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#!/bin/bash
set -e
set -u
set -o pipefail
cd "$(hg root)"
if [ ! -e .pytype ]; then
echo "no cache available" >&2
exit 0
fi
if [ ! -e .pytype/CACHE_COMMIT ]; then
echo "no cache origin information" >&2
echo "purging the cache" >&2
rm -rf .pytype
exit 0
fi
SOURCE_COMMIT=`cat .pytype/CACHE_COMMIT`
if ! hg log --rev "id($SOURCE_COMMIT)" -T 'HAS MATCH' | grep -q 'HAS MATCH' ; then
echo "unknown cache source" >&2
echo "purging the cache" >&2
rm -rf .pytype
exit 0
fi
### lets fiddle with time stamp !
# ninja use timestamp for its cache validation
changed=`hg status --no-status --removed --added --modified --rev "id($SOURCE_COMMIT)" | wc -l`
echo "reusing cache from $SOURCE_COMMIT ($changed file changes)" >&2
# first mark the cache content as newer than the repostiory content
sleep 1
find .pytype -exec touch '{}' ';'
# then update the timestamp of the file changed between the cache source and the changeset we test
sleep 1
hg status --no-status --added --modified --rev "id($SOURCE_COMMIT)" | while read f; do
touch "$f"
done
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