mirror of https://github.com/go-gitea/gitea.git
76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package buildutil
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// This logic was copied from stringsFlag from $GOROOT/src/cmd/go/build.go.
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import "fmt"
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const TagsFlagDoc = "a list of `build tags` to consider satisfied during the build. " +
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"For more information about build tags, see the description of " +
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"build constraints in the documentation for the go/build package"
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// TagsFlag is an implementation of the flag.Value and flag.Getter interfaces that parses
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// a flag value in the same manner as go build's -tags flag and
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// populates a []string slice.
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//
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// See $GOROOT/src/go/build/doc.go for description of build tags.
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// See $GOROOT/src/cmd/go/doc.go for description of 'go build -tags' flag.
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//
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// Example:
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// flag.Var((*buildutil.TagsFlag)(&build.Default.BuildTags), "tags", buildutil.TagsFlagDoc)
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type TagsFlag []string
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func (v *TagsFlag) Set(s string) error {
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var err error
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*v, err = splitQuotedFields(s)
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if *v == nil {
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*v = []string{}
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}
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return err
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}
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func (v *TagsFlag) Get() interface{} { return *v }
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func splitQuotedFields(s string) ([]string, error) {
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// Split fields allowing '' or "" around elements.
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// Quotes further inside the string do not count.
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var f []string
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for len(s) > 0 {
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for len(s) > 0 && isSpaceByte(s[0]) {
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s = s[1:]
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}
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if len(s) == 0 {
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break
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}
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// Accepted quoted string. No unescaping inside.
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if s[0] == '"' || s[0] == '\'' {
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quote := s[0]
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s = s[1:]
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i := 0
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for i < len(s) && s[i] != quote {
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i++
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}
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if i >= len(s) {
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return nil, fmt.Errorf("unterminated %c string", quote)
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}
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f = append(f, s[:i])
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s = s[i+1:]
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continue
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}
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i := 0
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for i < len(s) && !isSpaceByte(s[i]) {
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i++
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}
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f = append(f, s[:i])
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s = s[i:]
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}
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return f, nil
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}
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func (v *TagsFlag) String() string {
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return "<tagsFlag>"
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}
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func isSpaceByte(c byte) bool {
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return c == ' ' || c == '\t' || c == '\n' || c == '\r'
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}
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