Sometimes it might be useful to know the version of the running
instance. This is currently possible with templates (`:echo {{version}}`
does the trick), but it seems clearer to have a dedicated command.
Implement such command.

Signed-off-by: inwit <inwit@sindominio.net>
---
 commands/version.go | 32 ++++++++++++++++++++++++++++++++
 doc/aerc.1.scd      |  3 +++
 2 files changed, 35 insertions(+)
 create mode 100644 commands/version.go

diff --git a/commands/version.go b/commands/version.go
new file mode 100644
index 00000000..fb177120
--- /dev/null
+++ b/commands/version.go
@@ -0,0 +1,32 @@
+package commands
+
+import (
+	"fmt"
+	"time"
+
+	"git.sr.ht/~rjarry/aerc/app"
+	"git.sr.ht/~rjarry/aerc/lib/log"
+)
+
+type Version struct{}
+
+func init() {
+	Register(Version{})
+}
+
+func (Version) Description() string {
+	return "Display the version of the running aerc instance."
+}
+
+func (Version) Context() CommandContext {
+	return GLOBAL
+}
+
+func (Version) Aliases() []string {
+	return []string{"version"}
+}
+
+func (p Version) Execute(args []string) error {
+	app.PushStatus(fmt.Sprint("aerc "+log.BuildInfo), 20*time.Second)
+	return nil
+}
diff --git a/doc/aerc.1.scd b/doc/aerc.1.scd
index 595a94af..b01dee75 100644
--- a/doc/aerc.1.scd
+++ b/doc/aerc.1.scd
@@ -171,6 +171,9 @@ These commands work in any context.
 *:pwd*
 	Displays aerc's current working directory in the status bar.
 
+*:version*
+	Displays the version of the running aerc instance.
+
 *:send-keys* _<keystrokes>_
 	Send keystrokes to the currently visible terminal, if any. Can be used to
 	control embedded editors to save drafts or quit in a safe manner.
-- 
2.47.2