we have at least version 3.7.0
+func verifyClangFormatVersion(exePath string) {
+	cmd := exec.Command(exePath, "--version")
+	out, err := cmd.Output()
+	fataliferr(err)
+	// output is in format: clang-format version 3.7.0 (tags/RELEASE_370/final)
+	s := strings.TrimSpace(string(out))
+	parts := strings.SplitN(s, " ", 4)
+	ver := parts[2]
+	parts = strings.Split(ver, ".")
+	// check version is at lest 3.7.0
+	n1 := toIntMust(parts[0])
+	n2 := toIntMust(parts[1])
+	n3 := 0
+	if len(parts) > 2 {
+		n3 = toIntMust(parts[2])
+	}
+	n := n1*100 + n2*10 + n3
+	if n < 370 {
+		fmt.Printf("Version should be at least 3.7.0 (is %s)\n", ver)
+		os.Exit(1)
+	}
+}
+
+func ifCmdFailed(err error, out []byte, cmd *exec.Cmd) {
+	if err == nil {
+		return
+	}
+	s := strings.Join(cmd.Args, " ")
+	fmt.Printf("'%s' failed with: '%s', out:\n'%s'\n", s, err, string(out))
+	os.Exit(1)
+}
+
+func isSrcFile(s string) bool {
+	ext := strings.ToLower(filepath.Ext(s))
+	switch ext {
+	case ".cpp", ".h":
+		return true
+	}
+	return false
+}
+
+func getSrcFilesMust(dir string) []string {
+	files, err := ioutil.ReadDir(dir)
+	fataliferr(err)
+	var srcFiles []string
+	for _, fi := range files {
+		name := fi.Name()
+		if isSrcFile(name) {
+			srcFiles = append(srcFiles, name)
+		}
+	}
+	return srcFiles
+}
+
+func runInDirMust(exePath string, dir string) {
+	files := getSrcFilesMust(dir)
+	for _, f := range files {
+		cmd := exec.Command(exePath, clangStyle, "-i", f)
+		cmd.Dir = dir
+		fmt.Printf("Running: '%s'\n", strings.Join(cmd.Args, " "))
+		out, err := cmd.CombinedOutput()
+		ifCmdFailed(err, out, cmd)
+	}
+}
+
+func main() {
+	var d string
+	exePath, err := exec.LookPath("clang-format")
+	fataliferr(err)
+	fmt.Printf("exe path: %s\n", exePath)
+	verifyClangFormatVersion(exePath)
+
+	d = filepath.Join("src", "utils")
+	//runInDirMust(exePath, d)
+
+	d = filepath.Join("src", "mui")
+	runInDirMust(exePath, d)
+
+	d = filepath.Join("src", "wingui")
+	runInDirMust(exePath, d)
+}