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Rando scripts
Andrew Couch edited this page Jan 17, 2018
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The following code snippets are for general reuse.
Some more scripts can be found here too: https://github.com/cockroachdb/scripts
- Configure git to fetch PRs (particularly nice with
git log --decorate). Add this magic line under the existingfetchline for your GitHub remote in$repo/.git/config:
fetch = +refs/pull/*/head:refs/pull/origin/*
- Get a PR locally, or create a PR from the current branch.
Courtesy of @tamird.
TODO:refuse to create a PR if the current branch diverged from the tracker.
#!/usr/bin/env sh set -eu error_message() { ret=$? if [ $ret -ne 0 ]; then echo "Something went wrong. Did you push your branch? Did you set a remote tracking branch?" fi exit $ret } trap error_message EXIT if [ $# == 0 ]; then branch_name=$(git rev-parse --abbrev-ref HEAD) remote_name=$(git config branch."$branch_name".remote) github_forked_org_name=$(git config remote."$remote_name".url | sed -E -e 's,^(https://|git@)github.com[:/]([^\./]+)/[^\./]+(\.git)?,2,円') github_origin_proj_url=$(git config remote.origin.url | sed -E -e 's,^(https://|git@)github.com[:/]([^\./]+/[^\./]+)(\.git)?,2,円') url="https://github.com/$github_origin_proj_url/compare/master...$github_forked_org_name:$branch_name?expand=" open "$url" else hub fetch origin refs/pull/"1ドル"/head:pr/"1ドル" && hub checkout pr/"1ドル" fi
- Determine the variables which are escaping to the heap for a given file. Courtesy of @nvanbenschoten.
#!/usr/bin/env bash set -eu if [ $# -eq 0 ] then echo "usage: goescape <filename>" exit 1 fi FILEPATH="1ドル" DIR=$(dirname "$FILEPATH") FILE=$(basename "$FILEPATH") pushd "$DIR" > /dev/null touch "$FILE" go build -gcflags='-m' 2>&1 | \ grep 'to heap' | \ grep "./$FILE" popd > /dev/null
Taking this one step further, we can annotate a source file with information on heap allocations:
WHAT=./storage/engine/mvcc.go goescape "${WHAT}" | awk -F: '{ print "-e " 2ドル "," 2ドル "\"s~$~ /* heap:" 4ドル " */~\"" }' | cat - <(echo "${WHAT}") | xargs sed -i
Which, in this example, would create diffs which look like this:
@@ -1283,7 +1283,7 @@ func MVCCMerge( key roachpb.Key, timestamp hlc.Timestamp, value roachpb.Value, -) error { +) error { /* heap: timestamp */ if len(key) == 0 { return emptyKeyError() } @@ -1324,8 +1324,8 @@ func MVCCDeleteRange( txn *roachpb.Transaction, returnKeys bool, ) ([]roachpb.Key, error) { - var keys []roachpb.Key - num := int64(0) + var keys []roachpb.Key /* heap: keys */ + num := int64(0) /* heap: num */ buf := newPutBuffer() iter := engine.NewIterator(true) f := func(kv roachpb.KeyValue) (bool, error) { @@ -2119,7 +2119,7 @@ func MVCCFindSplitKey( logf("searching split key for %d [%s, %s)", rangeID, key, endKey) // Get range size from stats. - var ms enginepb.MVCCStats + var ms enginepb.MVCCStats /* heap: ms */ if err := MVCCGetRangeStats(ctx, engine, rangeID, &ms); err != nil {
- Hate how Github collapses all comments that are not on the most recent commit? Use this javascript code to quickly open all the old comments. You can add this to a bookmark on Chrome, just set the URL to the code below.
javascript: (function() {var list = document.getElementsByClassName("outdated-diff-comment-container"); for (var i = 0; i < list.length; i++) {list[i].classList.add("open");} ;}());`