contrib/guix/guix-build
#!/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 getent curl 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)
# powerpc64le-linux-gnu currently disabled due non-determinism issues across build arches.
export HOSTS="${HOSTS:-x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu powerpc64-linux-gnu
x86_64-w64-mingw32
x86_64-apple-darwin arm64-apple-darwin}"
# Usage: distsrc_for_host HOST
#
# HOST: The current platform triple we're building for
#
distsrc_for_host() {
echo "${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 exist
################
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 '${OSX_SDK}', using..."
break
else
echo "macOS SDK does not exist at '${OSX_SDK}', please place the extracted, untarred SDK there to perform darwin builds, or define SDK_PATH environment variable. Exiting..."
exit 1
fi
;;
esac
done
################
# VERSION_BASE should have enough space
################
avail_KiB="$(df -Pk "$VERSION_BASE" | sed 1d | tr -s ' ' | cut -d' ' -f4)"
total_required_KiB=0
for host in $HOSTS; do
case "$host" in
*darwin*) required_KiB=440000 ;;
*mingw*) required_KiB=7600000 ;;
*) required_KiB=6400000 ;;
esac
total_required_KiB=$((total_required_KiB+required_KiB))
done
if (( total_required_KiB > avail_KiB )); then
total_required_GiB=$((total_required_KiB / 1048576))
avail_GiB=$((avail_KiB / 1048576))
echo "Performing a Bitcoin Core Guix build for the selected HOSTS requires ${total_required_GiB} GiB, however, only ${avail_GiB} GiB is available. Please free up some disk space before performing the build."
exit 1
fi
################
# Check that we can connect to the guix-daemon
################
cat << EOF
Checking that we can connect to the guix-daemon...
Hint: If this hangs, you may want to try turning your guix-daemon off and on
again.
EOF
if ! guix gc --list-failures > /dev/null; then
cat << EOF
ERR: Failed to connect to the guix-daemon, please ensure that one is running and
reachable.
EOF
exit 1
fi
# Developer note: we could use `guix repl` for this check and run:
#
# (import (guix store)) (close-connection (open-connection))
#
# However, the internal API is likely to change more than the CLI invocation
################
# Services database must have basic entries
################
if ! getent services http https ftp > /dev/null 2>&1; then
cat << EOF
ERR: Your system's C library cannot find service database entries for at least
one of the following services: http, https, ftp.
Hint: Most likely, /etc/services does not exist yet (common for docker images
and minimal distros), or you don't have permissions to access it.
If /etc/services does not exist yet, you may want to install the
appropriate package for your distro which provides it.
On Debian/Ubuntu: netbase
On Arch Linux: iana-etc
For more information, see: getent(1), services(5)
EOF
fi
#########
# SETUP #
#########
# Determine the maximum number of jobs to run simultaneously (overridable by
# environment)
JOBS="${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:-$(git -c log.showSignature=false log --format=%at -1)}"
# Precious directories are those which should not be cleaned between successive
# guix builds
depends_precious_dir_names='SOURCES_PATH BASE_CACHE SDK_PATH'
precious_dir_names="${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 SUFFIX
#
# HOST: The current platform triple we're building for
#
outdir_for_host() {
echo "${OUTDIR_BASE}/${1}${2:+-${2}}"
}
# Usage: profiledir_for_host HOST SUFFIX
#
# HOST: The current platform triple we're building for
#
profiledir_for_host() {
echo "${PROFILES_BASE}/${1}${2:+-${2}}"
}
#########
# 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")'
ADDITIONAL FLAGS (if set)
ADDITIONAL_GUIX_COMMON_FLAGS: ${ADDITIONAL_GUIX_COMMON_FLAGS}
ADDITIONAL_GUIX_ENVIRONMENT_FLAGS: ${ADDITIONAL_GUIX_ENVIRONMENT_FLAGS}
ADDITIONAL_GUIX_TIMEMACHINE_FLAGS: ${ADDITIONAL_GUIX_TIMEMACHINE_FLAGS}
EOF
# Run the build script 'contrib/guix/libexec/build.sh' in the build
# container specified by 'contrib/guix/manifest.scm'.
#
# Explanation of `guix shell` 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 shell --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}")" \
${SUBSTITUTE_URLS:+--substitute-urls="$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