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diffmazing_cropper.sh
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#!/bin/bash
# Copyright 2018-2021 Streamlit Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# https://medium.com/factualopinions/consider-starting-all-your-bash-scripts-with-these-options-74fbec0cbb83
set -o errexit
set -o nounset
set -o pipefail
if [ $# -eq 0 ]
then
echo ""
echo "Usage"
echo " $0 <diff files to convert>"
echo ""
echo "Example"
echo " $0 ~/downloads/*.diff.png"
echo ""
exit -1
fi
has_convert=$(command -v convert) || {
echo ""
echo "Missing dependency."
echo "Please install ImageMagick first."
echo ""
exit -1
}
tmp_dir="$(mktemp -d -t streamlit_cropped_diffs-XXXXX)"
diff_files=("$@")
len=${#diff_files[@]}
# Crop diff files and put the resulting snapshot files in $tmp_dir.
# NOTE: We're using this style of "if" statement to account for filenames that have spaces in them!
for (( i=0; i<${len}; i++ ))
do
diff_file="${diff_files[$i]}"
filename=$(basename -- "$diff_file" .diff.png) # foo.diff.png -> foo
output_pattern=${filename}-%02d.png
convert "$diff_file" -crop 3x1@ "${tmp_dir}/$output_pattern"
rm "${tmp_dir}/${filename}-00.png"
rm "${tmp_dir}/${filename}-01.png"
mv "${tmp_dir}/${filename}-02.png" "${tmp_dir}/${filename}.snap.png"
echo "Created ${tmp_dir}/${filename}.snap.png"
done
# Put cropped images in the right place in the Git tree.
for snapshot_file in $tmp_dir/*
do
filename=$(basename -- "$snapshot_file")
# Get location of file in Git tree.
file_in_git=$(git ls-files '**/'"$filename")
# Put new snapshot file in old Git location.
cp "$snapshot_file" "$file_in_git"
echo "Updated $file_in_git"
done
rm -rf ${tmp_dir}
echo "Removed ${tmp_dir}"
echo ""
echo "🐣 DONE-ZO!"