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Diffstat (limited to 'contrib/guix/guix-build')
| -rwxr-xr-x | contrib/guix/guix-build | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/contrib/guix/guix-build b/contrib/guix/guix-build new file mode 100755 index 0000000000..5b3c20b234 --- /dev/null +++ b/contrib/guix/guix-build @@ -0,0 +1,432 @@ +#!/usr/bin/env bash +export LC_ALL=C +set -e -o pipefail + +# Source the common prelude, which: +# 1. Checks if we're at the top directory of the Bitcoin Core repository +# 2. Defines a few common functions and variables +# +# shellcheck source=libexec/prelude.bash +source "$(dirname "${BASH_SOURCE[0]}")/libexec/prelude.bash" + + +################### +## SANITY CHECKS ## +################### + +################ +# Required non-builtin commands should be invocable +################ + +check_tools cat mkdir make git guix + +################ +# GUIX_BUILD_OPTIONS should be empty +################ +# +# GUIX_BUILD_OPTIONS is an environment variable recognized by guix commands that +# can perform builds. This seems like what we want instead of +# ADDITIONAL_GUIX_COMMON_FLAGS, but the value of GUIX_BUILD_OPTIONS is actually +# _appended_ to normal command-line options. Meaning that they will take +# precedence over the command-specific ADDITIONAL_GUIX_<CMD>_FLAGS. +# +# This seems like a poor user experience. Thus we check for GUIX_BUILD_OPTIONS's +# existence here and direct users of this script to use our (more flexible) +# custom environment variables. +if [ -n "$GUIX_BUILD_OPTIONS" ]; then +cat << EOF +Error: Environment variable GUIX_BUILD_OPTIONS is not empty: + '$GUIX_BUILD_OPTIONS' + +Unfortunately this script is incompatible with GUIX_BUILD_OPTIONS, please unset +GUIX_BUILD_OPTIONS and use ADDITIONAL_GUIX_COMMON_FLAGS to set build options +across guix commands or ADDITIONAL_GUIX_<CMD>_FLAGS to set build options for a +specific guix command. + +See contrib/guix/README.md for more details. +EOF +exit 1 +fi + +################ +# The git worktree should not be dirty +################ + +if ! git diff-index --quiet HEAD -- && [ -z "$FORCE_DIRTY_WORKTREE" ]; then +cat << EOF +ERR: The current git worktree is dirty, which may lead to broken builds. + + Aborting... + +Hint: To make your git worktree clean, You may want to: + 1. Commit your changes, + 2. Stash your changes, or + 3. Set the 'FORCE_DIRTY_WORKTREE' environment variable if you insist on + using a dirty worktree +EOF +exit 1 +fi + +mkdir -p "$VERSION_BASE" + +################ +# Build directories should not exist +################ + +# Default to building for all supported HOSTs (overridable by environment) +export HOSTS="${HOSTS:-x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu powerpc64-linux-gnu powerpc64le-linux-gnu + x86_64-w64-mingw32 + x86_64-apple-darwin18}" + +# Usage: distsrc_for_host HOST +# +# HOST: The current platform triple we're building for +# +distsrc_for_host() { + echo "${DISTSRC_BASE}/distsrc-${VERSION}-${1}" +} + +# Accumulate a list of build directories that already exist... +hosts_distsrc_exists="" +for host in $HOSTS; do + if [ -e "$(distsrc_for_host "$host")" ]; then + hosts_distsrc_exists+=" ${host}" + fi +done + +if [ -n "$hosts_distsrc_exists" ]; then +# ...so that we can print them out nicely in an error message +cat << EOF +ERR: Build directories for this commit already exist for the following platform + triples you're attempting to build, probably because of previous builds. + Please remove, or otherwise deal with them prior to starting another build. + + Aborting... + +Hint: To blow everything away, you may want to use: + + $ ./contrib/guix/guix-clean + +Specifically, this will remove all files without an entry in the index, +excluding the SDK directory, the depends download cache, the depends built +packages cache, the garbage collector roots for Guix environments, and the +output directory. +EOF +for host in $hosts_distsrc_exists; do + echo " ${host} '$(distsrc_for_host "$host")'" +done +exit 1 +else + mkdir -p "$DISTSRC_BASE" +fi + +################ +# When building for darwin, the macOS SDK should exists +################ + +for host in $HOSTS; do + case "$host" in + *darwin*) + OSX_SDK="$(make -C "${PWD}/depends" --no-print-directory HOST="$host" print-OSX_SDK | sed 's@^[^=]\+=@@g')" + if [ -e "$OSX_SDK" ]; then + echo "Found macOS SDK at '${OSX_SDK}', using..." + else + echo "macOS SDK does not exist at '${OSX_SDK}', please place the extracted, untarred SDK there to perform darwin builds, exiting..." + exit 1 + fi + ;; + esac +done + +################ +# Check that we can connect to the guix-daemon +################ + +cat << EOF +Checking that we can connect to the guix-daemon... + +Hint: If this hangs, you may want to try turning your guix-daemon off and on + again. + +EOF +if ! guix gc --list-failures > /dev/null; then +cat << EOF + +ERR: Failed to connect to the guix-daemon, please ensure that one is running and + reachable. +EOF +exit 1 +fi + +# Developer note: we could use `guix repl` for this check and run: +# +# (import (guix store)) (close-connection (open-connection)) +# +# However, the internal API is likely to change more than the CLI invocation + + +######### +# SETUP # +######### + +# Determine the maximum number of jobs to run simultaneously (overridable by +# environment) +JOBS="${JOBS:-$(nproc)}" + +# Usage: host_to_commonname HOST +# +# HOST: The current platform triple we're building for +# +host_to_commonname() { + case "$1" in + *darwin*) echo osx ;; + *mingw*) echo win ;; + *linux*) echo linux ;; + *) exit 1 ;; + esac +} + +# Determine the reference time used for determinism (overridable by environment) +SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git log --format=%at -1)}" + +# Execute "$@" in a pinned, possibly older version of Guix, for reproducibility +# across time. +time-machine() { + # shellcheck disable=SC2086 + guix time-machine --url=https://github.com/dongcarl/guix.git \ + --commit=490e39ff303f4f6873a04bfb8253755bdae1b29c \ + --cores="$JOBS" \ + --keep-failed \ + --fallback \ + ${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"} \ + ${ADDITIONAL_GUIX_COMMON_FLAGS} ${ADDITIONAL_GUIX_TIMEMACHINE_FLAGS} \ + -- "$@" +} + + +# Precious directories are those which should not be cleaned between successive +# guix builds +depends_precious_dir_names='SOURCES_PATH BASE_CACHE SDK_PATH' +precious_dir_names="${depends_precious_dir_names} OUTDIR_BASE PROFILES_BASE" + +# Usage: contains IFS-SEPARATED-LIST ITEM +contains() { + for i in ${1}; do + if [ "$i" = "${2}" ]; then + return 0 # Found! + fi + done + return 1 +} + +# If the user explicitly specified a precious directory, create it so we +# can map it into the container +for precious_dir_name in $precious_dir_names; do + precious_dir_path="${!precious_dir_name}" + if [ -n "$precious_dir_path" ]; then + if [ ! -e "$precious_dir_path" ]; then + mkdir -p "$precious_dir_path" + elif [ -L "$precious_dir_path" ]; then + echo "ERR: ${precious_dir_name} cannot be a symbolic link" + exit 1 + elif [ ! -d "$precious_dir_path" ]; then + echo "ERR: ${precious_dir_name} must be a directory" + exit 1 + fi + fi +done + +mkdir -p "$VAR_BASE" + +# Record the _effective_ values of precious directories such that guix-clean can +# avoid clobbering them if appropriate. +# +# shellcheck disable=SC2046,SC2086 +{ + # Get depends precious dir definitions from depends + make -C "${PWD}/depends" \ + --no-print-directory \ + -- $(printf "print-%s\n" $depends_precious_dir_names) + + # Get remaining precious dir definitions from the environment + for precious_dir_name in $precious_dir_names; do + precious_dir_path="${!precious_dir_name}" + if ! contains "$depends_precious_dir_names" "$precious_dir_name"; then + echo "${precious_dir_name}=${precious_dir_path}" + fi + done +} > "${VAR_BASE}/precious_dirs" + +# Make sure an output directory exists for our builds +OUTDIR_BASE="${OUTDIR_BASE:-${VERSION_BASE}/output}" +mkdir -p "$OUTDIR_BASE" + +# Download the depends sources now as we won't have internet access in the build +# container +for host in $HOSTS; do + make -C "${PWD}/depends" -j"$JOBS" download-"$(host_to_commonname "$host")" ${V:+V=1} ${SOURCES_PATH:+SOURCES_PATH="$SOURCES_PATH"} +done + +# Usage: outdir_for_host HOST +# +# HOST: The current platform triple we're building for +# +outdir_for_host() { + echo "${OUTDIR_BASE}/${1}" +} + +# Usage: profiledir_for_host HOST COMMAND +# +# HOST: The current platform triple we're building for +# +profiledir_for_host() { + echo "${PROFILES_BASE}/${2}-${1}" +} + + +######### +# BUILD # +######### + +# Function to be called when building for host ${1} and the user interrupts the +# build +int_trap() { +cat << EOF +** INT received while building ${1}, you may want to clean up the relevant + work directories (e.g. distsrc-*) before rebuilding + +Hint: To blow everything away, you may want to use: + + $ ./contrib/guix/guix-clean + +Specifically, this will remove all files without an entry in the index, +excluding the SDK directory, the depends download cache, the depends built +packages cache, the garbage collector roots for Guix environments, and the +output directory. +EOF +} + +# Deterministically build Bitcoin Core +# shellcheck disable=SC2153 +for host in $HOSTS; do + + # Display proper warning when the user interrupts the build + trap 'int_trap ${host}' INT + + ( + # Required for 'contrib/guix/manifest.scm' to output the right manifest + # for the particular $HOST we're building for + export HOST="$host" + + # shellcheck disable=SC2030 +cat << EOF +INFO: Building ${VERSION:?not set} for platform triple ${HOST:?not set}: + ...using reference timestamp: ${SOURCE_DATE_EPOCH:?not set} + ...running at most ${JOBS:?not set} jobs + ...from worktree directory: '${PWD}' + ...bind-mounted in container to: '/bitcoin' + ...in build directory: '$(distsrc_for_host "$HOST")' + ...bind-mounted in container to: '$(DISTSRC_BASE=/distsrc-base && distsrc_for_host "$HOST")' + ...outputting in: '$(outdir_for_host "$HOST")' + ...bind-mounted in container to: '$(OUTDIR_BASE=/outdir-base && outdir_for_host "$HOST")' +EOF + + # Run the build script 'contrib/guix/libexec/build.sh' in the build + # container specified by 'contrib/guix/manifest.scm'. + # + # Explanation of `guix environment` flags: + # + # --container run command within an isolated container + # + # Running in an isolated container minimizes build-time differences + # between machines and improves reproducibility + # + # --pure unset existing environment variables + # + # Same rationale as --container + # + # --no-cwd do not share current working directory with an + # isolated container + # + # When --container is specified, the default behavior is to share + # the current working directory with the isolated container at the + # same exact path (e.g. mapping '/home/satoshi/bitcoin/' to + # '/home/satoshi/bitcoin/'). This means that the $PWD inside the + # container becomes a source of irreproducibility. --no-cwd disables + # this behaviour. + # + # --share=SPEC for containers, share writable host file system + # according to SPEC + # + # --share="$PWD"=/bitcoin + # + # maps our current working directory to /bitcoin + # inside the isolated container, which we later cd + # into. + # + # While we don't want to map our current working directory to the + # same exact path (as this introduces irreproducibility), we do want + # it to be at a _fixed_ path _somewhere_ inside the isolated + # container so that we have something to build. '/bitcoin' was + # chosen arbitrarily. + # + # ${SOURCES_PATH:+--share="$SOURCES_PATH"} + # + # make the downloaded depends sources path available + # inside the isolated container + # + # The isolated container has no network access as it's in a + # different network namespace from the main machine, so we have to + # make the downloaded depends sources available to it. The sources + # should have been downloaded prior to this invocation. + # + # --keep-failed keep build tree of failed builds + # + # When builds of the Guix environment itself (not Bitcoin Core) + # fail, it is useful for the build tree to be kept for debugging + # purposes. + # + # ${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"} + # + # fetch substitute from SUBSTITUTE_URLS if they are + # authorized + # + # Depending on the user's security model, it may be desirable to use + # substitutes (pre-built packages) from servers that the user trusts. + # Please read the README.md in the same directory as this file for + # more information. + # + # shellcheck disable=SC2086,SC2031 + time-machine environment --manifest="${PWD}/contrib/guix/manifest.scm" \ + --container \ + --pure \ + --no-cwd \ + --share="$PWD"=/bitcoin \ + --share="$DISTSRC_BASE"=/distsrc-base \ + --share="$OUTDIR_BASE"=/outdir-base \ + --expose="$(git rev-parse --git-common-dir)" \ + ${SOURCES_PATH:+--share="$SOURCES_PATH"} \ + ${BASE_CACHE:+--share="$BASE_CACHE"} \ + ${SDK_PATH:+--share="$SDK_PATH"} \ + --cores="$JOBS" \ + --keep-failed \ + --fallback \ + --link-profile \ + --root="$(profiledir_for_host "${HOST}" build)" \ + ${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"} \ + ${ADDITIONAL_GUIX_COMMON_FLAGS} ${ADDITIONAL_GUIX_ENVIRONMENT_FLAGS} \ + -- env HOST="$host" \ + DISTNAME="$DISTNAME" \ + JOBS="$JOBS" \ + SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:?unable to determine value}" \ + ${V:+V=1} \ + ${SOURCES_PATH:+SOURCES_PATH="$SOURCES_PATH"} \ + ${BASE_CACHE:+BASE_CACHE="$BASE_CACHE"} \ + ${SDK_PATH:+SDK_PATH="$SDK_PATH"} \ + DISTSRC="$(DISTSRC_BASE=/distsrc-base && distsrc_for_host "$HOST")" \ + OUTDIR="$(OUTDIR_BASE=/outdir-base && outdir_for_host "$HOST")" \ + DIST_ARCHIVE_BASE=/outdir-base/dist-archive \ + bash -c "cd /bitcoin && bash contrib/guix/libexec/build.sh" + ) + +done |