/
hgen.go
124 lines (101 loc) · 2.71 KB
/
hgen.go
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package main
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
)
const (
dirSep = "/"
configFile = ".hgenconfig"
)
func fileExists(dpath string) bool {
info, err := os.Stat(dpath)
if err != nil {
return false
}
return !info.IsDir()
}
func buildName(dstPath string) (relpath string, author string, err error) {
fname := path.Base(dstPath)
curPath := path.Dir(dstPath)
parts := []string{}
for !fileExists(path.Join(curPath, configFile)) {
parts = append([]string{path.Base(curPath)}, parts...)
newCurPath := path.Dir(curPath)
if newCurPath == curPath {
fail("Couldn't find %s. Did you create it?", configFile)
}
curPath = newCurPath
}
// TODO: This is ugly. Fix by making a real config file.
bs, err := ioutil.ReadFile(path.Join(curPath, configFile))
if err != nil {
return "", "", err
}
parts = append([]string{path.Base(curPath)}, parts...)
parts = append(parts, fname)
return path.Join(parts...), string(bs), nil
}
func guardFromPath(fpath string) string {
uscores := strings.Replace(fpath, dirSep, "_", -1)
nodots := strings.Replace(uscores, ".", "_", -1)
caps := strings.ToUpper(nodots)
return "__" + caps + "_"
}
func genGuard(fpath, author string) string {
b := &bytes.Buffer{}
fname := path.Base(fpath)
fnameNoExt := strings.Replace(fname, path.Ext(fname), "", -1)
guardName := guardFromPath(fpath)
if author == "" {
author = "[ your name here ]"
} else {
author = strings.Trim(author, " \n")
}
fmt.Fprintln(b)
fmt.Fprintf(b, "/** @file %s\n", fname)
fmt.Fprintf(b, " * @brief Function prototypes for %s.\n", fnameNoExt)
fmt.Fprintf(b, " *\n")
fmt.Fprintf(b, " * @author %s\n", author)
fmt.Fprintf(b, " */\n")
fmt.Fprintf(b, "\n")
fmt.Fprintf(b, "#ifndef %s\n", guardName)
fmt.Fprintf(b, "#define %s\n", guardName)
fmt.Fprintf(b, "\n")
fmt.Fprintf(b, "#endif\n")
return string(b.Bytes())
}
func fail(format string, params ...interface{}) {
fmt.Printf("FAIL: "+format+"\n", params...)
os.Exit(-1)
}
func usage(format string, params ...interface{}) {
fmt.Printf(format+"\n", params...)
fmt.Printf("usage: %s [headerfile]\n", os.Args[0])
os.Exit(0)
}
func main() {
if len(os.Args) != 2 {
usage("You must supply a filename to create")
}
dstPath := os.Args[1]
if _, err := os.Stat(dstPath); err == nil {
fail("file %s already exists", dstPath)
}
absPath, err := filepath.Abs(dstPath)
if err != nil {
fail("Couldn't resolve absolute path of %s", absPath)
}
relPath, author, err := buildName(absPath)
if err != nil {
fail("Error buidling the relative path: %v", err)
}
sGuard := genGuard(relPath, author)
if err := ioutil.WriteFile(dstPath, []byte(sGuard), 0644); err != nil {
fail("Error writing the file: %v", err)
}
}