1 #!/usr/bin/env bash 2 3 # Copyright (C) 2016 The Android Open Source Project 4 # 5 # Licensed under the Apache License, Version 2.0 (the "License"); 6 # you may not use this file except in compliance with the License. 7 # You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 # 17 18 # Given a source file, for example Constructor.java, find the patch file for it and apply it. 19 # Patch is applied to a copy (as opposed to in-place), for example into a build artifact location. 20 21 if [[ $# -lt 3 ]]; then 22 echo "Usage: $(basename $0) <src-file-prefix> <src-file> <dst-file>" 23 exit 1 24 fi 25 26 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" 27 ANDROID_PATCHES_DIR="$DIR/src/patches/android" 28 29 src_file_prefix="$1" 30 src_file="$2" 31 src_file_with_prefix="$2" 32 dst_file="$3" 33 dst_dir="$(dirname "$dst_file")" 34 35 # Sanity checking 36 37 if ! [[ -d $ANDROID_PATCHES_DIR ]]; then 38 echo "FATAL: Android patch directory $ANDROID_PATCHES_DIR does not exist." >&2 39 exit 1 40 fi 41 42 if ! [[ $src_file == $src_file_prefix* ]]; then 43 echo "$src_file_prefix is not a valid prefix of $src_file" >&2 44 exit 1 45 fi 46 47 if ! [[ -f $src_file ]]; then 48 echo "Source file $src_file does not exist." >&2 49 exit 1 50 fi 51 52 # Remove the src file prefix, giving us the correct grep target for the .patch files. 53 src_file="${src_file#$src_file_prefix}" 54 55 patch_file_src=$(grep --files-with-matches -R "diff --git a/$src_file" "$ANDROID_PATCHES_DIR") 56 if [[ $? -ne 0 ]]; then 57 echo "Error: Could not find a corresponding .patch file for $src_file" >&2 58 exit 1 59 fi 60 61 # Parse the source file from the .patch file (assumes exactly one file diff per .patch file) 62 src_file_check=$(cat "$patch_file_src" | grep "diff --git a/" | sed -e "s:diff --git a\/::g" | sed -e "s: b\/.*::g") 63 64 65 if ! [[ -f $patch_file_src ]]; then 66 echo "Patch file $patch_file_src does not exist." >&2 67 exit 1 68 fi 69 70 if ! cat "$patch_file_src" | grep "diff --git a/" > /dev/null; then 71 echo "File $patch_file_src is not a valid diff file" >&2 72 exit 1 73 fi 74 75 if [[ $src_file != $src_file_check ]]; then 76 echo "Check-fail: $src_file was not same as found in patch file ($src_file_check)" >&2 77 exit 1 78 fi 79 80 set -e 81 82 # Copy the src file and then apply the patch to it. 83 mkdir -p "$dst_dir" 84 cp "$src_file_with_prefix" "$dst_file" 85 if ! [[ -f "$dst_file" ]]; then 86 echo "File "$dst_file" does not exist; patching will fail" >&2 87 exit 1 88 fi 89 cd "$dst_dir" 90 patch "$(basename "$dst_file")" "$patch_file_src" 91 echo "Successfully applied patch $patch_file_src into copy of file $dst_file" 92
