github.com/galaxyobe/gen@v0.0.0-20220910125335-392fa8f0990f/pkg/custom_args/args.go (about)

     1  /*
     2   Copyright 2022 Galaxyobe.
     3  
     4   Licensed under the Apache License, Version 2.0 (the "License");
     5   you may not use this file except in compliance with the License.
     6   You may obtain a copy of the License at
     7  
     8       http://www.apache.org/licenses/LICENSE-2.0
     9  
    10   Unless required by applicable law or agreed to in writing, software
    11   distributed under the License is distributed on an "AS IS" BASIS,
    12   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   See the License for the specific language governing permissions and
    14   limitations under the License.
    15  */
    16  
    17  package custom_args
    18  
    19  import (
    20  	"fmt"
    21  	"strings"
    22  
    23  	"github.com/spf13/pflag"
    24  	"k8s.io/gengo/args"
    25  
    26  	"github.com/galaxyobe/gen/third_party/gengo/parser"
    27  )
    28  
    29  // CustomArgs is used tby the go2idl framework to pass custom_args specific to this
    30  // generator.
    31  type CustomArgs struct {
    32  	*args.GeneratorArgs
    33  	BoundingDirs    []string // Only deal with types rooted under these dirs.
    34  	TrimPackagePath string   // If specified, trim the path from PackagePath before writing files.
    35  }
    36  
    37  func NewCustomArgs(args *args.GeneratorArgs) *CustomArgs {
    38  	customArgs := &CustomArgs{
    39  		GeneratorArgs: args,
    40  	}
    41  	args.CustomArgs = customArgs
    42  	return customArgs
    43  }
    44  
    45  func (a *CustomArgs) AddFlags(fs *pflag.FlagSet) {
    46  	fs.StringSliceVar(&a.BoundingDirs, "bounding-dirs", a.BoundingDirs,
    47  		"Comma-separated list of import paths which bound the types for which deep-copies will be generated.")
    48  	fs.StringVar(&a.TrimPackagePath, "trim-package-path", a.TrimPackagePath,
    49  		"If set, trim the specified path from PackagePath when generating files.")
    50  }
    51  
    52  // NewBuilder makes a new parser.Builder and populates it with the input
    53  // directories.
    54  func (a *CustomArgs) NewBuilder() (*parser.Builder, error) {
    55  	b := parser.New()
    56  
    57  	// flag for including *_test.go
    58  	b.IncludeTestFiles = a.IncludeTestFiles
    59  
    60  	// Ignore all auto-generated files.
    61  	b.AddBuildTags(a.GeneratedBuildTag)
    62  
    63  	for _, d := range a.InputDirs {
    64  		var err error
    65  		if strings.HasSuffix(d, "/...") {
    66  			err = b.AddDirRecursive(strings.TrimSuffix(d, "/..."))
    67  		} else {
    68  			err = b.AddDir(d)
    69  		}
    70  		if err != nil {
    71  			return nil, fmt.Errorf("unable to add directory %q: %v", d, err)
    72  		}
    73  	}
    74  	return b, nil
    75  }