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aduh95 merged 1 commit into from
May 24, 2023
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tools: zlib update by checking latest commit #48054

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35 changes: 29 additions & 6 deletions tools/dep_updaters/update-zlib.sh
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Original file line numberDiff line numberDiff line change
@@ -1,23 +1,46 @@
#!/bin/sh
set -e
# Shell script to update zlib in the source tree to a specific version
# Shell script to update zlib in the source tree to the most recent version.
# Zlib rarely creates tags or releases, so we use the latest commit on the main branch.
# See: https://github.com/nodejs/node/pull/47417

BASE_DIR=$(cd "$(dirname "$0")/../.."&& pwd)
DEPS_DIR="$BASE_DIR/deps"

CURRENT_VERSION=$(grep "#define ZLIB_VERSION""$DEPS_DIR/zlib/zlib.h"| sed -n "s/^.*VERSION \"\(.*\)\"/\1/p")
echo"Comparing latest upstream with current revision"

NEW_VERSION_ZLIB_H=$(curl -s "https://chromium.googlesource.com/chromium/src/+/refs/heads/main/third_party/zlib/zlib.h?format=TEXT"| base64 --decode)
git fetch https://chromium.googlesource.com/chromium/src/third_party/zlib.git HEAD

NEW_VERSION=$(printf '%s'"$NEW_VERSION_ZLIB_H"| grep "#define ZLIB_VERSION"| sed -n "s/^.*VERSION \"\(.*\)\"/\1/p")
# Revert zconf.h changes before checking diff
perl -i -pe 's|^//#include "chromeconf.h"|#include "chromeconf.h"|'"$DEPS_DIR/zlib/zconf.h"
git stash -- "$DEPS_DIR/zlib/zconf.h"

echo"Comparing $NEW_VERSION with $CURRENT_VERSION"
DIFF_TREE=$(git diff --diff-filter=d 'stash@{0}:deps/zlib' FETCH_HEAD)

if [ "$NEW_VERSION"="$CURRENT_VERSION" ];then
git stash drop

if [ -z"$DIFF_TREE" ];then
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@lpincalpincaMay 20, 2023

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I think we also want to skip if we end up with echo 1 above, no?

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@aduh95aduh95May 20, 2023

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We want to skip only if we don't end up with echo 1. git diff --exit-code exit with code 0 and no output when there's no diff. That being said, we don't gain much from the --exit-code flag, I was suggesting it so we can use it directly as the test, but currently it doesn't give us much expect an additional line with the number 1 🤷‍♂️

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@lpincalpincaMay 20, 2023

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Yes, my point is that if it fails we should exit, but currently even if it fails we end up with a non empty string and continue.

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@aduh95aduh95May 20, 2023•
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Here's how I would write it:

# Revert zconf.h changes before checking diff perl -i -pe 's|^//#include "chromeconf.h"|#include "chromeconf.h"|'"$DEPS_DIR/zlib/zconf.h" git stash -- "$DEPS_DIR/zlib/zconf.h" git fetch https://chromium.googlesource.com/chromium/src/third_party/zlib.git HEAD (\ git diff --exit-code --diff-filter=d stash@{0}:deps/zlib FETCH_HEAD -- ':!zconf.h'&& \ echo"Skipped because zlib is on the latest version."&& \ git stash drop && \ exit 0 \ ) || git stash drop

The double git stash drop is a bit unsettling, but I feel that's a more straightforward way of thinking about what this code is doing (but maybe that's just me).

If we don't use the --exit-code flag:

# Revert zconf.h changes before checking diff perl -i -pe 's|^//#include "chromeconf.h"|#include "chromeconf.h"|'"$DEPS_DIR/zlib/zconf.h" git stash -- "$DEPS_DIR/zlib/zconf.h" git fetch https://chromium.googlesource.com/chromium/src/third_party/zlib.git HEAD DIFF_TREE=$(git diff --diff-filter=d stash@{0}:deps/zlib FETCH_HEAD -- ':!zconf.h') git stash drop if [ -z"$DIFF_TREE" ];thenecho"Skipped because zlib is on the latest version."exit 0 fi

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@lpincalpincaMay 20, 2023

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Without --exit-code seems cleaner and easier to understand to me.

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@fasenderosfasenderosMay 21, 2023•
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DIFF_TREE=$(git diff --diff-filter=d stash@{0}:deps/zlib FETCH_HEAD -- ':!zconf.h')

With this check, we didn't get the diff of other possible changes to zconf.h

I think we still need two checks. One for checking the entire lib without zconf, and one for checking only the re-patched zconf

DIFF_TREE=$( git diff 'stash@{0}:deps/zlib' FETCH_HEAD -- zconf.h git diff --diff-filter=d HEAD:deps/zlib FETCH_HEAD -- ':!zconf.h' )

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@aduh95aduh95May 21, 2023

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Shouldn’t it be DIFF_TREE=$(git diff stash@{0}:deps/zlib FETCH_HEAD)? stash@{0} is supposed to be exactly the same as upstream if there are no updates, no?

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@fasenderosfasenderosMay 21, 2023

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Yes you are right

echo"Skipped because zlib is on the latest version."
exit 0
fi

# This is a rather arbitrary restriction. This script is assumed to run on
# Sunday, shortly after midnight UTC. This check thus prevents pulling in the
# most recent commits if any changes were made on Friday or Saturday (UTC).
# We don't want to pull in a commit that was just pushed, and instead rather
# wait for the next week's update. If no commits have been pushed in the last
# two days, we assume that the most recent commit is stable enough to be
# pulled in.
LAST_CHANGE_DATE=$(git log -1 --format=%ct FETCH_HEAD)
TWO_DAYS_AGO=$(date -d 'now - 2 days''+%s')

if [ "$LAST_CHANGE_DATE"-gt"$TWO_DAYS_AGO" ];then
echo"Skipped because the latest version is too recent."
exit 0
fi

NEW_VERSION=$(git rev-parse --short=7 FETCH_HEAD)

echo"Making temporary workspace..."

WORKSPACE=$(mktemp -d 2> /dev/null || mktemp -d -t 'tmp')
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