git completions installed

.config/fish/functions/git_main_branch.fish

@@ -0,0 +1,11 @@
+function git_main_branch -d 'Detect name of main branch of current git repository'
+  # heuristic to return the name of the main branch
+  command git rev-parse --git-dir &> /dev/null || return
+  for ref in refs/{heads,remotes/{origin,upstream}}/{main,master,trunk}
+    if command git show-ref -q --verify $ref
+      echo (string split -r -m1 -f2 / $ref)
+      return
+    end
+  end
+  echo main
+end