fix(fish): async starship

modules/cli/shell/fish.nix

@@ -43,15 +43,6 @@ in
               hash = "sha256-yef5NX4HdZ3ab/2AzNrvvhi0CbeTvXYKZmyH76gIpyk=";
             };
           }
-          {
-            name = "starship";
-            src = pkgs.fetchFromGitHub {
-              owner = "tyler-stefani";
-              repo = "starship";
-              rev = "fff9bc53ef9997775d31d860246af88cd7721ec8";
-              hash = "sha256-S/Vt/jfYTCrMXXfu6YUIv+d0RoT7GYG1isayhtHc7DA=";
-            };
-          }
         ];
         shellAliases = {
           la = "lsd -lah";
@@ -63,6 +54,7 @@ in
         interactiveShellInit = lib.mkBefore ''
           fish_vi_key_bindings
           fish_config theme choose tokyonight_storm
+          ${lib.optionalString config.my.cli.shell.starship.enable "source ${./starship.fish}"}
         '';
         functions = {
           fish_greeting = "";

modules/cli/shell/starship.fish

@@ -0,0 +1,143 @@
+# This file is modified from:
+# https://github.com/tyler-stefani/starship/blob/main/conf.d/starship.fish
+# The MIT License can be found here:
+# https://github.com/tyler-stefani/starship/blob/main/LICENSE
+
+status is-interactive
+or exit 0
+
+# set temp file and signal for async prompts
+if test -n "$XDG_RUNTIME_DIR"
+    set -g starship_temp_dir "$XDG_RUNTIME_DIR"/fish-async-prompt
+else
+    set -g starship_temp_dir /tmp/fish-async-prompt
+end
+mkdir -p "$starship_temp_dir"
+set -g starship_temp_file "$starship_temp_dir"/"$fish_pid"_last_prompt
+set -g starship_async_signal SIGUSR1
+
+function fish_prompt
+    if test "$TRANSIENT" = "1"
+        starship_transient_prompt_func
+    else if test -e $starship_temp_file
+        cat $starship_temp_file 
+    else
+        starship_transient_prompt_func
+    end
+end
+
+function starship_transient_prompt_func
+    # Clear from cursor to end of screen as `commandline -f repaint` does not do this
+    # See https://github.com/fish-shell/fish-shell/issues/8418
+    printf \e\[0J
+    starship module character
+end
+
+
+function fish_right_prompt
+    switch "$fish_key_bindings"
+        case fish_hybrid_key_bindings fish_vi_key_bindings
+            set STARSHIP_KEYMAP "$fish_bind_mode"
+        case '*'
+            set STARSHIP_KEYMAP insert
+    end
+    set STARSHIP_CMD_PIPESTATUS $pipestatus
+    set STARSHIP_CMD_STATUS $status
+    # Account for changes in variable name between v2.7 and v3.0
+    set STARSHIP_DURATION "$CMD_DURATION$cmd_duration"
+    set STARSHIP_JOBS (count (jobs -p))
+    if test "$TRANSIENT" = "1"
+        if type -q starship_transient_rprompt_func
+            starship_transient_rprompt_func
+        else
+            printf ""
+        end
+    else
+        starship prompt --right --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="$STARSHIP_CMD_PIPESTATUS" --keymap=$STARSHIP_KEYMAP --cmd-duration=$STARSHIP_DURATION --jobs=$STARSHIP_JOBS
+    end
+end
+
+# Disable virtualenv prompt, it breaks starship
+set -g VIRTUAL_ENV_DISABLE_PROMPT 1
+
+# Remove default mode prompt
+builtin functions -e fish_mode_prompt
+
+set -gx STARSHIP_SHELL fish
+
+# Transience related functions
+function reset-transient --on-event fish_postexec
+    set -g TRANSIENT 0
+end
+
+function transient_execute
+    if commandline --is-valid
+        set -g TRANSIENT 1
+        commandline -f repaint
+    else
+        set -g TRANSIENT 0
+    end
+    commandline -f execute
+end
+
+function transient_cancel
+    if string length -q -- (commandline)
+        set -g TRANSIENT 1
+        commandline -f repaint
+    end
+    commandline -f cancel-commandline
+end
+
+# --user is the default, but listed anyway to make it explicit.
+function enable_transience --description 'enable transient prompt keybindings'
+    bind --user \r transient_execute
+    bind --user -M insert \r transient_execute
+    bind --user \cc transient_cancel
+end
+
+# Erase the transient prompt related key bindings.
+# --user is the default, but listed anyway to make it explicit.
+# Erasing a user binding will revert to the preset.
+function disable_transience --description 'remove transient prompt keybindings'
+    bind --user -e \r
+    bind --user -M insert -e \r
+    bind --user -e \cc
+end
+
+# Set up the session key that will be used to store logs
+# We don't use `random [min] [max]` because it is unavailable in older versions of fish shell
+set -gx STARSHIP_SESSION_KEY (string sub -s1 -l16 (random)(random)(random)(random)(random)0000000000000000)
+
+# async related functions
+function write_prompt_to_temp --on-event fish_prompt
+    switch "$fish_key_bindings"
+        case fish_hybrid_key_bindings fish_vi_key_bindings
+            set STARSHIP_KEYMAP "$fish_bind_mode"
+        case '*'
+            set STARSHIP_KEYMAP insert
+    end
+    set STARSHIP_CMD_PIPESTATUS $pipestatus
+    set STARSHIP_CMD_STATUS $status
+    # Account for changes in variable name between v2.7 and v3.0
+    set STARSHIP_DURATION "$CMD_DURATION$cmd_duration"
+    set STARSHIP_JOBS (count (jobs -p))
+
+    # MODIFIED: '"$STARSHIP_CMD_PIPESTATUS"' -> '$STARSHIP_CMD_PIPESTATUS'
+    fish -c 'starship prompt \
+	    --terminal-width='"$COLUMNS"' \
+	    --status='$STARSHIP_CMD_STATUS' \
+	    --pipestatus='$STARSHIP_CMD_PIPESTATUS' \
+	    --keymap='$STARSHIP_KEYMAP' \
+	    --cmd-duration='$STARSHIP_DURATION' \
+	    --jobs='$STARSHIP_JOBS' > '$starship_temp_file' \
+	    && kill -s '"$starship_async_signal"' '"$fish_pid"'' &
+    disown
+end
+
+function repaint_prompt_on_signal --on-signal "$starship_async_signal"
+    commandline -f repaint
+end
+
+function remove_temp_prompt_on_exit --on-event fish_exit
+    rm -f $starship_temp_file
+end