CBL-Mariner/SPECS/prometheus/generate_source_tarball.sh

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#!/bin/bash
# The flow of this script is as such:
# 1. Download prometheus tarball to a temp working directory and extract it.
# 2. Parse prometheus's Makefile.common and grep the promu version from it.
# 3. Make a temp subfolder for the promu vendor cache.
# 4. Download promu & extract it, then build it with `make build`. Then save the go vendor cache.
# 5. Copy the vendor folder from promu to our temp subfolder, then delete the built promu & extract the source tarball again.
# 6. Copy the vendor folder back into the extract promu folder and remove the temp subfolder.
# 7. Reinitialize the temp subfolder and switch back to prometheus. We modify web/ui to add an npm cache, and we modify Makefile.common's promu build to use our local tarball instead of the remote prom.
# 8. Then we run make build on prometheus, and save the go vendor cache after that.
# 9. We copy our npm cache and go vendor cache to the temp subfolder & remove our built prometheus. We re-extract the source tarball and copy the npm cache & go vendor cache into prometheus.
# 10. Make some changes to Makefile.common again and compress our custom prometheus and promu folders into their respective tarballs.
# 11. Print SHA256 of prometheus and promu tarballs
set -e
SRC_TARBALL=""
OUT_FOLDER="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
PKG_VERSION=""
# parameters:
#
# --srcTarball : src tarball file
# this file contains the 'initial' source code of the component
# and should be replaced with the new/modified src code
# --outFolder : folder where to copy the new tarball(s)
# --pkgVersion : package version
#
PARAMS=""
while (( "$#" )); do
case "$1" in
--srcTarball)
if [ -n "$2" ] && [ ${2:0:1} != "-" ]; then
SRC_TARBALL=$2
shift 2
else
echo "Error: Argument for $1 is missing" >&2
exit 1
fi
;;
--outFolder)
if [ -n "$2" ] && [ ${2:0:1} != "-" ]; then
OUT_FOLDER=$2
shift 2
else
echo "Error: Argument for $1 is missing" >&2
exit 1
fi
;;
--pkgVersion)
if [ -n "$2" ] && [ ${2:0:1} != "-" ]; then
PKG_VERSION=$2
shift 2
else
echo "Error: Argument for $1 is missing" >&2
exit 1
fi
;;
-*|--*=) # unsupported flags
echo "Error: Unsupported flag $1" >&2
exit 1
;;
*) # preserve positional arguments
PARAMS="$PARAMS $1"
shift
;;
esac
done
echo "--srcTarball -> $SRC_TARBALL"
echo "--outFolder -> $OUT_FOLDER"
echo "--pkgVersion -> $PKG_VERSION"
if [ -z "$PKG_VERSION" ]; then
echo "--pkgVersion parameter cannot be empty"
exit 1
fi
echo "-- create temp folder"
TEMPDIR=$(mktemp -d)
function cleanup {
echo "+++ cleanup -> remove $TEMPDIR"
rm -rf $TEMPDIR
}
trap cleanup EXIT
echo "Starting Prometheus source tarball creation"
PROMETHEUS_VERSION=$PKG_VERSION
PROMETHEUS_URL="https://github.com/prometheus/prometheus/archive/refs/tags/v$PROMETHEUS_VERSION.tar.gz"
cd "$TEMPDIR"
wget -c $PROMETHEUS_URL -O "prometheus-$PROMETHEUS_VERSION.tar.gz"
tar -xzf "prometheus-$PROMETHEUS_VERSION.tar.gz"
#PROMU_VERSION is found in prometheus-$PROMETHEUS_VERSION/Makefile.common
PROMU_VERSION=$(cat "prometheus-$PROMETHEUS_VERSION/Makefile.common" | grep "PROMU_VERSION ?= " | cut -d' ' -f3)
PROMU_URL="https://github.com/prometheus/promu/archive/refs/tags/v$PROMU_VERSION.tar.gz"
mkdir temp_vendor
wget -c $PROMU_URL -O "promu-$PROMU_VERSION.tar.gz"
tar -xzf "promu-$PROMU_VERSION.tar.gz"
cd "promu-$PROMU_VERSION"
make build
go mod vendor
cp -r vendor "$TEMPDIR/temp_vendor"
cd "$TEMPDIR"
rm -rf "promu-$PROMU_VERSION"
tar -xzf "promu-$PROMU_VERSION.tar.gz"
cp -r "temp_vendor/vendor" "promu-$PROMU_VERSION"
rm -rf "temp_vendor"
echo "cache=.npm_cache" > "prometheus-$PROMETHEUS_VERSION/web/ui/.npmrc"
sed -i "s/\$(eval PROMU_TMP := \$(shell mktemp -d))/cd ..\/promu-\$(PROMU_VERSION)/g" prometheus-$PROMETHEUS_VERSION/Makefile.common
sed -i "s/curl -s -L \$(PROMU_URL) | tar -xvzf - -C \$(PROMU_TMP)/make build/g" prometheus-$PROMETHEUS_VERSION/Makefile.common
sed -i "s/cp \$(PROMU_TMP)\/promu-\$(PROMU_VERSION).\$(GO_BUILD_PLATFORM)\/promu/cp promu-\$(PROMU_VERSION)/g" prometheus-$PROMETHEUS_VERSION/Makefile.common
sed -i "s/rm -r \$(PROMU_TMP)//g" prometheus-$PROMETHEUS_VERSION/Makefile.common
mkdir temp_vendor
cd "prometheus-$PROMETHEUS_VERSION"
make build
go mod vendor
cd "$TEMPDIR"
cp -r "prometheus-$PROMETHEUS_VERSION/vendor" temp_vendor
cp "prometheus-$PROMETHEUS_VERSION/web/ui/.npmrc" temp_vendor
cp -r "prometheus-$PROMETHEUS_VERSION/web/ui/.npm_cache" temp_vendor
rm -rf "prometheus-$PROMETHEUS_VERSION"
tar -xzf "prometheus-$PROMETHEUS_VERSION.tar.gz"
cp -r "temp_vendor/vendor" "prometheus-$PROMETHEUS_VERSION"
cp "temp_vendor/.npmrc" "prometheus-$PROMETHEUS_VERSION/web/ui"
cp -r "temp_vendor/.npm_cache" "prometheus-$PROMETHEUS_VERSION/web/ui"
rm -rf "temp_vendor"
sed -i "s/\$(eval PROMU_TMP := \$(shell mktemp -d))/cd ..\/promu-\$(PROMU_VERSION)/g" prometheus-$PROMETHEUS_VERSION/Makefile.common
sed -i "s/curl -s -L \$(PROMU_URL) | tar -xvzf - -C \$(PROMU_TMP)//g" prometheus-$PROMETHEUS_VERSION/Makefile.common
sed -i "s/cp \$(PROMU_TMP)\/promu-\$(PROMU_VERSION).\$(GO_BUILD_PLATFORM)\/promu/cp promu-\$(PROMU_VERSION)/g" prometheus-$PROMETHEUS_VERSION/Makefile.common
sed -i "s/rm -r \$(PROMU_TMP)//g" prometheus-$PROMETHEUS_VERSION/Makefile.common
tar -czf "$OUT_FOLDER/prometheus-$PROMETHEUS_VERSION.tar.gz" prometheus-$PROMETHEUS_VERSION
tar -czf "$OUT_FOLDER/promu-$PROMU_VERSION.tar.gz" promu-$PROMU_VERSION
echo "Source tarball $OUT_FOLDER/prometheus-$PROMETHEUS_VERSION.tar.gz successfully created!"