Refactor Cron and merge dashboard tasks (#10745)

* Refactor Cron and merge dashboard tasks

* Merge Cron and Dashboard tasks
* Make every cron task report a system notice on completion
* Refactor the creation of these tasks
* Ensure that execution counts of tasks is correct
* Allow cron tasks to be started from the cron page

* golangci-lint fixes

* Enforce that only one task with the same name can be registered

Signed-off-by: Andrew Thornton <art27@cantab.net>

* fix name check

Signed-off-by: Andrew Thornton <art27@cantab.net>

* as per @guillep2k

* as per @lafriks

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Add git.CommandContext variants

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/setting/cron.go

@@ -4,129 +4,8 @@
 
 package setting
 
-import (
-	"time"
-
-	"code.gitea.io/gitea/modules/log"
-)
-
-var (
-
-	// Cron tasks
-	Cron = struct {
-		UpdateMirror struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-		} `ini:"cron.update_mirrors"`
-		RepoHealthCheck struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-			Timeout    time.Duration
-			Args       []string `delim:" "`
-		} `ini:"cron.repo_health_check"`
-		CheckRepoStats struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-		} `ini:"cron.check_repo_stats"`
-		ArchiveCleanup struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-			OlderThan  time.Duration
-		} `ini:"cron.archive_cleanup"`
-		SyncExternalUsers struct {
-			Enabled        bool
-			RunAtStart     bool
-			Schedule       string
-			UpdateExisting bool
-		} `ini:"cron.sync_external_users"`
-		DeletedBranchesCleanup struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-			OlderThan  time.Duration
-		} `ini:"cron.deleted_branches_cleanup"`
-		UpdateMigrationPosterID struct {
-			Schedule string
-		} `ini:"cron.update_migration_poster_id"`
-	}{
-		UpdateMirror: struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-		}{
-			Enabled:    true,
-			RunAtStart: false,
-			Schedule:   "@every 10m",
-		},
-		RepoHealthCheck: struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-			Timeout    time.Duration
-			Args       []string `delim:" "`
-		}{
-			Enabled:    true,
-			RunAtStart: false,
-			Schedule:   "@every 24h",
-			Timeout:    60 * time.Second,
-			Args:       []string{},
-		},
-		CheckRepoStats: struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-		}{
-			Enabled:    true,
-			RunAtStart: true,
-			Schedule:   "@every 24h",
-		},
-		ArchiveCleanup: struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-			OlderThan  time.Duration
-		}{
-			Enabled:    true,
-			RunAtStart: true,
-			Schedule:   "@every 24h",
-			OlderThan:  24 * time.Hour,
-		},
-		SyncExternalUsers: struct {
-			Enabled        bool
-			RunAtStart     bool
-			Schedule       string
-			UpdateExisting bool
-		}{
-			Enabled:        true,
-			RunAtStart:     false,
-			Schedule:       "@every 24h",
-			UpdateExisting: true,
-		},
-		DeletedBranchesCleanup: struct {
-			Enabled    bool
-			RunAtStart bool
-			Schedule   string
-			OlderThan  time.Duration
-		}{
-			Enabled:    true,
-			RunAtStart: true,
-			Schedule:   "@every 24h",
-			OlderThan:  24 * time.Hour,
-		},
-		UpdateMigrationPosterID: struct {
-			Schedule string
-		}{
-			Schedule: "@every 24h",
-		},
-	}
-)
-
-func newCron() {
-	if err := Cfg.Section("cron").MapTo(&Cron); err != nil {
-		log.Fatal("Failed to map Cron settings: %v", err)
-	}
+// GetCronSettings maps the cron subsection to the provided config
+func GetCronSettings(name string, config interface{}) (interface{}, error) {
+	err := Cfg.Section("cron." + name).MapTo(config)
+	return config, err
 }