feat: add refetch_frequency parameter to settings (#857)

docs/configuration.md

@@ -33,6 +33,7 @@ Config options:
   - [`git_url`](#git_url)
   - [`ref`](#ref-1)
   - [`refetch`](#refetch)
+  - [`refetch_frequency`](#refetch_frequency)
   - [`configs`](#configs)
 - [`<pre-commit>`](#hook-name) hook name
   - [`files` (global)](#files-global)
@@ -417,6 +418,29 @@ remotes:
     refetch: true
 ```
 
+### `refetch_frequency`
+
+**Default:** Not set
+
+Specifies how frequently Lefthook should refetch the remote configuration. This can be set to `always`, `never` or a time duration like `24h`, `30m`, etc.
+
+- When set to `always`, Lefthook will always refetch the remote configuration on each run.
+- When set to a duration (e.g., `24h`), Lefthook will check the last fetch time and refetch the configuration only if the specified amount of time has passed.
+- When set to `never` or not set, Lefthook will not fetch from remote.
+
+**Example**
+
+```yml
+# lefthook.yml
+
+remotes:
+  - git_url: https://github.com/evilmartians/lefthook
+    refetch_frequency: 24h # Refetches once every 24 hours
+```
+
+> [!WARNING]
+> If `refetch` is set to `true`, it overrides any setting in `refetch_frequency`.
+
 ### `configs`
 
 **Default:** `[lefthook.yml]`

internal/config/remote.go

@@ -4,9 +4,10 @@ type Remote struct {
 	GitURL string `json:"git_url,omitempty" mapstructure:"git_url"       toml:"git_url"       yaml:"git_url"`
 	Ref    string `json:"ref,omitempty"     mapstructure:"ref,omitempty" toml:"ref,omitempty" yaml:",omitempty"`
 	// Deprecated
-	Config  string   `json:"config,omitempty"  mapstructure:"config,omitempty"  toml:"config,omitempty"  yaml:",omitempty"`
-	Configs []string `json:"configs,omitempty" mapstructure:"configs,omitempty" toml:"configs,omitempty" yaml:",omitempty"`
-	Refetch bool     `json:"refetch,omitempty" mapstructure:"refetch,omitempty" toml:"refetch,omitempty" yaml:",omitempty"`
+	Config           string   `json:"config,omitempty"            mapstructure:"config,omitempty"            toml:"config,omitempty"            yaml:",omitempty"`
+	Configs          []string `json:"configs,omitempty"           mapstructure:"configs,omitempty"           toml:"configs,omitempty"           yaml:",omitempty"`
+	Refetch          bool     `json:"refetch,omitempty"           mapstructure:"refetch,omitempty"           toml:"refetch,omitempty"           yaml:",omitempty"`
+	RefetchFrequency string   `json:"refetch_frequency,omitempty" mapstructure:"refetch_frequency,omitempty" toml:"refetch_frequency,omitempty" yaml:",omitempty"`
 }
 
 func (r *Remote) Configured() bool {

internal/lefthook/install.go

@@ -9,6 +9,7 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/gobwas/glob"
 	"github.com/spf13/afero"
@@ -118,7 +119,7 @@ func (l *Lefthook) syncHooks(cfg *config.Config, fetchRemotes bool) (*config.Con
 
 	if fetchRemotes {
 		for _, remote := range cfg.Remotes {
-			if remote.Configured() && remote.Refetch {
+			if remote.Configured() && l.shouldRefetch(remote) {
 				if err = l.repo.SyncRemote(remote.GitURL, remote.Ref, false); err != nil {
 					log.Warnf("Couldn't sync from %s. Will continue anyway: %s", remote.GitURL, err)
 					continue
@@ -141,6 +142,38 @@ func (l *Lefthook) syncHooks(cfg *config.Config, fetchRemotes bool) (*config.Con
 	return cfg, l.createHooksIfNeeded(cfg, true, false)
 }
 
+func (l *Lefthook) shouldRefetch(remote *config.Remote) bool {
+	if remote.Refetch || remote.RefetchFrequency == "always" {
+		return true
+	}
+	if remote.RefetchFrequency == "" || remote.RefetchFrequency == "never" {
+		return false
+	}
+
+	timedelta, err := time.ParseDuration(remote.RefetchFrequency)
+	if err != nil {
+		log.Warnf("Couldn't parse refetch frequency %s. Will continue anyway: %s", remote.RefetchFrequency, err)
+		return false
+	}
+
+	var lastFetchTime time.Time
+	remotePath := l.repo.RemoteFolder(remote.GitURL, remote.Ref)
+	info, err := l.Fs.Stat(filepath.Join(remotePath, ".git", "FETCH_HEAD"))
+
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return true
+		}
+
+		log.Warnf("Failed to detect last fetch time: %s", err)
+		return false
+	}
+
+	lastFetchTime = info.ModTime()
+	return time.Now().After(lastFetchTime.Add(timedelta))
+
+}
+
 func (l *Lefthook) createHooksIfNeeded(cfg *config.Config, checkHashSum, force bool) error {
 	if checkHashSum && l.hooksSynchronized(cfg) {
 		return nil

internal/lefthook/install_test.go

@@ -410,3 +410,130 @@ post-commit:
 		})
 	}
 }
+
+func TestShouldRefetch(t *testing.T) {
+	root, err := filepath.Abs("src")
+	if err != nil {
+		t.Errorf("unexpected error: %s", err)
+	}
+
+	configPath := filepath.Join(root, "lefthook.yml")
+	fetchHeadPath := func(lefthook *Lefthook, remote *config.Remote) string {
+		remotePath := lefthook.repo.RemoteFolder(remote.GitURL, remote.Ref)
+		return filepath.Join(remotePath, ".git", "FETCH_HEAD")
+	}
+
+	repo := &git.Repository{
+		HooksPath: filepath.Join(root, ".git", "hooks"),
+		RootPath:  root,
+		InfoPath:  filepath.Join(root, ".git", "info"),
+	}
+	for n, tt := range [...]struct {
+		name, config                                                    string
+		shouldRefetchInitially, shouldRefetchAfter, shouldRefetchBefore bool
+	}{
+		{
+			name: "with refetch frequency configured to always",
+			config: `
+remotes:
+  - git_url: https://github.com/evilmartians/lefthook
+    refetch_frequency: always
+    configs:
+      - examples/remote/ping.yml
+`,
+			shouldRefetchInitially: true,
+			shouldRefetchAfter:     true,
+			shouldRefetchBefore:    true,
+		},
+		{
+			name: "with refetch frequency configured to 1 minute",
+			config: `
+remotes:
+  - git_url: https://github.com/evilmartians/lefthook
+    refetch_frequency: 1m
+    configs:
+      - examples/remote/ping.yml
+`,
+			shouldRefetchInitially: true,
+			shouldRefetchAfter:     true,
+			shouldRefetchBefore:    false,
+		},
+		{
+			name: "with refetch frequency configured to never",
+			config: `
+remotes:
+  - git_url: https://github.com/evilmartians/lefthook
+    refetch_frequency: never
+    configs:
+      - examples/remote/ping.yml
+`,
+			shouldRefetchInitially: false,
+			shouldRefetchAfter:     false,
+			shouldRefetchBefore:    false,
+		},
+		{
+			name: "with refetch frequency not configured",
+			config: `
+remotes:
+  - git_url: https://github.com/evilmartians/lefthook
+    configs:
+      - examples/remote/ping.yml
+`,
+			shouldRefetchInitially: false,
+			shouldRefetchAfter:     false,
+			shouldRefetchBefore:    false,
+		},
+	} {
+		fs := afero.NewMemMapFs()
+		lefthook := &Lefthook{
+			Options: &Options{Fs: fs},
+			repo:    repo,
+		}
+
+		t.Run(fmt.Sprintf("%d: %s", n, tt.name), func(t *testing.T) {
+			// Create configuration file
+			if len(tt.config) > 0 {
+				if err := afero.WriteFile(fs, configPath, []byte(tt.config), 0o644); err != nil {
+					t.Errorf("unexpected error: %s", err)
+				}
+				timestamp := time.Date(2022, time.June, 22, 10, 40, 10, 1, time.UTC)
+				if err := fs.Chtimes(configPath, timestamp, timestamp); err != nil {
+					t.Errorf("unexpected error: %s", err)
+				}
+			}
+
+			cfg, err := config.Load(lefthook.Fs, repo)
+			if err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+
+			remote := cfg.Remotes[0]
+
+			if lefthook.shouldRefetch(remote) != tt.shouldRefetchInitially {
+				t.Errorf("unexpected shouldRefetch return before first fetch")
+			}
+
+			if err := afero.WriteFile(fs, fetchHeadPath(lefthook, remote), []byte(""), 0o644); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+
+			firstFetchTime := time.Now().Add(-2 * time.Duration(time.Minute))
+
+			if err := fs.Chtimes(fetchHeadPath(lefthook, remote), firstFetchTime, firstFetchTime); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+
+			if lefthook.shouldRefetch(remote) != tt.shouldRefetchAfter {
+				t.Errorf("unexpected shouldRefetch return after refetch period")
+			}
+
+			if err := fs.Chtimes(fetchHeadPath(lefthook, remote), firstFetchTime, time.Now()); err != nil {
+				t.Errorf("unexpected error: %s", err)
+			}
+
+			if lefthook.shouldRefetch(remote) != tt.shouldRefetchBefore {
+				t.Errorf("unexpected shouldRefetch return before refetch period")
+			}
+		})
+	}
+}