84 lines
3.2 KiB
Go
84 lines
3.2 KiB
Go
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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package args
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import (
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"fmt"
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"github.com/spf13/pflag"
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"k8s.io/gengo/args"
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)
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// DefaultBasePeerDirs are the peer-dirs nearly everybody will use, i.e. those coming from
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// apimachinery.
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var DefaultBasePeerDirs = []string{
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"k8s.io/apimachinery/pkg/apis/meta/v1",
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"k8s.io/apimachinery/pkg/conversion",
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"k8s.io/apimachinery/pkg/runtime",
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}
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// CustomArgs is used by the gengo framework to pass args specific to this generator.
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type CustomArgs struct {
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// Base peer dirs which nearly everybody will use, i.e. outside of Kubernetes core. Peer dirs
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// are declared to make the generator pick up manually written conversion funcs from external
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// packages.
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BasePeerDirs []string
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// Custom peer dirs which are application specific. Peer dirs are declared to make the
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// generator pick up manually written conversion funcs from external packages.
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ExtraPeerDirs []string
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// SkipUnsafe indicates whether to generate unsafe conversions to improve the efficiency
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// of these operations. The unsafe operation is a direct pointer assignment via unsafe
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// (within the allowed uses of unsafe) and is equivalent to a proposed Golang change to
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// allow structs that are identical to be assigned to each other.
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SkipUnsafe bool
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}
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// NewDefaults returns default arguments for the generator.
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func NewDefaults() (*args.GeneratorArgs, *CustomArgs) {
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genericArgs := args.Default().WithoutDefaultFlagParsing()
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customArgs := &CustomArgs{
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BasePeerDirs: DefaultBasePeerDirs,
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SkipUnsafe: false,
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}
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genericArgs.CustomArgs = customArgs
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genericArgs.OutputFileBaseName = "conversion_generated"
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return genericArgs, customArgs
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}
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// AddFlags add the generator flags to the flag set.
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func (ca *CustomArgs) AddFlags(fs *pflag.FlagSet) {
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pflag.CommandLine.StringSliceVar(&ca.BasePeerDirs, "base-peer-dirs", ca.BasePeerDirs,
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"Comma-separated list of apimachinery import paths which are considered, after tag-specified peers, for conversions. Only change these if you have very good reasons.")
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pflag.CommandLine.StringSliceVar(&ca.ExtraPeerDirs, "extra-peer-dirs", ca.ExtraPeerDirs,
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"Application specific comma-separated list of import paths which are considered, after tag-specified peers and base-peer-dirs, for conversions.")
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pflag.CommandLine.BoolVar(&ca.SkipUnsafe, "skip-unsafe", ca.SkipUnsafe,
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"If true, will not generate code using unsafe pointer conversions; resulting code may be slower.")
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}
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// Validate checks the given arguments.
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func Validate(genericArgs *args.GeneratorArgs) error {
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_ = genericArgs.CustomArgs.(*CustomArgs)
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if len(genericArgs.OutputFileBaseName) == 0 {
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return fmt.Errorf("output file base name cannot be empty")
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}
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return nil
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}
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