#!/bin/bash
set -e

# Tag the latest build with the short git sha. Push the tag in addition
# to the "latest" tag already pushed.
GIT_SHA_TAG=${SOURCE_COMMIT:0:12}
docker tag $IMAGE_NAME $DOCKER_REPO:$GIT_SHA_TAG
docker push $DOCKER_REPO:$GIT_SHA_TAG

# Create a working directory.
BUILD_TIMESTAMP=$(date -u +%FT%TZ)
WORKDIR=$(mktemp -d)
GIT_URI="git@github.com:jupyter/docker-stacks.wiki.git"
GIT_SANDBOX="${WORKDIR}/docker-stacks.wiki"
IMAGE_SHORT_NAME=$(basename $DOCKER_REPO)
MANIFEST_FILE="${GIT_SANDBOX}/manifests/${IMAGE_SHORT_NAME}-${GIT_SHA_TAG}.md"
INDEX_FILE="${GIT_SANDBOX}/Home.md"

# Configure git so it can push back to GitHub.
eval $(ssh-agent -s)
ssh-add <(base64 -d <(echo "$DEPLOY_KEY"))
ssh-add -l
git config --global user.email "jupyter@googlegroups.com"
git config --global user.name "Jupyter Docker Stacks"

# Glone the GitHub project wiki.
pushd "$WORKDIR"
git clone "$GIT_URI"
popd

# Render the build manifest template.
mkdir -p $(dirname "$MANIFEST_FILE")
source hooks/manifest.tmpl
source hooks/index.tmpl

# Push the wiki update back to GitHub.
pushd "$GIT_SANDBOX"
git add .
git commit -m "DOC: Build ${MANIFEST_FILE}"
git push -u origin master
popd

# Shutdown the ssh agent for good measure.
ssh-agent -k

# Invoke all downstream build triggers.
set +e
for url in $(echo $NEXT_BUILD_TRIGGERS | sed "s/,/ /g")
do
    curl -X POST $url
done