On 30 May 2019, at 3:12, Andreas Stieger wrote:
I'm looking to update my precommit hook to reject commits that are
larger than x megabytes.
The proposed transaction is passed as a parameter to the hook.
Hand that to svnlook (svnlook -t $TXN changed), and iterate over all
entries.
Filter out deletions and directory changes.
For each file get size (svnlook -t $TXN filesize) and sum it up.
Evaluate and return hook as required.
Very late followup here :), but my coworker finally did this and here it
is in case it can help anyone else:
```
# Detect and reject very large commits
# Total and maximum commit size in bytes
MAX_COMMIT_SIZE=500000000
# For each item in the commit transaction, filter out deletions, get the
size and sum it up:
# 'svnlook changed' output starts with a status code (?, A, D, U, _U,
UU) followed by the paths of files that were added/removed/changed
# Out of this output only two filepaths should be removed, deletions
(status code 'D') and folders (filepath ending with '/')
SVN_STAT_OUTPUT=`${SVNLOOK} changed -t "${TRANSACTION}" "${REPOS_PATH}"
| egrep $'^[^D]' `
echo $SVN_STAT_OUTPUT | cut -c 2- | while read item
do
# Get size of each item, in theory all items are exclusively files
or folder
# Note the '2> /dev/null' this is used to ignore stderr output from
trying to get the size of a folder.. perhaps not the most elegant way of
handling errors
# However since ITEM_SIZE will not increase if given a folder as
parameter, simply ignoring stderr output handles the situation just
fine.
ITEM_SIZE=$(${SVNLOOK} filesize -t "${TRANSACTION}" "${REPOS_PATH}"
"${item}" )
sum=$((ITEM_SIZE + total))
echo "$sum" > /tmp/svn_sum.txt
done
TOTAL=`cat /tmp/svn_sum.txt`
if [ ${TOTAL} -gt ${MAX_COMMIT_SIZE} ]; then
echo "Commit blocked! Your commit size is $TOTAL bytes, the maximum
size is $MAX_COMMIT_SIZE bytes." 1>&2
exit 4
fi
# All checks passed, so allow the commit.
exit 0
```
