99 lines
2.3 KiB
Go
99 lines
2.3 KiB
Go
// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"flag"
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"fmt"
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"go.starlark.net/starlark"
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"os"
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"rbcrun"
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"strings"
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)
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var (
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execprog = flag.String("c", "", "execute program `prog`")
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rootdir = flag.String("d", ".", "the value of // for load paths")
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file = flag.String("f", "", "file to execute")
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perfFile = flag.String("perf", "", "save performance data")
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)
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func main() {
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flag.Parse()
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filename := *file
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var src interface{}
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var env []string
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rc := 0
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for _, arg := range flag.Args() {
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if strings.Contains(arg, "=") {
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env = append(env, arg)
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} else if filename == "" {
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filename = arg
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} else {
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quit("only one file can be executed\n")
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}
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}
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if *execprog != "" {
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if filename != "" {
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quit("either -c or file name should be present\n")
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}
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filename = "<cmdline>"
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src = *execprog
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}
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if filename == "" {
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if len(env) > 0 {
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fmt.Fprintln(os.Stderr,
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"no file to run -- if your file's name contains '=', use -f to specify it")
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}
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flag.Usage()
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os.Exit(1)
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}
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if stat, err := os.Stat(*rootdir); os.IsNotExist(err) || !stat.IsDir() {
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quit("%s is not a directory\n", *rootdir)
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}
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if *perfFile != "" {
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pprof, err := os.Create(*perfFile)
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if err != nil {
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quit("%s: err", *perfFile)
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}
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defer pprof.Close()
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if err := starlark.StartProfile(pprof); err != nil {
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quit("%s\n", err)
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}
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}
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rbcrun.LoadPathRoot = *rootdir
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err := rbcrun.Run(filename, src, env)
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if *perfFile != "" {
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if err2 := starlark.StopProfile(); err2 != nil {
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fmt.Fprintln(os.Stderr, err2)
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rc = 1
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}
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}
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if err != nil {
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if evalErr, ok := err.(*starlark.EvalError); ok {
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quit("%s\n", evalErr.Backtrace())
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} else {
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quit("%s\n", err)
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}
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}
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os.Exit(rc)
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}
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func quit(format string, s ...interface{}) {
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fmt.Fprintf(os.Stderr, format, s...)
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os.Exit(2)
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}
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