#!/bin/bash

set -e

# We need jq to analyse the PR files JSON, so install that first
sudo apt-get -q update && sudo apt-get -q install bc jq

echo "TEST_AND_PUBLISH=1" > "$STATE"

if [ -n "$CI_PULL_REQUEST" -a "$CI_PULL_REQUEST" = "$CI_PULL_REQUESTS" ] ; then
    if PR=$(echo "$CI_PULL_REQUEST" | grep -oP '(?<=^https://github.com/weaveworks/weave/pull/)[0-9]+$') ; then
        echo "GH_PR=$PR" >> "$STATE"
        if FILES=$(curl -s https://api.github.com/repos/weaveworks/weave/pulls/$PR/files | jq -r '.[]|.filename') ; then
            echo "PR touches [$FILES]"
            if ! echo "$FILES" | grep -v ^site/ ; then
                echo "PR contains site changes only - skipping tests"
                echo "TEST_AND_PUBLISH=" >> "$STATE"
            else
                echo "PR contains non-site changes - running tests"
            fi
        else
            echo "Unable to get files for PR $PR" >&2
        fi
    else
        echo "Unable to extract PR number from $CI_PULL_REQUEST" >&2
    fi
fi

source "$STATE"

mkdir -p $(dirname $SRCDIR) && cp -r $(pwd)/ $SRCDIR

if [ -n "$TEST_AND_PUBLISH" ] ; then
    bin/setup-circleci-secrets "$SECRET_PASSWORD"
    cd $SRCDIR; git submodule update --init
    if [ "$CIRCLE_NODE_INDEX" = "0" ] ; then
        cd $SRCDIR/test; ./gce.sh make_template
    fi
    cd $SRCDIR/build
    ../tools/rebuild-image weaveworks/weavebuild . Dockerfile build.sh
    touch $SRCDIR/.build.uptodate
    sudo chown -R ubuntu /usr/local/go
fi