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160 lines
7.1 KiB
160 lines
7.1 KiB
#!/usr/bin/env bash
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export LC_ALL=C
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set -e -o pipefail
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# GUIX_BUILD_OPTIONS is an environment variable recognized by guix commands that
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# can perform builds. This seems like what we want instead of
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# ADDITIONAL_GUIX_COMMON_FLAGS, but the value of GUIX_BUILD_OPTIONS is actually
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# _appended_ to normal command-line options. Meaning that they will take
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# precedence over the command-specific ADDITIONAL_GUIX_<CMD>_FLAGS.
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#
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# This seems like a poor user experience. Thus we check for GUIX_BUILD_OPTIONS's
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# existence here and direct users of this script to use our (more flexible)
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# custom environment variables.
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if [ -n "$GUIX_BUILD_OPTIONS" ]; then
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cat << EOF
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Error: Environment variable GUIX_BUILD_OPTIONS is not empty:
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'$GUIX_BUILD_OPTIONS'
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Unfortunately this script is incompatible with GUIX_BUILD_OPTIONS, please unset
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GUIX_BUILD_OPTIONS and use ADDITIONAL_GUIX_COMMON_FLAGS to set build options
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across guix commands or ADDITIONAL_GUIX_<CMD>_FLAGS to set build options for a
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specific guix command.
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See contrib/guix/README.md for more details.
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EOF
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exit 1
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fi
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# Determine the maximum number of jobs to run simultaneously (overridable by
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# environment)
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MAX_JOBS="${MAX_JOBS:-$(nproc)}"
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# Download the depends sources now as we won't have internet access in the build
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# container
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make -C "${PWD}/depends" -j"$MAX_JOBS" download ${V:+V=1} ${SOURCES_PATH:+SOURCES_PATH="$SOURCES_PATH"}
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# Determine the reference time used for determinism (overridable by environment)
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SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git log --format=%at -1)}"
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# Execute "$@" in a pinned, possibly older version of Guix, for reproducibility
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# across time.
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time-machine() {
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# shellcheck disable=SC2086
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guix time-machine --url=https://github.com/dongcarl/guix.git \
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--commit=b066c25026f21fb57677aa34692a5034338e7ee3 \
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--max-jobs="$MAX_JOBS" \
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${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"} \
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${ADDITIONAL_GUIX_COMMON_FLAGS} ${ADDITIONAL_GUIX_TIMEMACHINE_FLAGS} \
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-- "$@"
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}
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# Function to be called when building for host ${1} and the user interrupts the
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# build
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int_trap() {
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cat << EOF
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** INT received while building ${1}, you may want to clean up the relevant
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output, deploy, and distsrc-* directories before rebuilding
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Hint: To blow everything away, you may want to use:
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$ git clean -xdff --exclude='/depends/SDKs/*'
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Specifically, this will remove all files without an entry in the index,
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excluding the SDK directory. Practically speaking, this means that all ignored
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and untracked files and directories will be wiped, allowing you to start anew.
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EOF
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}
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# Deterministically build Bitcoin Core for HOSTs (overridable by environment)
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# shellcheck disable=SC2153
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for host in ${HOSTS=x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu x86_64-w64-mingw32}; do
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# Display proper warning when the user interrupts the build
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trap 'int_trap ${host}' INT
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(
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# Required for 'contrib/guix/manifest.scm' to output the right manifest
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# for the particular $HOST we're building for
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export HOST="$host"
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# Run the build script 'contrib/guix/libexec/build.sh' in the build
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# container specified by 'contrib/guix/manifest.scm'.
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#
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# Explanation of `guix environment` flags:
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#
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# --container run command within an isolated container
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#
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# Running in an isolated container minimizes build-time differences
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# between machines and improves reproducibility
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#
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# --pure unset existing environment variables
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#
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# Same rationale as --container
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#
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# --no-cwd do not share current working directory with an
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# isolated container
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#
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# When --container is specified, the default behavior is to share
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# the current working directory with the isolated container at the
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# same exact path (e.g. mapping '/home/satoshi/bitcoin/' to
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# '/home/satoshi/bitcoin/'). This means that the $PWD inside the
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# container becomes a source of irreproducibility. --no-cwd disables
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# this behaviour.
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#
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# --share=SPEC for containers, share writable host file system
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# according to SPEC
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#
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# --share="$PWD"=/bitcoin
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#
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# maps our current working directory to /bitcoin
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# inside the isolated container, which we later cd
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# into.
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#
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# While we don't want to map our current working directory to the
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# same exact path (as this introduces irreproducibility), we do want
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# it to be at a _fixed_ path _somewhere_ inside the isolated
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# container so that we have something to build. '/bitcoin' was
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# chosen arbitrarily.
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#
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# ${SOURCES_PATH:+--share="$SOURCES_PATH"}
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#
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# make the downloaded depends sources path available
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# inside the isolated container
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#
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# The isolated container has no network access as it's in a
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# different network namespace from the main machine, so we have to
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# make the downloaded depends sources available to it. The sources
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# should have been downloaded prior to this invocation.
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#
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# ${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"}
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#
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# fetch substitute from SUBSTITUTE_URLS if they are
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# authorized
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#
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# Depending on the user's security model, it may be desirable to use
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# substitutes (pre-built packages) from servers that the user trusts.
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# Please read the README.md in the same directory as this file for
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# more information.
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#
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# shellcheck disable=SC2086
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time-machine environment --manifest="${PWD}/contrib/guix/manifest.scm" \
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--container \
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--pure \
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--no-cwd \
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--share="$PWD"=/bitcoin \
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--expose="$(git rev-parse --git-common-dir)" \
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${SOURCES_PATH:+--share="$SOURCES_PATH"} \
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--max-jobs="$MAX_JOBS" \
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${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"} \
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${ADDITIONAL_GUIX_COMMON_FLAGS} ${ADDITIONAL_GUIX_ENVIRONMENT_FLAGS} \
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-- env HOST="$host" \
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MAX_JOBS="$MAX_JOBS" \
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SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:?unable to determine value}" \
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${V:+V=1} \
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${SOURCES_PATH:+SOURCES_PATH="$SOURCES_PATH"} \
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bash -c "cd /bitcoin && bash contrib/guix/libexec/build.sh"
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)
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done
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