Add operations

functions/git_prompt.fish

@@ -1,7 +1,40 @@
 function git_prompt
     # Branch or SHA
     set -l location (git branch --show-current 2>/dev/null) || return
-    test -z "$location" && set -l location (git rev-parse --short HEAD)
+    git rev-parse --git-dir --short HEAD | read --local --line gitDir sha
+    test -z "$location" && set location $sha
+
+    set -l operation
+    set -l step
+    set -l totalSteps
+
+    if test -d $gitDir/rebase-merge
+        set step (cat $gitDir/rebase-merge/msgnum 2>/dev/null)
+        set totalSteps (cat $gitDir/rebase-merge/end 2>/dev/null)
+        if test -f $gitDir/rebase-merge/interactive
+            set operation rebase-i
+        else
+            set operation rebase-m
+        end
+    else if test -d $gitDir/rebase-apply
+        set step (cat $gitDir/rebase-apply/next 2>/dev/null)
+        set totalSteps (cat $gitDir/rebase-apply/last 2>/dev/null)
+        if test -f $gitDir/rebase-apply/rebasing
+            set operation rebase
+        else if test -f $gitDir/rebase-apply/applying
+            set operation am
+        else
+            set operation am/rebase
+        end
+    else if test -f $gitDir/MERGE_HEAD
+        set operation merge
+    else if test -f $gitDir/CHERRY_PICK_HEAD
+        set operation cherry-picking
+    else if test -f $gitDir/REVERT_HEAD
+        set operation revert
+    else if test -f $gitDir/BISECT_LOG
+        set operation bisect
+    end
 
     # Upstream behind/ahead
     git rev-list --count --left-right @{upstream}...HEAD 2>/dev/null |
@@ -22,6 +55,8 @@ function git_prompt
     # Print the information
     printf '%s' \
         ' '$location \
+        ' '$operation \
+        ' '$step/$totalSteps \
         ' ⇣'$upstreamBehind \
         ' ⇡'$upstreamAhead \
         ' ~'$unmerged \