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#!/usr/bin/env bash
#
# Updates the *.gemspec in the current directory to use the latest releases of gems
#
set -uf -o pipefail
IFS=$'\n'
gemspec=$(find . -type f -maxdepth 1 -name "*.gemspec")
add_dependency_lines=$(cat ${gemspec} | grep "s.add_dependency '[^']*', '")
if [ $? -ne 0 ]; then
# No add_dependency_lines found - nothing to do
exit 0
fi
set -e
gems=$(echo "${add_dependency_lines}" | tr -s ' ' | cut -d ' ' -f3 | cut -d"'" -f 2)
while read -r gem; do
gem_line=$(gem list "${gem}" --remote --all --no-prerelease | grep "${gem}")
latest_version=$(echo "${gem_line}" | cut -d'(' -f2 | cut -d',' -f1)
cat "${gemspec}" | sed "s/s.add_dependency '${gem}', .*/s.add_dependency '${gem}', '~> ${latest_version}'/" > ${gemspec}.tmp
mv ${gemspec}.tmp ${gemspec}
done <<< "${gems}"
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