Fix tests to pass on linux

scheduler/scheduler.go

@@ -1,9 +1,14 @@
 package scheduler
 
 import (
+	"bytes"
+	"errors"
 	"fmt"
+	"io/ioutil"
 	"local/firestormy/config"
 	"local/firestormy/logger"
+	"regexp"
+	"strings"
 	"time"
 
 	cron "github.com/robfig/cron/v3"
@@ -30,6 +35,61 @@ func New() *Scheduler {
 	}
 }
 
+func NewFromFile(config string) (*Scheduler, error) {
+	f, err := ioutil.ReadFile(config)
+	if err != nil {
+		return nil, err
+	}
+	s := New()
+	for _, line := range bytes.Split(f, []byte("\n")) {
+		line = cleanLine(line)
+		if len(line) == 0 {
+			continue
+		}
+		schedule, command := splitScheduleCommand(line)
+		if len(schedule) == 0 || len(command) == 0 {
+			continue
+		}
+		job, err := NewJob(Bash, schedule, command)
+		if err != nil {
+			logger.New().Error(err, "cannot fully parse file: new job error", config, ", sched", schedule, ", comm", command)
+			continue
+		}
+		if err := s.Add(job); err != nil {
+			logger.New().Error(err, "cannot fully parse file: add job error", config)
+			continue
+		}
+	}
+	jobs, _ := s.List()
+	if len(jobs) == 0 {
+		return nil, errors.New("no jobs parsed from file " + config)
+	}
+	return s, nil
+}
+
+func cleanLine(b []byte) []byte {
+	b = bytes.Trim(b, "\t \n")
+	if len(b) == 0 {
+		return nil
+	}
+	if b[0] == '#' {
+		return nil
+	}
+	return b
+}
+
+func splitScheduleCommand(b []byte) (string, string) {
+	re := regexp.MustCompile(`^((\d+|\*\/\d+|(\d,)*\d+|\*) [ ]*){5}`)
+	schedule := string(re.Find(b))
+	if len(schedule) == 0 {
+		return "", ""
+	}
+	command := strings.TrimPrefix(string(b), schedule)
+	schedule = strings.TrimSpace(schedule)
+	command = strings.TrimSpace(command)
+	return schedule, command
+}
+
 func (s *Scheduler) Start() error {
 	jobs, err := s.List()
 	if err != nil {