helm/bin/ag-replace
2014-09-04 15:50:42 -04:00

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#!/usr/bin/env bash
# A simple script that uses ag <https://github.com/ggreer/the_silver_searcher> and perl
# to do a project-wide search/replace.
#
# Usage: ag-replace [pattern] [replace]
sanitize() {
echo "$1" | sed -e "s_/_\\\/_g"
}
input=$(sanitize "$1")
replace=$(sanitize "$2")
RED=$(printf "\033[31m")
GREEN=$(printf "\033[32m")
NC=$(printf "\033[0m")
# Do a dry run for analysis
ag "$1" -s --nocolor --nogroup > /tmp/ag-repl
num=`cat /tmp/ag-repl | wc -l | sed -e "s/ //g"`
rm -rf /tmp/ag-repl
if [ "$num" -eq 0 ]; then
echo "No results were found!"
exit 1
fi
# Show the search/replace results
ag "$1" $3 -s --group --nocolor --nobreak \
| perl -pe "s/(?<=.)$input/\033[4m$RED$replace$NC/g" \
| perl -pe "s/^([^:]+)/$GREEN\$1$NC/g"
# Ask for confirmation
echo
echo -n "Apply $num changes? (y/n) "
read -n1 REPLY
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
# Now actually do the search replace! This is destructive. No, no backups are made.
# You better have read the earlier prompt!
files=`ag "$1" $3 -s --nogroup --nocolor --files-with-matches`
out=`echo "$files" | xargs perl -pi -e "s/$input/$replace/g"`
echo "$files" | sed -e "s/^/ ✓ /g"
echo
echo "$num changes made!"
else
echo "Aborted!"
exit 2
fi