github.com/ajguerrer/rules_go@v0.20.3/go/tools/builders/info.go (about) 1 // Copyright 2017 The Bazel Authors. All rights reserved. 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 // info prints debugging information about the go environment. 16 // It is used to help examine the execution environment of rules_go 17 package main 18 19 import ( 20 "flag" 21 "fmt" 22 "log" 23 "os" 24 ) 25 26 func run(args []string) error { 27 args, err := readParamsFiles(args) 28 if err != nil { 29 return err 30 } 31 filename := "" 32 flags := flag.NewFlagSet("info", flag.ExitOnError) 33 flags.StringVar(&filename, "out", filename, "The file to write the report to") 34 goenv := envFlags(flags) 35 if err := flags.Parse(args); err != nil { 36 return err 37 } 38 if err := goenv.checkFlags(); err != nil { 39 return err 40 } 41 f := os.Stderr 42 if filename != "" { 43 var err error 44 f, err = os.Create(filename) 45 if err != nil { 46 return fmt.Errorf("Could not create report file: %v", err) 47 } 48 defer f.Close() 49 } 50 if err := goenv.runCommandToFile(f, goenv.goCmd("version")); err != nil { 51 return err 52 } 53 if err := goenv.runCommandToFile(f, goenv.goCmd("env")); err != nil { 54 return err 55 } 56 return nil 57 } 58 59 func main() { 60 if err := run(os.Args[1:]); err != nil { 61 log.Fatal(err) 62 } 63 }