lang.go

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

     1  /* Copyright 2022 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  
    16  // Package test_filegroup_with_config generates an "all_files" filegroup target
    17  // in each package. This target globs files in the same package and
    18  // depends on subpackages.
    19  //
    20  // These rules are used for testing with go_bazel_test.
    21  //
    22  // This extension is experimental and subject to change. It is not included
    23  // in the default Gazelle binary.
    24  package test_loads_from_flag
    25  
    26  import (
    27  	"flag"
    28  	"fmt"
    29  	"github.com/bazelbuild/bazel-gazelle/config"
    30  	"github.com/bazelbuild/bazel-gazelle/language"
    31  	"github.com/bazelbuild/bazel-gazelle/rule"
    32  	"strings"
    33  )
    34  
    35  const testLoadsFromFlagName = "test_loads_from_flag"
    36  
    37  type testLoadsFromFlag struct {
    38  	language.BaseLang
    39  
    40  	load Load
    41  }
    42  
    43  func NewLanguage() language.Language {
    44  	return &testLoadsFromFlag{}
    45  }
    46  
    47  func (l *testLoadsFromFlag) RegisterFlags(fs *flag.FlagSet, cmd string, c *config.Config) {
    48  	fs.Var(&l.load, "custom-load", "repo,symbol")
    49  }
    50  
    51  func (l *testLoadsFromFlag) CheckFlags(fs *flag.FlagSet, c *config.Config) error {
    52  	c.Exts[testLoadsFromFlagName] = l.load
    53  	return nil
    54  }
    55  
    56  func (*testLoadsFromFlag) Name() string { return testLoadsFromFlagName }
    57  
    58  func (l *testLoadsFromFlag) Kinds() map[string]rule.KindInfo {
    59  	return map[string]rule.KindInfo{
    60  		l.load.symbol: {},
    61  	}
    62  }
    63  
    64  func (l *testLoadsFromFlag) Loads() []rule.LoadInfo {
    65  	return []rule.LoadInfo{
    66  		{
    67  			Name:    l.load.from,
    68  			Symbols: []string{l.load.symbol},
    69  		},
    70  	}
    71  }
    72  
    73  func (*testLoadsFromFlag) GenerateRules(args language.GenerateArgs) language.GenerateResult {
    74  	load := args.Config.Exts[testLoadsFromFlagName].(Load)
    75  	r := rule.NewRule(load.symbol, "gen")
    76  	return language.GenerateResult{
    77  		Gen:     []*rule.Rule{r},
    78  		Imports: []interface{}{nil},
    79  	}
    80  }
    81  
    82  type Load struct {
    83  	from   string
    84  	symbol string
    85  }
    86  
    87  func (l *Load) Set(value string) error {
    88  	parts := strings.Split(value, ",")
    89  	if len(parts) != 2 {
    90  		return fmt.Errorf("want exactly one comma")
    91  	}
    92  	l.from = parts[0]
    93  	l.symbol = parts[1]
    94  	return nil
    95  }
    96  
    97  func (l *Load) String() string {
    98  	return fmt.Sprintf("load(%q, %q)", l.from, l.symbol)
    99  }
   100
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