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121 lines
3.0 KiB
121 lines
3.0 KiB
# --- SDE-COPYRIGHT-NOTE-BEGIN ---
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# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
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#
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# Filename: lib/overlay/overlay-functions.in
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# Copyright (C) 2007 - 2012 The OpenSDE Project
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#
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# More information can be found in the files COPYING and README.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License. A copy of the
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# GNU General Public License can be found in the file COPYING.
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# --- SDE-COPYRIGHT-NOTE-END ---
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# returns the type of overlay based on the extension of the overlay file
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#
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overlay_get_type() {
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local ext="${1##*.}"
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case "$ext" in
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sh|exec) echo "exec" ;;
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txt|patch|ln|bin|rm)
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echo "$ext" ;;
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*) # and skip anything else
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;;
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esac
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}
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# returns the name of a target file based on the name overlay file
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#
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overlay_get_filename() {
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local filename="${1##*/}"; filename="${filename%.*}"
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# rock_substitute will add a leading / for most translations
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echo "${filename}" | tr '_%' '/_' | rock_substitute | sed -e 's,^/,,'
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}
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# apply an overlay dir
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overlay_apply() {
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local overlaydir= rootfs=
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local file= source= target= xtarget= ext=
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local type= mode= ref= targetdir=
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local patchopt="-p1 --no-backup-if-mismatch -N"
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local overwrite=yes echo_status=echo_status
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while [ $# -gt 0 ]; do
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case "$1" in
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-n) overwrite= ;;
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-q) echo_status=echo ;;
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--) shift; break ;;
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-*) echo_warning "overlay_apply: $1: invalid option." ;;
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*) break ;;
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esac
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shift
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done
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overlaydir="$1" rootfs="${2:-$root}"
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for file in "$overlaydir"/*; do
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# only consider known overlay types
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type=$( overlay_get_type "$file" )
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[ -n "$type" ] || continue
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# full filename of the target file, and it's directory
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target=$( overlay_get_filename "$file" )
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xtarget="$rootfs/$target" targetdir="${xtarget%/*}"
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if [ -L "$xtarget" -o -e "$xtarget" ]; then
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if [ "$type" != rm -a "$overwrite" != yes ]; then
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$echo_status "skipping $target ($type)"
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continue
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fi
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if [ "$type" = patch ]; then
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:
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elif [ ! -d "$xtarget/" ]; then
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rm -f "$xtarget"
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else
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rm -rf "$xtarget"
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fi
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fi
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# final adjustments based on the type
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case "$type" in
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exec) mode=0755 ;;
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*) mode=0644 ;;
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esac
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[ "$type" = "patch" ] || mkdir -p "$targetdir"
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# and finally inject the file
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case "$type" in
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bin|exec|txt)
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$echo_status "injecting $target ($type)"
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if [ "$type" = bin ]; then
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cp "$file" "$xtarget"
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else
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cat "$file" | rock_substitute > "$xtarget"
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fi
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chmod $mode "$xtarget"
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;;
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ln) ref=$( cat "$file" | rock_substitute )
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$echo_status "injecting $target -> $ref"
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ln -snf "$ref" "$xtarget"
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;;
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rm)
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$echo_status "removing $target"
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;;
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patch)
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$echo_status "overlay: patching $target"
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rock_substitute "$file" | patch $patchopt "$xtarget"
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;;
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esac
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# flist hackery... needed?
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case "$type" in
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patch|rm) ;;
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*) add_flist "$xtarget" ;;
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esac
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done
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}
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