Add a clear cache action

kittens/choose_files/main.go

@@ -748,6 +748,15 @@ var default_cwd string
 var use_light_colors bool
 
 func main(_ *cli.Command, opts *Options, args []string) (rc int, err error) {
+	if opts.ClearCache {
+		c, err := preview_cache()
+		if err != nil {
+			return 1, err
+		}
+		if err = c.Clear(); err != nil {
+			return 1, err
+		}
+	}
 	write_output := func(selections []string, interrupted bool, current_filter string) {
 		payload := make(map[string]any)
 		if err != nil {

kittens/choose_files/main.py

@@ -217,6 +217,11 @@ def handle_result(args: list[str], data: dict[str, Any], target_window_id: int,
 
 --write-pid-to
 Path to a file to which to write the process ID (PID) of this process to.
+
+
+--clear-cache
+type=bool-set
+Clear the caches used by this kitten.
 '''.format(config_help=CONFIG_HELP.format(conf_name='choose-files', appname=appname)).format
 
 

tools/disk_cache/api.go

@@ -66,6 +66,12 @@ func (dc *DiskCache) Remove(key string) (err error) {
 	return dc.remove(key)
 }
 
+func (dc *DiskCache) Clear() (err error) {
+	dc.lock()
+	defer dc.unlock()
+	return dc.clear()
+}
+
 func (dc *DiskCache) AddPath(path, key string, items map[string][]byte) (ans map[string]string, err error) {
 	dc.lock()
 	defer dc.unlock()

tools/disk_cache/implementation.go

@@ -10,6 +10,7 @@ import (
 	"os"
 	"path/filepath"
 	"slices"
+	"strings"
 	"syscall"
 	"time"
 
@@ -60,6 +61,8 @@ func get_file_state_from_path(path string) (*file_state, error) {
 	}
 }
 
+const GET_DIR_PREFIX = "getdir-"
+
 func new_disk_cache(path string, max_size int64) (dc *DiskCache, err error) {
 	if path, err = filepath.Abs(path); err != nil {
 		return
@@ -81,7 +84,7 @@ func new_disk_cache(path string, max_size int64) (dc *DiskCache, err error) {
 	if _, err := ans.prune(); err != nil {
 		return nil, err
 	}
-	if ans.get_dir, err = os.MkdirTemp(ans.Path, "getdir-*"); err != nil {
+	if ans.get_dir, err = os.MkdirTemp(ans.Path, GET_DIR_PREFIX+"*"); err != nil {
 		return
 	}
 	if err = utils.AtExitRmtree(ans.get_dir); err != nil {
@@ -129,7 +132,9 @@ func (dc *DiskCache) unlock() {
 	}
 }
 
-func (dc *DiskCache) entries_path() string { return filepath.Join(dc.Path, "entries.json") }
+const ENTRIES_NAME = "entries.json"
+
+func (dc *DiskCache) entries_path() string { return filepath.Join(dc.Path, ENTRIES_NAME) }
 
 func (dc *DiskCache) write_entries_if_dirty() (err error) {
 	if !dc.entries_dirty {
@@ -321,6 +326,28 @@ func (dc *DiskCache) get(key string, items []string) (map[string]string, error)
 	return ans, dc.write_entries_if_dirty()
 }
 
+func (dc *DiskCache) clear() (err error) {
+	if entries, err := os.ReadDir(dc.Path); err != nil {
+		return err
+	} else {
+		defer func() {
+			if we := dc.write_entries_if_dirty(); we != nil && err == nil {
+				err = we
+			}
+		}()
+		for _, x := range entries {
+			if x.IsDir() && !strings.HasPrefix(x.Name(), GET_DIR_PREFIX) {
+				_ = os.RemoveAll(filepath.Join(dc.Path, x.Name()))
+			}
+		}
+		dc.entries_dirty = true
+		dc.entry_map = make(map[string]*Entry)
+		dc.entries.SortedEntries = make([]*Entry, 0)
+		dc.entries.TotalSize = 0
+	}
+	return
+}
+
 func (dc *DiskCache) remove(key string) (err error) {
 	if err = dc.ensure_entries(); err != nil {
 		return