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|
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Copy firmware files based on WHENCE list
#
verbose=:
compress=cat
compext=
destdir=
num_jobs=1
usage() {
echo "Usage: $0 [-v] [-jN] [--xz|--zstd] <destination directory>"
}
err() {
printf "ERROR: %s\n" "$*"
usage
exit 1
}
warn() {
printf "WARNING: %s\n" "$*"
}
has_gnu_parallel() {
command -v parallel > /dev/null || return 1
# moreutils parallel doesn't support --version; if it fails, not GNU
parallel --version > /dev/null 2>&1 || return 1
# Use tolower() instead of IGNORECASE (gawk-only extension)
parallel --version 2>/dev/null \
| awk '{if(tolower($0)~/gnu parallel/)found=1} END{exit !found}'
}
while test $# -gt 0; do
case $1 in
-v | --verbose)
verbose=echo
shift
;;
-j*)
num_jobs=$(echo "$1" | sed 's/-j//')
num_jobs=${num_jobs:-1}
if [ "$num_jobs" -gt 1 ] && ! has_gnu_parallel; then
err "the GNU parallel command is required to use -j"
fi
parallel_args_file=$(mktemp)
trap 'rm -f $parallel_args_file' EXIT INT QUIT TERM
shift
;;
--xz)
if test "$compext" = ".zst"; then
err "cannot mix XZ and ZSTD compression"
fi
compress="xz --compress --quiet --stdout --check=crc32"
compext=".xz"
shift
;;
--zstd)
if test "$compext" = ".xz"; then
err "cannot mix XZ and ZSTD compression"
fi
compress="zstd --compress --quiet --stdout"
compext=".zst"
shift
;;
-h|--help)
usage
exit 1
;;
-*)
warn "ignoring option $1"
shift
;;
*)
if test -n "$destdir"; then
err "unknown command-line options: $*"
fi
destdir="$1"
shift
;;
esac
done
if test -z "$destdir"; then
err "destination directory was not specified"
fi
if test -d "$destdir"; then
# BusyBox find does not support -empty; count entries instead
if [ "$(find "$destdir" | wc -l)" -gt 1 ]; then
warn "destination folder is not empty."
fi
fi
if test -e .git/config; then
$verbose "Checking that WHENCE file is formatted properly"
./check_whence.py || err "check_whence.py has detected errors."
fi
# sed -E is GNU-only; rewrite with basic BRE substitutions instead.
# File/RawFile lines: strip the keyword prefix and any surrounding quotes,
# then emit "K\tFILENAME" (tab-separated) so filenames with spaces are safe.
grep -E '^(RawFile|File):' WHENCE \
| sed 's/^RawFile:/RawFile/;s/^File:/File/;s/"//g' \
| awk '{k=$1; sub(/^[^ ]+ +/,""); printf "%s\t%s\n", k, $0}' \
| while IFS="$(printf '\t')" read -r k f; do
install -d "$destdir/$(dirname "$f")"
$verbose "copying/compressing file $f$compext"
if test "$compress" != "cat" && test "$k" = "RawFile"; then
$verbose "compression will be skipped for file $f"
if [ "$num_jobs" -gt 1 ]; then
printf 'cat\t%s\t%s\n' "$f" "$destdir/$f" >> "$parallel_args_file"
else
cat "$f" > "$destdir/$f"
fi
else
if [ "$num_jobs" -gt 1 ]; then
printf '%s\t%s\t%s\n' "$compress" "$f" "$destdir/$f$compext" >> "$parallel_args_file"
else
$compress "$f" > "$destdir/$f$compext"
fi
fi
done
if [ "$num_jobs" -gt 1 ]; then
# Tab-separated columns: {1}=cmd+args {2}=src {3}=dest
# parallel --colsep splits on the tab so spaces in paths are safe.
parallel -j"$num_jobs" --colsep '\t' '{1} "{2}" > "{3}"' \
< "$parallel_args_file"
printf '' > "$parallel_args_file"
fi
# Link lines look like: Link: some/name with spaces -> target with spaces
# Split on ' -> ' as a unit using awk so spaces inside names are preserved.
grep -E '^Link:' WHENCE \
| sed 's/^Link: *//' \
| awk '{
idx = index($0, " -> ")
if (idx > 0) {
printf "%s\t%s\n", substr($0,1,idx-1), substr($0,idx+4)
}
}' \
| while IFS="$(printf '\t')" read -r l t; do
directory="$destdir/$(dirname "$l")"
install -d "$directory"
# BusyBox realpath lacks -m (allow non-existent) and -s (no symlink
# resolution). Replicate by walking each component manually.
target=$(
cd "$directory" 2>/dev/null || exit 1
result=$(pwd)
set -f
IFS=/
for part in $t; do
case "$part" in
'') ;;
'.') ;;
'..') result=$(dirname "$result") ;;
*) result="$result/$part" ;;
esac
done
printf '%s\n' "$result"
)
if test -e "$target"; then
$verbose "creating link $l -> $t"
if [ "$num_jobs" -gt 1 ]; then
printf 'ln -s\t%s\t%s\n' "$t" "$destdir/$l" >> "$parallel_args_file"
else
ln -s "$t" "$destdir/$l"
fi
else
$verbose "creating link $l$compext -> $t$compext"
if [ "$num_jobs" -gt 1 ]; then
printf 'ln -s\t%s\t%s\n' \
"$t$compext" "$destdir/$l$compext" >> "$parallel_args_file"
else
ln -s "$t$compext" "$destdir/$l$compext"
fi
fi
done
if [ "$num_jobs" -gt 1 ]; then
parallel -j"$num_jobs" --colsep '\t' '{1} "{2}" "{3}"' \
< "$parallel_args_file"
fi
# Verify no broken symlinks.
# BusyBox find has no -xtype; use -type l then resolve each target manually.
# Relative targets are relative to the symlink's own directory.
find "$destdir" -type l | while read -r lnk; do
lnk_target=$(readlink "$lnk")
case "$lnk_target" in
/*) check="$lnk_target" ;;
*) check="$(dirname "$lnk")/$lnk_target" ;;
esac
if ! test -e "$check"; then
printf "ERROR: Broken symlink: %s -> %s\n" "$lnk" "$lnk_target" >&2
fi
done
find "$destdir" -type l | while read -r lnk; do
lnk_target=$(readlink "$lnk")
case "$lnk_target" in
/*) check="$lnk_target" ;;
*) check="$(dirname "$lnk")/$lnk_target" ;;
esac
test -e "$check" || exit 1
done || err "Broken symlinks found in $destdir"
exit 0
# vim: et sw=4 sts=4 ts=4
|
