feat: add scheduling configuration for prebuilds #408
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| package helpers | ||
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| import ( | ||
| "strconv" | ||
| "strings" | ||
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| "golang.org/x/xerrors" | ||
| ) | ||
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| // ValidateSchedules checks if any schedules overlap | ||
| func ValidateSchedules(schedules []string) error { | ||
| for i := 0; i < len(schedules); i++ { | ||
| for j := i + 1; j < len(schedules); j++ { | ||
| overlap, err := SchedulesOverlap(schedules[i], schedules[j]) | ||
| if err != nil { | ||
| return xerrors.Errorf("invalid schedule: %w", err) | ||
| } | ||
| if overlap { | ||
| return xerrors.Errorf("schedules overlap: %s and %s", | ||
| schedules[i], schedules[j]) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
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| // SchedulesOverlap checks if two schedules overlap by checking | ||
| // days, months, and hours separately | ||
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| func SchedulesOverlap(schedule1, schedule2 string) (bool, error) { | ||
|
There was a problem hiding this comment. This is excellent work @evgeniy-scherbina! I really like how clean the code is, how complete the code-coverage, and how clear the intentions are. |
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| // Get cron fields | ||
| fields1 := strings.Fields(schedule1) | ||
| fields2 := strings.Fields(schedule2) | ||
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| if len(fields1) != 5 { | ||
| return false, xerrors.Errorf("schedule %q has %d fields, expected 5 fields (minute hour day-of-month month day-of-week)", schedule1, len(fields1)) | ||
| } | ||
| if len(fields2) != 5 { | ||
| return false, xerrors.Errorf("schedule %q has %d fields, expected 5 fields (minute hour day-of-month month day-of-week)", schedule2, len(fields2)) | ||
| } | ||
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| // Check if months overlap | ||
| monthsOverlap, err := MonthsOverlap(fields1[3], fields2[3]) | ||
| if err != nil { | ||
| return false, xerrors.Errorf("invalid month range: %w", err) | ||
| } | ||
| if !monthsOverlap { | ||
| return false, nil | ||
| } | ||
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| // Check if days overlap (DOM OR DOW) | ||
| daysOverlap, err := DaysOverlap(fields1[2], fields1[4], fields2[2], fields2[4]) | ||
| if err != nil { | ||
| return false, xerrors.Errorf("invalid day range: %w", err) | ||
| } | ||
| if !daysOverlap { | ||
| return false, nil | ||
| } | ||
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| // Check if hours overlap | ||
| hoursOverlap, err := HoursOverlap(fields1[1], fields2[1]) | ||
| if err != nil { | ||
| return false, xerrors.Errorf("invalid hour range: %w", err) | ||
| } | ||
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| return hoursOverlap, nil | ||
| } | ||
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| // MonthsOverlap checks if two month ranges overlap | ||
| func MonthsOverlap(months1, months2 string) (bool, error) { | ||
| return CheckOverlap(months1, months2, 12) | ||
| } | ||
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| // HoursOverlap checks if two hour ranges overlap | ||
| func HoursOverlap(hours1, hours2 string) (bool, error) { | ||
| return CheckOverlap(hours1, hours2, 23) | ||
| } | ||
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| // DomOverlap checks if two day-of-month ranges overlap | ||
| func DomOverlap(dom1, dom2 string) (bool, error) { | ||
| return CheckOverlap(dom1, dom2, 31) | ||
| } | ||
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| // DowOverlap checks if two day-of-week ranges overlap | ||
| func DowOverlap(dow1, dow2 string) (bool, error) { | ||
| return CheckOverlap(dow1, dow2, 6) | ||
| } | ||
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| // DaysOverlap checks if two day ranges overlap, considering both DOM and DOW. | ||
| // Returns true if both DOM and DOW overlap, or if one is * and the other overlaps. | ||
| func DaysOverlap(dom1, dow1, dom2, dow2 string) (bool, error) { | ||
| // If either DOM is *, we only need to check DOW overlap | ||
| if dom1 == "*" || dom2 == "*" { | ||
| return DowOverlap(dow1, dow2) | ||
| } | ||
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| // If either DOW is *, we only need to check DOM overlap | ||
| if dow1 == "*" || dow2 == "*" { | ||
| return DomOverlap(dom1, dom2) | ||
| } | ||
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| // If both DOM and DOW are specified, we need to check both | ||
| // because the schedule runs when either matches | ||
| domOverlap, err := DomOverlap(dom1, dom2) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| dowOverlap, err := DowOverlap(dow1, dow2) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
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| // If either DOM or DOW overlaps, the schedules overlap | ||
| return domOverlap || dowOverlap, nil | ||
| } | ||
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| // CheckOverlap is a generic function to check if two ranges overlap | ||
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| func CheckOverlap(range1, range2 string, maxValue int) (bool, error) { | ||
| set1, err := ParseRange(range1, maxValue) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| set2, err := ParseRange(range2, maxValue) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
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| for value := range set1 { | ||
| if set2[value] { | ||
| return true, nil | ||
| } | ||
| } | ||
| return false, nil | ||
| } | ||
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| // ParseRange converts a cron range to a set of integers | ||
| // maxValue is the maximum allowed value (e.g., 23 for hours, 6 for DOW, 12 for months, 31 for DOM) | ||
| func ParseRange(input string, maxValue int) (map[int]bool, error) { | ||
| result := make(map[int]bool) | ||
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| // Handle "*" case | ||
| if input == "*" { | ||
| for i := 0; i <= maxValue; i++ { | ||
| result[i] = true | ||
| } | ||
| return result, nil | ||
| } | ||
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| // Parse ranges like "1-3,5,7-9" | ||
| parts := strings.Split(input, ",") | ||
| for _, part := range parts { | ||
| if strings.Contains(part, "-") { | ||
| // Handle range like "1-3" | ||
| rangeParts := strings.Split(part, "-") | ||
| start, err := strconv.Atoi(rangeParts[0]) | ||
| if err != nil { | ||
| return nil, xerrors.Errorf("invalid start value in range: %w", err) | ||
| } | ||
| end, err := strconv.Atoi(rangeParts[1]) | ||
| if err != nil { | ||
| return nil, xerrors.Errorf("invalid end value in range: %w", err) | ||
| } | ||
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| // Validate range | ||
| if start < 0 || end > maxValue || start > end { | ||
| return nil, xerrors.Errorf("invalid range %d-%d: values must be between 0 and %d", start, end, maxValue) | ||
| } | ||
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| for i := start; i <= end; i++ { | ||
| result[i] = true | ||
| } | ||
| } else { | ||
| // Handle single value | ||
| value, err := strconv.Atoi(part) | ||
| if err != nil { | ||
| return nil, xerrors.Errorf("invalid value: %w", err) | ||
| } | ||
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| // Validate value | ||
| if value < 0 || value > maxValue { | ||
| return nil, xerrors.Errorf("invalid value %d: must be between 0 and %d", value, maxValue) | ||
| } | ||
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| result[value] = true | ||
| } | ||
| } | ||
| return result, nil | ||
| } | ||
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This error message could be more helpful. We know which aspect of the schedules overlap, so let's help template authors out by telling them.
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It means everything (minutes, hours and days) overlap.