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152 lines
2.9 KiB
152 lines
2.9 KiB
C_RED="$(echo -e '\e[31m')"
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C_GREEN="$(echo -e '\e[32m')"
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C_YELLOW="$(echo -e '\e[33m')"
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C_NORMAL="$(echo -e '\e[0m')"
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export DEBIAN_FRONTEND=noninteractive
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B_APT_UPDATED=
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progress ()
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{
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echo "${C_GREEN}$1${C_NORMAL}" >&2
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}
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note ()
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{
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echo "${C_YELLOW}$1${C_NORMAL}" >&2
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}
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warn ()
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{
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echo "${C_RED}WARNING: $1${C_NORMAL}" >&2
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}
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die ()
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{
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echo "${C_RED}ERROR: $1${C_NORMAL}" >&2
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exit 1
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}
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update-pkgs ()
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{
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if [ -z "$B_APT_UPDATED" ] ; then
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apt update
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B_APT_UPDATED=1
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fi
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}
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install-pkgs ()
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{
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update-pkgs
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apt install -y --no-install-recommends --no-install-suggests "$@"
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}
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install-config ()
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{
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[ $# = 2 ] || die "Usage: install-config <source> (<target-file> | <target-dir>/)"
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local S=$1
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local T=$2
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if [ ${T%/} != $T ] ; then
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T=$T$(basename $S)
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fi
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local B=$BUILD_CONFIG$T
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mkdir -p $(dirname $B) $(dirname $T)
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if [ -f $T ] ; then
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if [ ! -f $B.orig ] ; then
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echo "Backing up $T to $B.orig"
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cp $T $B.orig
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else
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echo "Backup of $T already present in $B.orig"
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fi
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fi
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if [ -f $S ] ; then
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# Just a new file: overwrite
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echo "Overwriting $T"
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cp $S $T
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cp $S $B.new
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elif [ -f $S.orig -a -f $S.new ] ; then
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# Try 3-way merge
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if cmp --quiet $S.new $T ; then
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warn "Skipping merge of $T: changes already present"
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else
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echo "Merging $T"
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if diff3 -m $S.new $S.orig $T >$B.new ; then
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cp $B.new $T
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else
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die "Merge failed, please review $B.new"
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fi
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fi
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else
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die "Do not know how to install config $T"
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fi
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}
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sed-config ()
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{
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[ $# = 2 ] || die "Usage: sed-config <target> <sed-script>"
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local T=$1
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local SCRIPT=$2
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local B=$BUILD_CONFIG$T
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mkdir -p $(dirname $B)
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[ -f $T ] || die "Want to sed $T, but it is missing"
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if [ ! -f $B.orig ] ; then
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echo "Backing up $T to $B.orig"
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cp $T $B.orig
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else
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echo "Backup of $T already present in $B.orig"
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fi
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sed -ri "$SCRIPT" $T
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cp $T $B.new
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}
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pipe-config ()
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{
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[ $# = 1 ] || die "Usage: <command> | pipe-config <target>"
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local TMP=$(mktemp)
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cat >$TMP
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install-config $TMP $1
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rm $TMP
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}
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rm-config ()
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{
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[ $# = 1 ] || die "Usage: rm-config <target>"
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local T=$1
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local B=$BUILD_CONFIG$T
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if [ -f $T ] ; then
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if [ ! -f $B.orig ] ; then
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echo "Backing up $T to $B.orig"
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cp $T $B.orig
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fi
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echo "Removing $T"
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rm -f $T
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else
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echo "Wanted to remove $T, but it does not exist"
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fi
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}
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download ()
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{
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[ $# = 3 ] || die "Usage: download <URL> <hash-type> <hash>"
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local URL=$1
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local HTYPE=$2
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local HASH=$3
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local DEST=$(basename $URL)
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local CACHE=/root/.cache/download
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if [ -d $CACHE ] ; then
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if [ -f $CACHE/$DEST ] ; then
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echo "Using cached $DEST"
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else
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echo "Downloading $URL with caching"
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curl -L $URL >$CACHE/$DEST.tmp
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mv $CACHE/$DEST.tmp $CACHE/$DEST
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fi
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ln -s $CACHE/$DEST .
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else
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warn "Cache $CACHE not found: downloading directly"
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echo "Downloading $URL"
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curl $URL >$DEST
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fi
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local H=$(${HTYPE}sum $DEST | cut -d' ' -f1)
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[ $H == $HASH ] || die "Mismatched hash: got $H, want $HASH"
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}
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