feather/contrib/guix/libexec/prelude.bash

85 lines
2.3 KiB
Bash

#!/usr/bin/env bash
export LC_ALL=C
set -e -o pipefail
# shellcheck source=contrib/shell/realpath.bash
source contrib/shell/realpath.bash
# shellcheck source=contrib/shell/git-utils.bash
source contrib/shell/git-utils.bash
################
# Required non-builtin commands should be invocable
################
check_tools() {
for cmd in "$@"; do
if ! command -v "$cmd" > /dev/null 2>&1; then
echo "ERR: This script requires that '$cmd' is installed and available in your \$PATH"
exit 1
fi
done
}
check_tools cat env readlink dirname basename git
################
# We should be at the top directory of the repository
################
same_dir() {
local resolved1 resolved2
resolved1="$(bash_realpath "${1}")"
resolved2="$(bash_realpath "${2}")"
[ "$resolved1" = "$resolved2" ]
}
if ! same_dir "${PWD}" "$(git_root)"; then
cat << EOF
ERR: This script must be invoked from the top level of the git repository
Hint: This may look something like:
env FOO=BAR ./contrib/guix/guix-<blah>
EOF
exit 1
fi
################
# Execute "$@" in a pinned, possibly older version of Guix, for reproducibility
# across time.
time-machine() {
# shellcheck disable=SC2086
guix time-machine --url=https://github.com/tobtoht/guix.git \
--commit=6c86ae62a0ea12e49eddaa3b541340d1ec8e56a2 \
--cores="$JOBS" \
--keep-failed \
--fallback \
${SUBSTITUTE_URLS:+--substitute-urls="$SUBSTITUTE_URLS"} \
${ADDITIONAL_GUIX_COMMON_FLAGS} ${ADDITIONAL_GUIX_TIMEMACHINE_FLAGS} \
-- "$@"
}
################
# Set common variables
################
VERSION="${FORCE_VERSION:-$(git_head_version)}"
DISTNAME="${DISTNAME:-feather-${VERSION}}"
VERSION_BASE_DIR="${VERSION_BASE_DIR:-${PWD}}"
version_base_prefix="${VERSION_BASE_DIR}/guix/guix-build-"
VERSION_BASE="${version_base_prefix}${VERSION}" # TOP
DISTSRC_BASE="${DISTSRC_BASE:-${VERSION_BASE}}"
OUTDIR_BASE="${OUTDIR_BASE:-${VERSION_BASE}/output}"
LOGDIR_BASE="${LOGDIR_BASE:-${VERSION_BASE}/logs}"
var_base_basename="var"
VAR_BASE="${VAR_BASE:-${VERSION_BASE}/${var_base_basename}}"
profiles_base_basename="profiles"
PROFILES_BASE="${PROFILES_BASE:-${VAR_BASE}/${profiles_base_basename}}"