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Copy pathconfig.go
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105 lines (95 loc) · 1.97 KB
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package lintcmd
import (
"bufio"
"errors"
"fmt"
"io"
"strings"
"unicode"
)
type parseBuildConfigError struct {
line int
err error
}
func (err parseBuildConfigError) Error() string { return err.err.Error() }
func parseBuildConfigs(r io.Reader) ([]buildConfig, error) {
var builds []buildConfig
br := bufio.NewReader(r)
i := 0
for {
line, err := br.ReadString('\n')
if err != nil {
if err == io.EOF {
break
} else {
return nil, err
}
}
line = strings.TrimSpace(line)
if line == "" {
continue
}
name, envs, flags, err := parseBuildConfig(line)
if err != nil {
return nil, parseBuildConfigError{line: i + 1, err: err}
}
bc := buildConfig{
Name: name,
Envs: envs,
Flags: flags,
}
builds = append(builds, bc)
i++
}
return builds, nil
}
func parseBuildConfig(line string) (name string, envs []string, flags []string, err error) {
if line == "" {
return "", nil, nil, errors.New("couldn't parse empty build config")
}
if strings.Index(line, ":") == len(line)-1 {
name = line[:len(line)-1]
} else {
before, after, ok := strings.Cut(line, ": ")
if !ok {
return name, envs, flags, errors.New("missing build name")
}
name = before
var buf []rune
var inQuote bool
args := &envs
for _, r := range strings.TrimSpace(after) {
switch r {
case ' ':
if inQuote {
buf = append(buf, r)
} else if len(buf) != 0 {
if buf[0] == '-' {
args = &flags
}
*args = append(*args, string(buf))
buf = buf[:0]
}
case '"':
inQuote = !inQuote
default:
buf = append(buf, r)
}
}
if len(buf) > 0 {
if inQuote {
return "", nil, nil, errors.New("unterminated quoted string")
}
if buf[0] == '-' {
args = &flags
}
*args = append(*args, string(buf))
}
}
for _, r := range name {
if !(r == '_' || unicode.IsLetter(r) || unicode.IsNumber(r)) {
return "", nil, nil, fmt.Errorf("invalid build name %q", name)
}
}
return name, envs, flags, nil
}