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