feat(fish): add support for jj in the prompt

fish/.config/fish/functions/fish_jj_prompt.fish

@@ -0,0 +1,41 @@
+function fish_jj_prompt --description 'Write out the jj prompt'
+    # Is jj installed?
+    if not command -sq jj
+        return 1
+    end
+
+    # Are we in a jj repo?
+    if not jj root --quiet &>/dev/null
+        return 1
+    end
+
+    # Generate prompt
+    jj log --ignore-working-copy --no-graph --color always -r @ -T '
+        surround(
+            " (",
+            ")",
+            separate(
+                " ",
+                bookmarks.join(", "),
+                coalesce(
+                    surround(
+                        "\"",
+                        "\"",
+                        if(
+                            description.first_line().substr(0, 24).starts_with(description.first_line()),
+                            description.first_line().substr(0, 24),
+                            description.first_line().substr(0, 23) ++ "…"
+                        )
+                    ),
+                    "(no description set)"
+                ),
+                change_id.shortest(),
+                commit_id.shortest(),
+                if(conflict, "(conflict)"),
+                if(empty, "(empty)"),
+                if(divergent, "(divergent)"),
+                if(hidden, "(hidden)"),
+            )
+        )
+    '
+end

fish/.config/fish/functions/fish_prompt.fish

@@ -33,11 +33,11 @@ end
 
 function fish_prompt --description 'Write out the prompt'
   set -l last_status $status
-  set -l _pwd (set_color $fish_color_cwd) (prompt_pwd)
+  set -l _pwd (set_color $fish_color_cwd) (prompt_pwd) (set_color normal)
 
   echo -n -s (__bcarlin_prompt_venv)
   echo -n -s "$USER" @ (prompt_hostname) ' ' $_pwd
-  echo -n -s (fish_git_prompt)
+  echo -n -s (fish_vcs_prompt)
   if test $last_status -ne 0
       echo -n -s (set_color red --bold)" [$last_status]" (set_color normal)
   end

fish/.config/fish/functions/fish_vcs_prompt.fish

@@ -0,0 +1,12 @@
+function fish_vcs_prompt --description "Print all vcs prompts"
+    # If a prompt succeeded, we assume that it's printed the correct info.
+    # This is so we don't try svn if git already worked.
+    fish_jj_prompt $argv
+    or fish_git_prompt $argv
+    or fish_hg_prompt $argv
+    or fish_fossil_prompt $argv
+    # The svn prompt is disabled by default because it's quite slow on common svn repositories.
+    # To enable it uncomment it.
+    # You can also only use it in specific directories by checking $PWD.
+    # or fish_svn_prompt
+end