commands: add reload

Add the reload command that performs a reload of config files. The
reload command supports reloading the binds.conf and aerc.conf config
files.

Reloading will reload account views (including the directory list),
message viewers, and composers.

Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Inwit <inwit@sindominio.net>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 180 insertions, 0 deletions

diff --git a/commands/reload.go b/commands/reload.go
new file mode 100644
index 00000000..cd32bb36
--- /dev/null
+++ b/commands/reload.go
@@ -0,0 +1,180 @@
+package commands
+
+import (
+	"os"
+
+	"git.sr.ht/~rjarry/aerc/app"
+	"git.sr.ht/~rjarry/aerc/config"
+	"git.sr.ht/~rjarry/aerc/lib/log"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
+)
+
+type Reload struct {
+	Binds bool   `opt:"-B"`
+	Conf  bool   `opt:"-C"`
+	Style string `opt:"-s" complete:"CompleteStyle"`
+}
+
+func init() {
+	Register(Reload{})
+}
+
+func (r *Reload) CompleteStyle(s string) []string {
+	var files []string
+	for _, dir := range config.Ui.StyleSetDirs {
+		entries, err := os.ReadDir(dir)
+		if err != nil {
+			log.Debugf("could not read directory '%s': %v", dir,
+				err)
+			continue
+		}
+		for _, e := range entries {
+			if e.IsDir() {
+				continue
+			}
+			files = append(files, e.Name())
+		}
+	}
+	return FilterList(files, s, nil)
+}
+
+func (Reload) Context() CommandContext {
+	return GLOBAL
+}
+
+func (Reload) Aliases() []string {
+	return []string{"reload"}
+}
+
+func (r Reload) Execute(args []string) error {
+	reconfigure := false
+
+	if r.Binds {
+		f, err := config.ReloadBinds()
+		if err != nil {
+			return err
+		}
+		app.PushSuccess("Binds reloaded: " + f)
+	}
+
+	if r.Conf {
+		f, err := config.ReloadConf()
+		if err != nil {
+			return err
+		}
+		app.PushSuccess("Conf reloaded: " + f)
+		reconfigure = true
+	}
+
+	if r.Style != "" {
+		config.Ui.ClearCache()
+		config.Ui.StyleSetName = r.Style
+		err := config.Ui.LoadStyle()
+		if err != nil {
+			return err
+		}
+		app.PushSuccess("Styleset: " + r.Style)
+		reconfigure = true
+	}
+
+	if !reconfigure {
+		return nil
+	}
+
+	// reload account views and message stores
+	for _, name := range app.AccountNames() {
+
+		// rebuild account view
+		view, err := app.Account(name)
+		if err != nil {
+			continue
+		}
+
+		dirlist := view.Directories()
+		if dirlist == nil {
+			continue
+		}
+
+		wantTree := config.Ui.ForAccount(name).DirListTree
+		dirlist = adjustDirlist(dirlist, wantTree)
+		view.SetDirectories(dirlist)
+
+		// now rebuild grid with correct dirlist
+		view.Configure()
+
+		// reconfigure the message stores
+		for _, dir := range dirlist.List() {
+			store, ok := dirlist.MsgStore(dir)
+			if !ok {
+				continue
+			}
+			uiConf := dirlist.UiConfig(dir)
+			store.Configure(view.SortCriteria(uiConf))
+		}
+		ui.Invalidate()
+	}
+
+	// reload message viewers
+	doTabs(func(tab *ui.Tab) {
+		mv, ok := tab.Content.(*app.MessageViewer)
+		if !ok {
+			return
+		}
+		reloaded := app.NewMessageViewer(
+			mv.SelectedAccount(),
+			mv.MessageView(),
+		)
+		app.ReplaceTab(mv, reloaded, tab.Name, false)
+	})
+
+	// reload composers
+	doTabs(func(tab *ui.Tab) {
+		c, ok := tab.Content.(*app.Composer)
+		if !ok {
+			return
+		}
+		_ = c.SwitchAccount(c.Account())
+	})
+
+	return nil
+}
+
+func adjustDirlist(d app.DirectoryLister, wantTree bool) app.DirectoryLister {
+	switch d := d.(type) {
+	case *app.DirectoryList:
+		if wantTree {
+			log.Tracef("dirlist: build tree")
+			tree := app.NewDirectoryTree(d)
+			tree.SelectedMsgStore()
+			return tree
+		}
+		log.Tracef("dirlist: already dirlist")
+		return d
+	case *app.DirectoryTree:
+		if !wantTree {
+			log.Tracef("dirtree: get dirlist")
+			return d.DirectoryList
+		}
+		log.Tracef("dirtree: already tree")
+		return d
+	default:
+		return d
+	}
+}
+
+func doTabs(do func(*ui.Tab)) {
+	var tabname string
+	if t := app.SelectedTab(); t != nil {
+		tabname = t.Name
+	}
+	for i := range app.TabNames() {
+		tab := app.GetTab(i)
+		if tab == nil {
+			continue
+		}
+		do(tab)
+	}
+	if tabname != "" {
+		app.SelectTab(tabname)
+	}
+}