Igor Murashkin | cce31f6 | 2016-03-23 11:36:10 -0700 | [diff] [blame] | 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" |
Colin Cross | f76463b | 2017-12-08 18:04:25 -0800 | [diff] [blame] | 90 | patch --quiet "$(basename "$dst_file")" "$patch_file_src" |