Source file src/github.com/bazelbuild/bazel-gazelle/internal/list_repository_tools_srcs.go

Documentation: github.com/bazelbuild/bazel-gazelle/internal

     1  //go:build ignore
     2  // +build ignore
     3  
     4  // Copyright 2014 The Bazel Authors. All rights reserved.
     5  //
     6  // Licensed under the Apache License, Version 2.0 (the "License");
     7  // you may not use this file except in compliance with the License.
     8  // You may obtain a copy of the License at
     9  //
    10  //    http://www.apache.org/licenses/LICENSE-2.0
    11  //
    12  // Unless required by applicable law or agreed to in writing, software
    13  // distributed under the License is distributed on an "AS IS" BASIS,
    14  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15  // See the License for the specific language governing permissions and
    16  // limitations under the License.
    17  
    18  // list_go_repository_tools prints Bazel labels for source files that
    19  // gazelle and fetch_repo depend on. go_repository_tools resolves these
    20  // labels so that when a source file changes, the gazelle and fetch_repo
    21  // binaries are rebuilt for go_repository.
    22  
    23  package main
    24  
    25  import (
    26  	"bytes"
    27  	"flag"
    28  	"fmt"
    29  	"log"
    30  	"os"
    31  	"path/filepath"
    32  	"strings"
    33  )
    34  
    35  func main() {
    36  	dir := flag.String("dir", "", "directory to run in")
    37  	check := flag.String("check", "", ".bzl file to check (relative to gazelle root)")
    38  	generate := flag.String("generate", "", ".bzl file to generate (relative to gazelle root)")
    39  	flag.Parse()
    40  	if *check == "" && *generate == "" {
    41  		log.Fatal("neither -check nor -generate were set")
    42  	}
    43  	if *check != "" && *generate != "" {
    44  		log.Fatal("both -check and -generate were set")
    45  	}
    46  	if *dir != "" {
    47  		if err := os.Chdir(filepath.FromSlash(*dir)); err != nil {
    48  			log.Fatal(err)
    49  		}
    50  	}
    51  	if *check != "" {
    52  		*check = filepath.FromSlash(*check)
    53  	}
    54  	if *generate != "" {
    55  		*generate = filepath.FromSlash(*generate)
    56  	}
    57  
    58  	var labels []string
    59  	err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
    60  		if err != nil {
    61  			return err
    62  		}
    63  
    64  		// Skip the tests directory since there is nothing that should be imported from there.
    65  		if strings.HasPrefix(path, "tests/") {
    66  			return filepath.SkipDir
    67  		}
    68  
    69  		base := filepath.Base(path)
    70  		if base == "bcr_tests" || base == "docs" || base == "vendor" || base == "third_party" || base == "testdata" || base == ".ijwb" {
    71  			return filepath.SkipDir
    72  		}
    73  		if !info.IsDir() &&
    74  			(strings.HasSuffix(base, ".go") && !strings.HasSuffix(base, "_test.go") ||
    75  				base == "BUILD.bazel" || base == "BUILD") {
    76  			label := filepath.ToSlash(path)
    77  			if i := strings.LastIndexByte(label, '/'); i >= 0 {
    78  				label = fmt.Sprintf(`Label("//%s:%s")`, label[:i], label[i+1:])
    79  			} else {
    80  				label = fmt.Sprintf(`Label("//:%s")`, label)
    81  			}
    82  			labels = append(labels, label)
    83  		}
    84  		return nil
    85  	})
    86  	if err != nil {
    87  		log.Fatal(err)
    88  	}
    89  
    90  	buf := &bytes.Buffer{}
    91  	fmt.Fprintln(buf, "# Code generated by list_repository_tools_srcs.go; DO NOT EDIT.")
    92  	fmt.Fprintln(buf, "# regenerate with `go run internal/list_repository_tools_srcs.go -dir $PWD -generate internal/go_repository_tools_srcs.bzl`")
    93  	fmt.Fprintln(buf, "GO_REPOSITORY_TOOLS_SRCS = [")
    94  	for _, label := range labels {
    95  		fmt.Fprintf(buf, "    %s,\n", label)
    96  	}
    97  	fmt.Fprintln(buf, "]")
    98  
    99  	if *generate != "" {
   100  		if err := os.WriteFile(*generate, buf.Bytes(), 0o666); err != nil {
   101  			log.Fatal(err)
   102  		}
   103  	} else {
   104  		got, err := os.ReadFile(*check)
   105  		if err != nil {
   106  			log.Fatal(err)
   107  		}
   108  		if !bytes.Equal(got, buf.Bytes()) {
   109  			log.Fatalf("generated file %s is not up to date", *check)
   110  		}
   111  	}
   112  }
   113  

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