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gmake.go
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gmake.go
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package main
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"os/user"
"strings"
)
const (
GNUMakefile = "GNUMakefile"
Makefile = "Makefile"
makefile = "makefile"
makeSh = "make.sh"
)
var fileToCommand = map[string]string{
GNUMakefile: "make",
Makefile: "make",
makefile: "make",
makeSh: "./make.sh",
}
func main() {
args := os.Args[1:]
cwd, err := os.Getwd()
if err != nil {
// hail mary
execMake(args, cwd, "")
return
}
cu, err := user.Current()
if err != nil {
execMake(args, cwd, "")
return
}
mkDir, fname := findMakefile(cwd, cu.HomeDir)
if mkDir == "" {
execMake(args, cwd, fname)
return
}
execMake(args, mkDir, fname)
return
}
func execMake(args []string, dir, fname string) {
c := fileToCommand[fname]
if c == "" {
c = "make"
}
cmd := exec.Command(c, args...)
cmd.Dir = dir
cmd.Stdin = os.Stdin
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
if err := cmd.Run(); err != nil {
fmt.Println(err)
}
}
func findMakefile(start, end string) (string, string) {
// exit if we've traversed beyond end
if len(start) < len(end) {
return "", ""
}
files, err := ioutil.ReadDir(start)
if err != nil {
return "", ""
}
for _, f := range files {
// ignore all directories
if f.IsDir() {
continue
}
switch f.Name() {
// from: https://www.gnu.org/software/make/manual/html_node/Makefile-Names.html
case GNUMakefile:
return start, GNUMakefile
case Makefile:
return start, Makefile
case makefile:
return start, makefile
case makeSh:
return start, makeSh
}
}
idx := strings.LastIndex(start, string(os.PathSeparator))
// be defensive
if idx == -1 {
return "", ""
}
return findMakefile(start[:idx], end)
}