buildctl/entrypoint.sh
Stephan Schnabel 79d41a9020
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2025-06-07 20:14:28 +02:00

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#!/usr/bin/env bash
set -exu;
env | sort | grep -v DRONE
##
## check input
##
BUILDCTL_CONTEXT=${PLUGIN_CONTEXT:-$(pwd)}
BUILDCTL_DOCKERFILE=$(dirname "${PLUGIN_DOCKERFILE:-$BUILDCTL_CONTEXT/Dockerfile}")
if [[ ! -f $BUILDCTL_DOCKERFILE/Dockerfile ]]; then
echo "Dockerfile $BUILDCTL_DOCKERFILE/Dockerfile not found!"
exit 1
fi
BUILDCTL_FRONTEND=${PLUGIN_FRONTEND:-dockerfile.v0}
if [[ "$BUILDCTL_FRONTEND" != "dockerfile.v0" ]]; then
echo "Only frontend 'dockerfile.v0' testet and supported yet."
exit 1
fi
SOURCE_DATE_EPOCH=${PLUGIN_SOURCE_DATE_EPOCH:-0}
##
## build command
##
COMMAND="buildctl"
if [[ -n "${PLUGIN_ADDR:-}" ]]; then
COMMAND="$COMMAND --addr $PLUGIN_ADDR"
fi
COMMAND="$COMMAND build"
COMMAND="$COMMAND --frontend $BUILDCTL_FRONTEND"
COMMAND="$COMMAND --local context='$BUILDCTL_CONTEXT'"
COMMAND="$COMMAND --local dockerfile='$BUILDCTL_DOCKERFILE'"
if [[ "${PLUGIN_PLATFORM:-}" == "true" ]]; then
COMMAND="$COMMAND --opt platform='$PLUGIN_PLATFORM'"
fi
# https://github.com/moby/buildkit/blob/master/README.md#output
if [[ -n "${PLUGIN_NAME:-}" ]]; then
COMMAND="$COMMAND --output type=image,name=$PLUGIN_NAMES,push=${PLUGIN_PUSH:-true}"
fi
# custom args, e.g. docker run --rm --volume=$HOME:HOME:ro --workdir=$PWD kokuwaio/buildkit --opt buildarg=foo=bar
if [[ -n "${1:-}" ]]; then
COMMAND="$COMMAND $*"
fi
##
## execute command
##
echo -e "SOURCE_DATE_EPOCH=$SOURCE_DATE_EPOCH ${COMMAND// --/\\n --}\n"
eval "$COMMAND"