#!/usr/bin/env bash

# Lint all commit messages that are newer than upstream/master if running
# locally or the commits in the push or PR if in CircleCI.

# The rules can be found in /.gitlint

repository="zulip/zulip"

if [[ "
$(git remote -v)
" =~ '
'([^[:space:]]*)[[:space:]]*(https://github\.com/|ssh://git@github\.com/|git@github\.com:)"$repository"(\.git|/)?\ \(fetch\)'
' ]]; then
    range="${BASH_REMATCH[1]}/master..HEAD"
else
    range="upstream/master..HEAD"
fi

commits=$(git log "$range" | wc -l)
if [ "$commits" -gt 0 ]; then
    # Only run gitlint with non-empty commit lists, to avoid a printed
    # warning.
    gitlint --commits "$range"
fi