add bash-it

dot_bash_it/completion/available/git.completion.bash

@@ -0,0 +1,42 @@
+# shellcheck shell=bash
+#
+# Locate and load completions for `git`.
+
+# Make sure git is installed
+_command_exists git || return
+
+# Don't handle completion if it's already managed
+if complete -p git &> /dev/null; then
+	_log_warning "completion already loaded - this usually means it is safe to stop using this completion"
+	return 0
+fi
+
+_git_bash_completion_xcrun_git=
+if _command_exists xcrun; then
+	_git_bash_completion_xcrun_git="$(xcrun --find git)"
+fi
+_git_bash_completion_paths=(
+	# Standard locations
+	"${GIT_EXE%/*}/../share/git-core/git-completion.bash"
+	"${GIT_EXE%/*}/../share/git-core/contrib/completion/git-completion.bash"
+	"${GIT_EXE%/*}/../etc/bash_completion.d/git-completion.bash"
+	# MacOS non-system locations
+	"${_git_bash_completion_xcrun_git%/bin/git}/share/git-core/git-completion.bash"
+)
+
+# Load the first completion file found
+_git_bash_completion_found=false
+for _comp_path in "${_git_bash_completion_paths[@]}"; do
+	if [[ -r "$_comp_path" ]]; then
+		_git_bash_completion_found=true
+		# shellcheck disable=SC1090 # don't follow
+		source "$_comp_path"
+		break
+	fi
+done
+
+# Cleanup
+if [[ "${_git_bash_completion_found}" == false ]]; then
+	_log_warning "no completion files found - please try enabling the 'system' completion instead."
+fi
+unset "${!_git_bash_completion@}"