117 lines
2.7 KiB
Go
117 lines
2.7 KiB
Go
package flag
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import (
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"flag"
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"os"
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"path/filepath"
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"github.com/qiniu/goc/v2/pkg/config"
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"github.com/qiniu/goc/v2/pkg/log"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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var buildUsage string = `Usage:
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goc build [-o output] [build flags] [packages] [goc flags]
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The [goc flags] can be placed in anywhere in the command line.
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However, other flags' order are same with the go official command.
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`
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// BuildCmdArgsParse parse both go flags and goc flags, it rewrite go flags if
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// necessary, and returns all non-flag arguments.
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//
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// 吞下 [packages] 之前所有的 flags.
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func BuildCmdArgsParse(cmd *cobra.Command, args []string) []string {
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// 首先解析 cobra 定义的 flag
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allFlagSets := cmd.Flags()
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// 因为 args 里面含有 go 的 flag，所以需要忽略解析 go flag 的错误
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allFlagSets.Init("GOC", pflag.ContinueOnError)
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allFlagSets.Parse(args)
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// 重写 help
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helpFlag := allFlagSets.Lookup("help")
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if helpFlag.Changed {
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printHelp(buildUsage, cmd)
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}
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// 删除 help flag
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args = findAndDelHelpFlag(args)
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// 必须手动调用
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// 由于关闭了 cobra 的 flag parse，root PersistentPreRun 调用时，log.NewLogger 并没有拿到 debug 值
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log.NewLogger()
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// 删除 cobra 定义的 flag
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allFlagSets.Visit(func(f *pflag.Flag) {
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args = findAndDelGocFlag(args, f.Name)
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})
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// 然后解析 go 的 flag
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goFlagSets := flag.NewFlagSet("GO", flag.ContinueOnError)
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addBuildFlags(goFlagSets)
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addOutputFlags(goFlagSets)
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err := goFlagSets.Parse(args)
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if err != nil {
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log.Fatalf("%v", err)
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}
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// 找出设置的 go flag
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curWd, err := os.Getwd()
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if err != nil {
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log.Fatalf("fail to get current working directory: %v", err)
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}
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config.GocConfig.CurWd = curWd
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flags := make([]string, 0)
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goFlagSets.Visit(func(f *flag.Flag) {
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// 将用户指定 -o 改成绝对目录
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if f.Name == "o" {
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outputDir := f.Value.String()
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outputDir, err := filepath.Abs(outputDir)
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if err != nil {
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log.Fatalf("output flag is not valid: %v", err)
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}
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flags = append(flags, "-o", outputDir)
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} else {
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flags = append(flags, "-"+f.Name, f.Value.String())
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}
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})
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config.GocConfig.Goflags = flags
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return goFlagSets.Args()
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}
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func findAndDelGocFlag(a []string, x string) []string {
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new := make([]string, 0, len(a))
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x = "--" + x
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for i := 0; i < len(a); i++ {
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if a[i] == "--debug" {
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// debug 是 bool，就一个元素
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continue
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} else if a[i] == x {
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// 其他 goc flag 都是两个元素
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i++
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continue
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} else {
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// 剩下的是 go flag
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new = append(new, a[i])
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}
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}
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return new
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}
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func findAndDelHelpFlag(a []string) []string {
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new := make([]string, 0, len(a))
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for _, v := range a {
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if v == "--help" || v == "-h" {
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continue
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} else {
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new = append(new, v)
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}
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}
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return new
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}
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