106 lines
2.0 KiB
Go
106 lines
2.0 KiB
Go
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package lintcmd
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"strings"
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"unicode"
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)
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type parseBuildConfigError struct {
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line int
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err error
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}
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func (err parseBuildConfigError) Error() string { return err.err.Error() }
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func parseBuildConfigs(r io.Reader) ([]BuildConfig, error) {
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var builds []BuildConfig
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br := bufio.NewReader(r)
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i := 0
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for {
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line, err := br.ReadString('\n')
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if err != nil {
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if err == io.EOF {
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break
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} else {
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return nil, err
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}
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}
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line = strings.TrimSpace(line)
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if line == "" {
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continue
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}
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name, envs, flags, err := parseBuildConfig(line)
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if err != nil {
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return nil, parseBuildConfigError{line: i + 1, err: err}
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}
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bc := BuildConfig{
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Name: name,
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Envs: envs,
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Flags: flags,
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}
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builds = append(builds, bc)
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i++
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}
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return builds, nil
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}
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func parseBuildConfig(line string) (name string, envs []string, flags []string, err error) {
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if line == "" {
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return "", nil, nil, errors.New("couldn't parse empty build config")
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}
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if strings.Index(line, ":") == len(line)-1 {
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name = line[:len(line)-1]
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} else {
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idx := strings.Index(line, ": ")
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if idx == -1 {
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return name, envs, flags, errors.New("missing build name")
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}
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name = line[:idx]
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var buf []rune
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var inQuote bool
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args := &envs
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for _, r := range strings.TrimSpace(line[idx+2:]) {
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switch r {
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case ' ':
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if inQuote {
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buf = append(buf, r)
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} else if len(buf) != 0 {
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if buf[0] == '-' {
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args = &flags
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}
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*args = append(*args, string(buf))
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buf = buf[:0]
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}
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case '"':
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inQuote = !inQuote
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default:
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buf = append(buf, r)
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}
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}
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if len(buf) > 0 {
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if inQuote {
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return "", nil, nil, errors.New("unterminated quoted string")
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}
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if buf[0] == '-' {
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args = &flags
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}
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*args = append(*args, string(buf))
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}
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}
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for _, r := range name {
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if !(r == '_' || unicode.IsLetter(r) || unicode.IsNumber(r)) {
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return "", nil, nil, fmt.Errorf("invalid build name %q", name)
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}
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}
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return name, envs, flags, nil
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}
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