status-go/_assets/patches/patcher

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#!/usr/bin/env bash
# Default behaviour:
# Reverts all patches in patch dir, notes down the ones
# which were previously applied. Applies all from the beginning
# and reports about previously unapplied patches. If there's
# an error, reverts the last one and stops.
#
# Usage: ./patcher -b <base_path> -r -v
# -b: <base_path> is the target location relative to which patches will be applied
# -p: <patch_path> is where to take the patches from (default is geth)
# -r: reverts all and exit if this flag is present
# -c: reverts all to see what's applied, applies all previously applied back again,
# reports unapplied patches in this branch by comparing with "develop" including
# uncommitted ones and exits (with 1 if there are any)
# -v: verbose error reporting about failed patch
#
# If -b is not present, default path is as below ($basepath).
dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
# Patches path is geth unless specified.
patches=("$dir"/geth/*.patch)
# Use this branch as a reference for comparing patches
# in current branch (-c option).
baseBranch="develop"
# Base path is vendor/github.com/ethereum/go-ethereum
# unless specified.
basepath="vendor/github.com/ethereum/go-ethereum"
gitApply() {
f=$1
basepath=$2
verbose=$3
if [ $verbose -eq 1 ]; then
if [ $basepath == "." ]; then
git apply "$f"
else
git apply "$f" --directory="$basepath"
fi
else
if [ $basepath == "." ]; then
git apply "$f" > /dev/null 2>&1
else
git apply "$f" --directory="$basepath" > /dev/null 2>&1
fi
fi
}
gitApplyReverse() {
f=$1
basepath=$2
if [ $basepath == "." ]; then
git apply "$f" -R > /dev/null 2>&1
else
git apply "$f" --directory="$basepath" -R > /dev/null 2>&1
fi
}
verbose=0
revert=0
compare=0
while getopts b:p:rcv opt; do
case $opt in
b)
basepath=$OPTARG
;;
p)
patches=("$dir"/$OPTARG/*.patch)
;;
r)
revert=1
;;
c)
compare=1
;;
v)
verbose=1
;;
\?)
echo "Invalid flag: -$OPTARG" >&2
exit
;;
esac
done
if [ $revert -eq 1 ]; then
# Reverts in reverse order and exits.
for ((i=${#patches[@]}-1; i>=0; i--)); do
gitApplyReverse "${patches[$i]}" "$basepath" 0
done
echo "Reverted all."
exit
fi
if [ $compare -eq 1 ]; then
applied=()
unapplied=()
# Finds applied patches using reverse order and
# notes them down.
for ((i=${#patches[@]}-1; i>=0; i--)); do
f=${patches[$i]}
gitApplyReverse "$f" "$basepath"
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if [ $? -ne 0 ]; then
unapplied+=("$f")
else
applied+=("$f")
fi
done
# Applies reverted patches back again.
for ((i=${#applied[@]}-1; i>=0; i--)); do
f=${applied[$i]}
gitApply "$f" "$basepath" 0
done
# Sorts out new patches' paths by comparing with base branch.
fromBaseBranch=($(git diff $baseBranch --stat | grep "\\.patch" |
while IFS=" " read -r -a line; do
path="$(pwd)/${line[0]}"
echo "$path"
done
))
# Also does the same with uncommitted.
uncommitted=($(git status -u --porcelain | grep "\\.patch" |
while IFS=" " read -r -a line; do
length=${#line[@]}
path="$(pwd)/${line[$((length - 1))]}"
echo "$path"
done
))
newPatches=( "${fromBaseBranch[@]}" "${uncommitted[@]}" )
# Checks new patches and exits with 1 if there are unapplied.
hasUnapplied=0
for newPatch in "${newPatches[@]}"; do
for unapp in "${unapplied[@]}"; do
if [ "$unapp" == "$newPatch" ]; then
echo "Recently added/changed but not applied: $unapp"
hasUnapplied=1
break
fi
done
done
exit $hasUnapplied
fi
applied=()
echo -en "\\n"
echo "Previously applied:"
echo "==================="
# Reverts every patch in reverse order to see
# which was previously applied.
for ((i=${#patches[@]}-1; i>=0; i--)); do
f=${patches[$i]}
gitApplyReverse "$f" "$basepath"
if [ $? -eq 0 ]; then
applied+=("$f")
echo "$f"
fi
done
echo "==================="
echo -en "\\n"
# Applies every patch from the beginning.
for ((i=0; i<${#patches[@]}; i++)); do
f=${patches[$i]}
# If not applied, report it new.
has=0
for patch in "${applied[@]}"; do
if [ "$patch" == "$f" ]; then
has=1
break
fi
done
if [ $has -eq 0 ]; then
echo "Applying new: $f"
echo -en "\\n"
fi
gitApply "$f" "$basepath" $verbose
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if [ $? -ne 0 ]; then
echo "Failed and reverting: $f"
gitApplyReverse "$f" "$basepath"
echo -en "\\n"
exit 1
fi
done
echo -en "\\n"
echo "Done."