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package main
import (
"bufio"
"fmt"
"io"
"strings"
)
func isAlphaNum(r byte) bool {
switch {
case r >= 'a' && r <= 'z':
case r >= 'A' && r <= 'Z':
case r >= '0' && r <= '9':
case r == '_':
default:
return false
}
return true
}
func Parse(r io.Reader) ([]Task, error) {
s := bufio.NewScanner(r)
var tasks []Task
var t Task
var line int
for s.Scan() {
line++
str := strings.TrimSpace(s.Text())
if str == "" {
t = Task{}
continue
}
if str[0] == '@' {
// parameter
parts := strings.SplitN(str[1:], "=", 2)
switch strings.TrimSpace(parts[0]) {
case "oneshot":
t.OneShot = true
case "watch-file":
if len(parts) != 2 {
return nil, fmt.Errorf("line %d: missing file path for watch-file", line)
}
t.WatchFiles = append(t.WatchFiles, parts[1])
default:
return nil, fmt.Errorf("line %d: invalid option '%s'", line, parts[0])
}
}
if !isAlphaNum(str[0]) {
// comment/ignored
continue
}
parts := strings.SplitN(str, ":", 2)
if len(parts) != 2 {
return nil, fmt.Errorf("line %d: invalid proc definition '%s' (missing ':')", line, parts[0])
}
t.Name = strings.TrimSpace(parts[0])
t.Command = strings.TrimSpace(parts[1])
tasks = append(tasks, t)
t = Task{}
}
return tasks, s.Err()
}
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