package schedule

import (
	"bufio"
	"os"
	"strings"
)

// readEnvFile parses a KEY=value EnvironmentFile (blank lines and #comments
// ignored). Copied from internal/activator/backend_exec.go's function of the
// same name — importing activator here would be a cycle (activator is a
// consumer of this package's runner), so the ~20-line parser is duplicated
// rather than shared. Keep the two in sync if either changes.
func readEnvFile(path string) (map[string]string, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer f.Close()
	m := map[string]string{}
	sc := bufio.NewScanner(f)
	for sc.Scan() {
		line := strings.TrimSpace(sc.Text())
		if line == "" || strings.HasPrefix(line, "#") {
			continue
		}
		if k, v, ok := strings.Cut(line, "="); ok {
			m[strings.TrimSpace(k)] = strings.TrimSpace(v)
		}
	}
	return m, sc.Err()
}