go-clang-compdb: first import

Author: sbinet

go-clang-compdb/main.go

@@ -0,0 +1,61 @@
+// go-clang-compdb dumps the content of a CLang compilation database
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	clang "github.com/sbinet/go-clang"
+)
+
+func main() {
+	if len(os.Args) <= 1 {
+		fmt.Printf("**error: you need to give a directory containing a 'compile_commands.json' file\n")
+		os.Exit(1)
+	}
+	dir := os.ExpandEnv(os.Args[1])
+	fmt.Printf(":: inspecting [%s]...\n", dir)
+
+	fname := filepath.Join(dir, "compile_commands.json")
+	f, err := os.Open(fname)
+	if err != nil {
+		fmt.Printf("**error: could not open file [%s]: %v\n", fname, err)
+		os.Exit(1)
+	}
+	f.Close()
+
+	db, err := clang.NewCompilationDatabase(dir)
+	if err != nil {
+		fmt.Printf("**error: could not open compilation database at [%s]: %v\n", dir, err)
+		os.Exit(1)
+	}
+	defer db.Dispose()
+
+	cmds := db.GetAllCompileCommands()
+	ncmds := cmds.GetSize()
+	fmt.Printf(":: got %d compile commands\n", ncmds)
+	for i := 0; i < ncmds; i++ {
+		cmd := cmds.GetCommand(i)
+		fmt.Printf("::  --- cmd=%d ---\n", i)
+		fmt.Printf("::  dir= %q\n", cmd.GetDirectory())
+		nargs := cmd.GetNumArgs()
+		fmt.Printf("::  nargs= %d\n", nargs)
+		sargs := make([]string, 0, nargs)
+		for iarg := 0; iarg < nargs; iarg++ {
+			arg := cmd.GetArg(iarg)
+			sfmt := "%q, "
+			if iarg+1 == nargs {
+				sfmt = "%q"
+			}
+			sargs = append(sargs, fmt.Sprintf(sfmt, arg))
+
+		}
+		fmt.Printf("::  args= {%s}\n", strings.Join(sargs, ""))
+		if i+1 != ncmds {
+			fmt.Printf("::\n")
+		}
+	}
+	fmt.Printf(":: inspecting [%s]... [done]\n", dir)
+}