Add IPC config subcommand

This patch adds a new mechanism for changing configuration options
without editing the configuration file, by sending options to running
instances through `alacritty msg`.

Each window will load Alacritty's configuration file by default and then
accept IPC messages for config updates using the `alacritty msg config`
subcommand. By default all windows will be updated, individual windows
can be addressed using `alacritty msg config --window-id
"$ALACRITTY_WINDOW_ID"`.

Each option will replace the config's current value and cannot be reset
until Alacritty is restarted or the option is overwritten with a new
value.

Configuration options are passed in the format `field.subfield=value`,
where `value` is interpreted as yaml.

Closes #472.

1 files changed, 8 insertions, 4 deletions

diff --git a/extra/completions/alacritty.fish b/extra/completions/alacritty.fish
index 69b3d777..fdc24ab2 100644
--- a/extra/completions/alacritty.fish
+++ b/extra/completions/alacritty.fish
@@ -15,13 +15,17 @@ complete -c alacritty -n "__fish_use_subcommand" -s v -d 'Increases the level of
 complete -c alacritty -n "__fish_use_subcommand" -l hold -d 'Remain open after child process exit'
 complete -c alacritty -n "__fish_use_subcommand" -f -a "msg" -d 'Send a message to the Alacritty socket'
 complete -c alacritty -n "__fish_use_subcommand" -f -a "help" -d 'Print this message or the help of the given subcommand(s)'
-complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from help" -s s -l socket -d 'IPC socket connection path override' -r -F
-complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from help" -s h -l help -d 'Print help information'
-complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from help" -f -a "create-window" -d 'Create a new window in the same Alacritty process'
-complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from help" -f -a "help" -d 'Print this message or the help of the given subcommand(s)'
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from config; and not __fish_seen_subcommand_from help" -s s -l socket -d 'IPC socket connection path override' -r -F
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from config; and not __fish_seen_subcommand_from help" -s h -l help -d 'Print help information'
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from config; and not __fish_seen_subcommand_from help" -f -a "create-window" -d 'Create a new window in the same Alacritty process'
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from config; and not __fish_seen_subcommand_from help" -f -a "config" -d 'Update the Alacritty configuration'
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and not __fish_seen_subcommand_from create-window; and not __fish_seen_subcommand_from config; and not __fish_seen_subcommand_from help" -f -a "help" -d 'Print this message or the help of the given subcommand(s)'
 complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from create-window" -l working-directory -d 'Start the shell in the specified working directory' -r -F
 complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from create-window" -s e -l command -d 'Command and args to execute (must be last argument)' -r
 complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from create-window" -s t -l title -d 'Defines the window title [default: Alacritty]' -r
 complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from create-window" -l class -d 'Defines window class/app_id on X11/Wayland [default: Alacritty]' -r
 complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from create-window" -l hold -d 'Remain open after child process exit'
 complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from create-window" -s h -l help -d 'Print help information'
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from config" -s w -l window-id -d 'Window ID for the new config' -r
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from config" -s r -l reset -d 'Clear all runtime configuration changes'
+complete -c alacritty -n "__fish_seen_subcommand_from msg; and __fish_seen_subcommand_from config" -s h -l help -d 'Print help information'