fish: Refactor git prompt to a separate function

fish/.config/fish/functions/fish_custom_git_prompt.fish

@@ -0,0 +1,43 @@
+function fish_custom_git_prompt --description "Custom git prompt"
+    # Show some pretty git information if we're in a git repo
+    set -l is_git_worktree (git rev-parse --is-inside-work-tree 2>/dev/null)
+    if test "$is_git_worktree" = true
+        if git rev-parse '@{u}' >/dev/null 2>&1
+            # If an upstream is set, check how far ahead/behind the branch is
+            set -l git_commits_ahead (git rev-list '@{u}..HEAD' | wc -l | awk '{print $1}')
+            set -l git_commits_behind (git rev-list 'HEAD..@{u}' | wc -l | awk '{print $1}')
+            if [ \( "$git_commits_ahead" -eq 0 \) -a \( "$git_commits_behind" -eq 0 \) ]
+                set_color blue
+                echo -n '⦿'
+            else
+                if [ "$git_commits_behind" -gt 0 ]
+                    set_color red
+                    echo -n "↓$git_commits_behind"
+                end
+                if [ "$git_commits_ahead" -gt 0 ]
+                    set_color brred
+                    echo -n "↑$git_commits_ahead"
+                end
+            end
+        else
+            # Otherwise, indicate that an upstream is unknown
+            set_color brred
+            echo -n "$question_mark_in_circle"
+        end
+
+        set -l git_branch (git branch 2>/dev/null | sed -n '/\* /s///p')
+        if test -n "$git_branch"
+            set_color blue
+            echo -n ' ['
+            # Color the branch name differently if the working tree is dirty
+            if [ (count (git status --porcelain)) -gt 0 ]
+                set_color brred
+            else
+                set_color yellow
+            end
+            echo -n "$git_branch"
+            set_color blue
+            echo -n '] '
+        end
+    end
+end

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

@@ -31,47 +31,7 @@ function fish_prompt
     end
     echo -n ' '
 
-    # Show some pretty git information if we're in a git repo
+    fish_custom_git_prompt
-    set -l is_git_worktree (git rev-parse --is-inside-work-tree 2>/dev/null)
-    if test "$is_git_worktree" = true
-        if git rev-parse '@{u}' >/dev/null 2>&1
-            # If an upstream is set, check how far ahead/behind the branch is
-            set -l git_commits_ahead (git rev-list '@{u}..HEAD' | wc -l | awk '{print $1}')
-            set -l git_commits_behind (git rev-list 'HEAD..@{u}' | wc -l | awk '{print $1}')
-            if [ \( "$git_commits_ahead" -eq 0 \) -a \( "$git_commits_behind" -eq 0 \) ]
-                set_color blue
-                echo -n '⦿'
-            else
-                if [ "$git_commits_behind" -gt 0 ]
-                    set_color red
-                    echo -n "↓$git_commits_behind"
-                end
-                if [ "$git_commits_ahead" -gt 0 ]
-                    set_color brred
-                    echo -n "↑$git_commits_ahead"
-                end
-            end
-        else
-            # Otherwise, indicate that an upstream is unknown
-            set_color brred
-            echo -n "$question_mark_in_circle"
-        end
-
-        set -l git_branch (git branch 2>/dev/null | sed -n '/\* /s///p')
-        if test -n "$git_branch"
-            set_color blue
-            echo -n ' ['
-            # Color the branch name differently if the working tree is dirty
-            if [ (count (git status --porcelain)) -gt 0 ]
-                set_color brred
-            else
-                set_color yellow
-            end
-            echo -n "$git_branch"
-            set_color blue
-            echo -n '] '
-        end
-    end
 
     if [ "$command_status" -eq 0 ]
         set_color brcyan