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#!/bin/bash
set -eu
TARGET_INFO_FILE="$(realpath $1)"
if [ ! -f $TARGET_INFO_FILE ]; then
echo "File $TARGET_INFO_FILE doesn't exist. Creating new one"
if [ "$2" == "" ]; then
echo "Expected source folder as the second argument" >&2
exit
fi
if [ ! -d "$2" ]; then
echo "Expected $2 to be a directory" >&2
exit
fi
FROM=$(realpath $2)
GIT_ROOT=$(cd $FROM; git rev-parse --show-toplevel)
HEAD=$(cd $FROM; git rev-parse HEAD)
# Normalize FROM relativly to the git root
GIT_FROM=${FROM#$GIT_ROOT/}
echo "$HEAD;$GIT_FROM" > $TARGET_INFO_FILE
echo "Filled in $TARGET_INFO_FILE"
exit
fi
IFS=';' read -r BASE_REV GIT_FROM < "$TARGET_INFO_FILE"
TO=$(dirname $(realpath "$TARGET_INFO_FILE"))
HEAD_REV=$(cd $TO; git rev-parse HEAD)
GIT_ROOT=$(cd $TO; git rev-parse --show-toplevel)
FROM="$GIT_ROOT/$GIT_FROM"
GIT_TO=${TO#$GIT_ROOT/}
DATETIME=$(date '+%Y-%m-%d-%H-%M-%S')
echo "Base revision: $BASE_REV"
echo "Head revision: $HEAD_REV"
echo "Git root: $GIT_ROOT"
echo "Source: $GIT_FROM"
echo "Target: $GIT_TO"
if [ "$(cd $TO; git status -s -u | wc -l)" != "0" ]; then
echo "Target $TO has uncommited changes" >&2
exit
fi
cd $GIT_ROOT
PATCH_FILE=$(mktemp)
EXPORT_DIR=$(mktemp -d)
echo "Use $EXPORT_DIR export dir"
git clone --no-hardlinks "$GIT_ROOT/.git" "$EXPORT_DIR"
(cd $EXPORT_DIR; git reset --hard $BASE_REV)
rsync -r --delete --filter='. -' "$EXPORT_DIR/$GIT_FROM/" "$TO" << EOF
+ /*/
+ *.md
+ toc_*.yaml
- /*
EOF
rm -rf "$EXPORT_DIR" || true
git add -A $GIT_TO
git diff --cached --binary -R --relative=$GIT_TO > $PATCH_FILE
git reset --hard
git clean -d -f
git status
rsync -r --delete --filter='. -' "$FROM/" "$TO" << EOF
+ /*/
+ *.md
+ toc_*.yaml
P _assets/*
- /*
EOF
patch -d "$TO" -p1 -N -E --no-backup-if-mismatch --merge -i $PATCH_FILE -t || echo "Patch has conflicts. Consider to review them before commit"
if [ "$(cd $TO; git status -s -u | wc -l)" != "0" ]; then
echo "$HEAD_REV;$GIT_FROM" > $TARGET_INFO_FILE
else
echo "Nothing changed"
fi
if [ -v KEEP_PATCH ]; then
mv "$PATCH_FILE" "$TO/$DATETIME.patch"
else
rm "$PATCH_FILE"
fi
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