forked from vieter-v/vieter
Started writing cron expression parser [CI SKIP]
parent
e890128bda
commit
6d60ea1538
4
Makefile
4
Makefile
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@ -60,6 +60,10 @@ fmt:
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vet:
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$(V) vet -W $(SRC_DIR)
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.PHONY: test
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test:
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$(V) test $(SRC_DIR)
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# Build & patch the V compiler
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.PHONY: v
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v: v/v
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@ -1,7 +1,32 @@
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module cron
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import git
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import datatypes
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import time
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struct ScheduledBuild {
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repo git.GitRepo
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timestamp time.Time
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}
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fn (r1 ScheduledBuild) < (r2 ScheduledBuild) bool {
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return r1.timestamp < r2.timestamp
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}
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pub fn cron(conf Config) ? {
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repos_map := git.get_repos(conf.address, conf.api_key) ?
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// mut queue := datatypes.MinHeap<ScheduledBuild>{}
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// repos_map := git.get_repos(conf.address, conf.api_key) ?
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// for _, repo in repos_map {
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// scheduled := ScheduledBuild{
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// repo: repo
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// timestamp: 25
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// }
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// queue.insert(scheduled)
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// }
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// println(queue)
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exp := "10/2 5 *"
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println(parse_expression(exp) ?)
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}
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@ -0,0 +1,55 @@
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module cron
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import math
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struct CronExpression {
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minutes []u32
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hours []u32
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days []u32
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}
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// parse_range parses a given string into a range of integers, if possible.
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fn parse_range(s string, min u32, max u32) ?[]u32 {
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mut out := []u32{}
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mut start := min
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mut interval := u32(1)
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if s != '*' {
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exps := s.split('/')
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if exps.len > 1 {
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interval = exps[1].u32()
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}
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// Here, s solely consists of a number, so that's the only value we
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// should return.
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else{
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return [exps[0].u32()]
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}
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if exps[0] != '*' {
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start = math.max(exps[0].u32(), min)
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}
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}
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for start <= max {
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out << start
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start += interval
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}
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return out
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}
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// min hour day month day-of-week
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fn parse_expression(exp string) ?CronExpression {
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parts := exp.split(' ')
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if parts.len != 3 {
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return error("Expression must contain 5 space-separated parts.")
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}
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return CronExpression{
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minutes: parse_range(parts[0], 0, 59) ?
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hours: parse_range(parts[1], 0, 23) ?
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days: parse_range(parts[2], 0, 31) ?
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}
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}
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@ -0,0 +1,5 @@
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module cron
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fn test_parse_star_range() {
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assert parse_range('*', 0, 5) == [0, 1, 2, 3, 4, 5]
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}
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@ -44,6 +44,7 @@ pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ? {
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for to_write > 0 {
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// TODO don't just loop infinitely here
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bytes_written := file.write(buf[bytes_read - to_write..bytes_read]) or { continue }
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// file.flush()
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to_write = to_write - bytes_written
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}
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