Sasha Smundak | 24159db | 2020-10-26 15:43:21 -0700 | [diff] [blame] | 1 | // Copyright 2021 Google LLC |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package main |
| 16 | |
| 17 | import ( |
| 18 | "flag" |
| 19 | "fmt" |
| 20 | "go.starlark.net/starlark" |
| 21 | "os" |
| 22 | "rbcrun" |
| 23 | "strings" |
| 24 | ) |
| 25 | |
| 26 | var ( |
| 27 | execprog = flag.String("c", "", "execute program `prog`") |
| 28 | rootdir = flag.String("d", ".", "the value of // for load paths") |
| 29 | file = flag.String("f", "", "file to execute") |
| 30 | perfFile = flag.String("perf", "", "save performance data") |
| 31 | ) |
| 32 | |
| 33 | func main() { |
| 34 | flag.Parse() |
| 35 | filename := *file |
| 36 | var src interface{} |
| 37 | var env []string |
| 38 | |
| 39 | rc := 0 |
| 40 | for _, arg := range flag.Args() { |
| 41 | if strings.Contains(arg, "=") { |
| 42 | env = append(env, arg) |
| 43 | } else if filename == "" { |
| 44 | filename = arg |
| 45 | } else { |
| 46 | quit("only one file can be executed\n") |
| 47 | } |
| 48 | } |
| 49 | if *execprog != "" { |
| 50 | if filename != "" { |
| 51 | quit("either -c or file name should be present\n") |
| 52 | } |
| 53 | filename = "<cmdline>" |
| 54 | src = *execprog |
| 55 | } |
| 56 | if filename == "" { |
| 57 | if len(env) > 0 { |
| 58 | fmt.Fprintln(os.Stderr, |
| 59 | "no file to run -- if your file's name contains '=', use -f to specify it") |
| 60 | } |
| 61 | flag.Usage() |
| 62 | os.Exit(1) |
| 63 | } |
| 64 | if stat, err := os.Stat(*rootdir); os.IsNotExist(err) || !stat.IsDir() { |
| 65 | quit("%s is not a directory\n", *rootdir) |
| 66 | } |
| 67 | if *perfFile != "" { |
| 68 | pprof, err := os.Create(*perfFile) |
| 69 | if err != nil { |
| 70 | quit("%s: err", *perfFile) |
| 71 | } |
| 72 | defer pprof.Close() |
| 73 | if err := starlark.StartProfile(pprof); err != nil { |
| 74 | quit("%s\n", err) |
| 75 | } |
| 76 | } |
| 77 | rbcrun.LoadPathRoot = *rootdir |
| 78 | err := rbcrun.Run(filename, src, env) |
| 79 | if *perfFile != "" { |
| 80 | if err2 := starlark.StopProfile(); err2 != nil { |
| 81 | fmt.Fprintln(os.Stderr, err2) |
| 82 | rc = 1 |
| 83 | } |
| 84 | } |
| 85 | if err != nil { |
| 86 | if evalErr, ok := err.(*starlark.EvalError); ok { |
| 87 | quit("%s\n", evalErr.Backtrace()) |
| 88 | } else { |
| 89 | quit("%s\n", err) |
| 90 | } |
| 91 | } |
| 92 | os.Exit(rc) |
| 93 | } |
| 94 | |
| 95 | func quit(format string, s ...interface{}) { |
Cole Faust | e95122e | 2021-10-13 12:15:21 -0700 | [diff] [blame] | 96 | fmt.Fprintf(os.Stderr, format, s...) |
Sasha Smundak | 24159db | 2020-10-26 15:43:21 -0700 | [diff] [blame] | 97 | os.Exit(2) |
| 98 | } |