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void-packages/common/hooks/do-fetch/00-distfiles.sh
2024-03-29 08:12:19 +01:00

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# This hook downloads the distfiles specified in a template by
# the $distfiles variable and then verifies its sha256 checksum comparing
# its value with the one stored in the $checksum variable.
# Return the checksum of the contents of a tarball
contents_cksum() {
local curfile="$1" cursufx cksum
case $curfile in
*.tar.lzma) cursufx="txz";;
*.tar.lz) cursufx="tlz";;
*.tlz) cursufx="tlz";;
*.tar.xz) cursufx="txz";;
*.txz) cursufx="txz";;
*.tar.bz2) cursufx="tbz";;
*.tbz) cursufx="tbz";;
*.tar.gz) cursufx="tgz";;
*.tgz) cursufx="tgz";;
*.gz) cursufx="gz";;
*.bz2) cursufx="bz2";;
*.tar) cursufx="tar";;
*.zip) cursufx="zip";;
*.rpm) cursufx="rpm";;
*.patch) cursufx="txt";;
*.diff) cursufx="txt";;
*.txt) cursufx="txt";;
*.7z) cursufx="7z";;
*.gem) cursufx="gem";;
*.crate) cursufx="crate";;
*) msg_error "$pkgver: unknown distfile suffix for $curfile.\n";;
esac
case ${cursufx} in
tar|txz|tbz|tlz|tgz|crate)
cksum=$($XBPS_DIGEST_CMD <($TAR_CMD -x -O -f "$curfile"))
if [ $? -ne 0 ]; then
msg_error "$pkgver: extracting $curfile to pipe.\n"
fi
;;
gz)
cksum=$($XBPS_DIGEST_CMD <(gunzip -c "$curfile"))
;;
bz2)
cksum=$($XBPS_DIGEST_CMD <(bunzip2 -c "$curfile"))
;;
zip)
if command -v unzip &>/dev/null; then
cksum=$($XBPS_DIGEST_CMD <(unzip -p "$curfile"))
if [ $? -ne 0 ]; then
msg_error "$pkgver: extracting $curfile to pipe.\n"
fi
else
msg_error "$pkgver: cannot find unzip bin for extraction.\n"
fi
;;
rpm)
msg_error "$pkgver: contents checksum not support for rpm.\n"
;;
txt)
cksum=$($XBPS_DIGEST_CMD "$curfile")
;;
7z)
if command -v 7z &>/dev/null; then
cksum=$($XBPS_DIGEST_CMD <(7z x -o "$curfile"))
if [ $? -ne 0 ]; then
msg_error "$pkgver: extracting $curfile to pipe.\n"
fi
else
msg_error "$pkgver: cannot find 7z bin for extraction.\n"
fi
;;
gem)
cksum=$($XBPS_DIGEST_CMD <($TAR_CMD -x -O -f "$curfile" data.tar.gz | $TAR_CMD -xzO ))
;;
*)
msg_error "$pkgver: cannot guess $curfile extract suffix. ($cursufx)\n"
;;
esac
if [ -z "$cksum" ]; then
msg_error "$pkgver: cannot find contents checksum for $curfile.\n"
fi
echo "$cksum"
}
# Verify the checksum for $curfile stored at $distfile and index $dfcount
verify_cksum() {
local curfile="$1" distfile="$2" cksum="$3" filesum
# If the checksum starts with an commercial at (@) it is the contents checksum
if [ "${cksum:0:1}" = "@" ]; then
cksum=${cksum:1}
msg_normal "$pkgver: verifying contents checksum for distfile '$curfile'... "
filesum=$(contents_cksum "$curfile")
if [ "${cksum}" != "$filesum" ]; then
echo
msg_red "SHA256 mismatch for '${curfile}:'\n@${filesum}\n"
errors=$((errors + 1))
else
msg_normal_append "OK.\n"
fi
else
msg_normal "$pkgver: verifying checksum for distfile '$curfile'... "
filesum=$(${XBPS_DIGEST_CMD} "$distfile")
if [ "$cksum" != "$filesum" ]; then
echo
msg_red "SHA256 mismatch for '${curfile}:'\n${filesum}\n"
errors=$((errors + 1))
else
if [ ! -f "$XBPS_SRCDISTDIR/by_sha256/${cksum}_${curfile}" ]; then
mkdir -p "$XBPS_SRCDISTDIR/by_sha256"
ln -f "$distfile" "$XBPS_SRCDISTDIR/by_sha256/${cksum}_${curfile}"
fi
msg_normal_append "OK.\n"
fi
fi
}
# Link an existing cksum $distfile for $curfile at index $dfcount
link_cksum() {
local curfile="$1" distfile="$2" cksum="$3"
if [ -n "$cksum" -a -f "$XBPS_SRCDISTDIR/by_sha256/${cksum}_${curfile}" ]; then
ln -f "$XBPS_SRCDISTDIR/by_sha256/${cksum}_${curfile}" "$distfile"
msg_normal "$pkgver: using known distfile $curfile.\n"
return 0
fi
return 1
}
try_mirrors() {
local curfile="$1" distfile="$2" cksum="$3" f="$4"
local filesum basefile mirror path scheme good
[ -z "$XBPS_DISTFILES_MIRROR" ] && return 1
basefile="${f##*/}"
for mirror in $XBPS_DISTFILES_MIRROR; do
scheme="file"
if [[ $mirror == *://* ]]; then
scheme="${mirror%%:/*}"
path="${mirror#${scheme}://}"
else
path="$mirror"
fi
if [ "$scheme" == "file" ]; then
# Skip file:// mirror locations (/some/where or file:///some/where)
# where the specified directory does not exist
if [ ! -d "$path" ]; then
msg_warn "$pkgver: mount point $path does not exist...\n"
continue
fi
fi
if [[ "$mirror" == *voidlinux* ]]; then
# For distfiles.voidlinux.* append the subdirectory
mirror="$mirror/$pkgname-$version"
fi
msg_normal "$pkgver: fetching distfile '$curfile' from mirror '$mirror'...\n"
$fetch_cmd "$mirror/$curfile"
# If basefile was not found, but a curfile file may exist, try to fetch it
# if [ ! -f "$distfile" -a "$basefile" != "$curfile" ]; then
# msg_normal "$pkgver: fetching distfile '$basefile' from mirror '$mirror'...\n"
# $fetch_cmd "$mirror/$basefile"
# fi
[ ! -f "$distfile" ] && continue
flock -n ${distfile}.part rm -f ${distfile}.part
filesum=$(${XBPS_DIGEST_CMD} "$distfile")
if [ "$cksum" == "$filesum" ]; then
return 0
fi
msg_normal "$pkgver: checksum failed - removing '$curfile'...\n"
rm -f ${distfile}
done
return 1
}
try_urls() {
local curfile="$1"
local good=
for i in ${_file_idxs["$curfile"]}; do
local cksum=${_checksums["$i"]}
local url=${_distfiles["$i"]}
# If distfile does not exist, download it from the original location.
if [[ "$FTP_RETRIES" && "${url}" =~ ^ftp:// ]]; then
max_retries="$FTP_RETRIES"
else
max_retries=1
fi
for retry in $(seq 1 1 $max_retries); do
if [ ! -f "$distfile" ]; then
if [ "$retry" == 1 ]; then
msg_normal "$pkgver: fetching distfile '$curfile' from '$url'...\n"
else
msg_normal "$pkgver: fetch attempt $retry of $max_retries...\n"
fi
flock "${distfile}.part" $fetch_cmd "$url"
fi
done
if [ ! -f "$distfile" ]; then
continue
fi
# distfile downloaded, verify sha256 hash.
flock -n "${distfile}.part" rm -f "${distfile}.part"
verify_cksum "$curfile" "$distfile" "$cksum"
return 0
done
return 1
}
hook() {
local srcdir="$XBPS_SRCDISTDIR/$pkgname-$version"
local dfcount=0 dfgood=0 errors=0 max_retries
local -a _distfiles=($distfiles)
local -a _checksums=($checksum)
local -A _file_idxs
# Create a map from target file to index in _distfiles/_checksums
for i in ${!_distfiles[@]}; do
f="${_distfiles[$i]}"
curfile="${f#*>}"
curfile="${curfile##*/}"
_file_idxs["$curfile"]+=" $i"
done
if [[ ! -d "$srcdir" ]]; then
mkdir -p -m775 "$srcdir"
chgrp $(id -g) "$srcdir"
fi
cd $srcdir || msg_error "$pkgver: cannot change dir to $srcdir!\n"
# Disable trap on ERR; the code is smart enough to report errors and abort.
trap - ERR
# Detect bsdtar and GNU tar (in that order of preference)
TAR_CMD="$(command -v bsdtar)"
if [[ -z "$TAR_CMD" ]]; then
TAR_CMD="$(command -v tar)"
fi
# Detect distfiles with obsolete checksum and purge them from the cache
for f in ${!_file_idxs[@]}; do
distfile="$srcdir/$f"
for i in ${_file_idxs["$f"]}; do
if [[ -f $distfile ]]; then
cksum=${_checksums["$i"]}
if [[ ${cksum:0:1} = @ ]]; then
cksum=${cksum:1}
filesum=$(contents_cksum "$distfile")
else
filesum=$(${XBPS_DIGEST_CMD} "$distfile")
fi
if [[ $cksum = $filesum ]]; then
dfgood=$((dfgood + 1))
else
inode=$(stat_inode "$distfile")
msg_warn "$pkgver: wrong checksum found for ${curfile} - purging\n"
find ${XBPS_SRCDISTDIR} -inum ${inode} -delete -print
fi
fi
dfcount=$((dfcount + 1))
done
done
# We're done, if all distfiles were found and had good checksums
[[ $dfcount -eq $dfgood ]] && return
# Download missing distfiles and verify their checksums
for curfile in ${!_file_idxs[@]}; do
distfile="$srcdir/$curfile"
set -- ${_file_idxs["$curfile"]}
i="$1"
# If file lock cannot be acquired wait until it's available.
while ! flock -w 1 "${distfile}.part" true; do
msg_warn "$pkgver: ${curfile} is already being downloaded, waiting for 1s ...\n"
done
if [[ -f "$distfile" ]]; then
continue
fi
# If distfile does not exist, try to link to it.
if link_cksum "$curfile" "$distfile" "${_checksums[$i]}"; then
continue
fi
# If distfile does not exist, download it from a mirror location.
if try_mirrors "$curfile" "$distfile" "${_checksums[$i]}" "${_distfiles[$i]}"; then
continue
fi
if ! try_urls "$curfile"; then
msg_error "$pkgver: failed to fetch '$curfile'.\n"
fi
done
unset TAR_CMD
if [[ $errors -gt 0 ]]; then
msg_error "$pkgver: couldn't verify distfiles, exiting...\n"
fi
}