Fixes for OMP prompts and for default PATH

zsh.d/zshfunctions/gitfetch

@@ -7,7 +7,60 @@ cd $1
 gitdir=$(git rev-parse --git-dir 2> /dev/null) || return 0
 last_fetch=$(zstat +mtime $gitdir/FETCH_HEAD 2> /dev/null || echo 0)
 let "diff = $(strftime %s) - $last_fetch"
-[ $diff -gt ${GIT_FETCH_INTERVAL:-30} ] && git fetch --all -p
+if [ $diff -gt ${GIT_FETCH_INTERVAL:-30} ]; then
+   setopt localoptions noshwordsplit
+
+  # Sets `GIT_TERMINAL_PROMPT=0` to disable authentication prompt for Git fetch (Git 2.3+).
+  export GIT_TERMINAL_PROMPT=0
+  # Set SSH `BachMode` to disable all interactive SSH password prompting.
+  export GIT_SSH_COMMAND="${GIT_SSH_COMMAND:-"ssh"} -o BatchMode=yes"
+
+  local ref
+  ref=$(command git symbolic-ref -q HEAD)
+  local -a remote
+  remote=($(command git for-each-ref --format='%(upstream:remotename) %(refname)' $ref))
+
+  if [[ -z $remote[1] ]]; then
+    # No remote specified for this branch, skip fetch.
+    return 97
+  fi
+
+  # Default return code, which indicates Git fetch failure.
+  local fail_code=99
+
+  # Guard against all forms of password prompts. By setting the shell into
+  # MONITOR mode we can notice when a child process prompts for user input
+  # because it will be suspended. Since we are inside an async worker, we
+  # have no way of transmitting the password and the only option is to
+  # kill it. If we don't do it this way, the process will corrupt with the
+  # async worker.
+  setopt localtraps monitor
+
+  # Make sure local HUP trap is unset to allow for signal propagation when
+  # the async worker is flushed.
+  trap - HUP
+
+  trap '
+    # Unset trap to prevent infinite loop
+    trap - CHLD
+    if [[ $jobstates = suspended* ]]; then
+      # Set fail code to password prompt and kill the fetch.
+      fail_code=98
+      kill %%
+    fi
+  ' CHLD
+
+  # Only fetch information for the current branch and avoid
+  # fetching tags or submodules to speed up the process.
+  command git -c gc.auto=0 fetch \
+    --quiet \
+    --no-tags \
+    --recurse-submodules=no \
+    $remote &>/dev/null &
+  wait $! || return $fail_code
+
+  unsetopt monitor
+fi
 
 return 0