fish: add semantic prompt (OSC 133) support

.config/fish/conf.d/prompt.fish

@@ -0,0 +1,91 @@
+function 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$cmd_duration"
+    set STARSHIP_JOBS (count (jobs -p))
+    if test "$TRANSIENT" = 1
+        # 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
+        if type -q starship_transient_prompt_func
+            starship_transient_prompt_func
+        else
+            printf "\n\e[1;32m%%\e[0m "
+        end
+    else
+        /usr/bin/starship prompt --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="$STARSHIP_CMD_PIPESTATUS" --keymap=$STARSHIP_KEYMAP --cmd-duration=$STARSHIP_DURATION --jobs=$STARSHIP_JOBS
+    end
+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
+        /usr/bin/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
+
+# --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
+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
+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)
+
+enable_transience

.config/fish/conf.d/semantic-prompt.fish

@@ -0,0 +1,57 @@
+#!/usr/bin/fish
+# SPDX-License-Identifier: CC0-1.0
+if status --is-interactive
+    set _fishprompt_aid "fish"$fish_pid
+    set _fishprompt_started 0
+    # empty if running; or a numeric exit code; or CANCEL
+    set _fishprompt_postexec ""
+
+    functions -c fish_prompt _fishprompt_saved_prompt
+    set _fishprompt_prompt_count 0
+    set _fishprompt_disp_count 0
+    function _fishprompt_start --on-event fish_prompt
+        set _fishprompt_prompt_count (math $_fishprompt_prompt_count + 1)
+        # don't use post-exec, because it is called *before* omitted-newline output
+        if [ -n "$_fishprompt_postexec" ]
+            printf "\033]133;D;%s;aid=%s\007" "$_fishprompt_postexec" $_fishprompt_aid
+        end
+        printf "\033]133;A;aid=%s;cl=m\007" $_fishprompt_aid
+    end
+
+    function fish_prompt
+        set _fishprompt_disp_count (math $_fishprompt_disp_count + 1)
+        printf "\033]133;P;k=i\007%b\033]133;B\007" (string join "\n" (_fishprompt_saved_prompt))
+        set _fishprompt_started 1
+        set _fishprompt_postexec ""
+    end
+
+    function _fishprompt_preexec --on-event fish_preexec
+        if [ "$_fishprompt_started" = 1 ]
+            printf "\033]133;C;\007"
+        end
+        set _fishprompt_started 0
+    end
+
+    function _fishprompt_postexec --on-event fish_postexec
+        set _fishprompt_postexec $status
+        _fishprompt_start
+    end
+
+    function __fishprompt_cancel --on-event fish_cancel
+        set _fishprompt_postexec CANCEL
+        _fishprompt_start
+    end
+
+    function _fishprompt_exit --on-process %self
+        if [ "$_fishprompt_started" = 1 ]
+            printf "\033]133;Z;aid=%s\007" $_fishprompt_aid
+        end
+    end
+
+    if functions -q fish_right_prompt
+        functions -c fish_right_prompt _fishprompt_saved_right_prompt
+        function fish_right_prompt
+            printf "\033]133;P;k=r\007%b\033]133;B\007" (string join "\n" (_fishprompt_saved_right_prompt))
+        end
+    end
+end

.config/fish/config.fish

@@ -34,15 +34,6 @@ if status is-interactive
     ## History
 
     atuin init fish | source
-
-
-    ## Prompt
-
-    function starship_transient_prompt_func
-        starship module character
-    end
-    starship init fish | source
-    enable_transience
 end
 
 ## Direnv