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openscreen/docs/roll_deps.md
Wei4 Wang ba66153da9 [OpenScreen] Add googleurl as a third_party dependency. 
According to [1], QUICHE depends on googleurl. In order to convert
OSP QUIC to QUICHE, this CL adds googleurl as a third_party dependency
firstly.

[1] https://source.chromium.org/chromium/chromium/src/+/main:net/third_party/quiche/src/WORKSPACE.bazel;l=48

Bug: b/169447969
Change-Id: Ib03f6920d5d4540f9c64e15cf034fefe5bf41fa8
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/4730307
Reviewed-by: Mark Foltz <mfoltz@chromium.org>
Commit-Queue: Mark Foltz <mfoltz@chromium.org>
2023-08-22 17:19:35 +00:00

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Updating Dependencies

The Open Screen Library uses several external libraries that are compiled from source and fetched from additional git repositories into folders below third_party/. These libraries are listed in the DEPS file in the root of the repository. (DEPS listed with dep_type: cipd are not managed through git.)

Periodically the versions of these libraries are updated to pick up bug and security fixes from upstream repositories.

Note that depot_tools is in the process of migrating dependency management from DEPS to git submodules.

The process is roughly as follows:

  1. Identify the git commit for the new version of the library that you want to roll.
    • For libraries that are also used by Chromium, prefer rolling to the same version listed in Chromium DEPS. These libraries are listed below.
    • For other libraries, prefer the most recent stable or general availability release.
  2. Use the roll-dep script to update the git hashes in DEPS and the corresponding git submodule.
    • This will generate and upload a CL to Gerrit.
    • Example: roll-dep -r jophba --roll-to 229b04537a191ce272a96734b0f4ddcccc31f241 third_party/quiche/src
    • More documentation in Rolling Dependencies
  3. Update your CL if needed, such as updating the BUILD.gn file for the corresponding library to handle files moving around, compiler flag adjustments, etc.
  4. Use a tryjob to verify that nothing is broken and send for code review.

Libraries also used by Chromium

  • third_party/libprotobuf-mutator/src
  • third_party/jsoncpp/src
  • third_party/googletest/src (not kept in sync with Chromium, see comment in DEPS)
  • third_party/quiche/src
  • third_party/abseil/src (not kept in sync with Chromium, see comment in DEPS)
  • third_party/libfuzzer/src
  • third_party/googleurl/src (not kept in sync with Chromium, see comment in DEPS)

Special cases that are updated manually

  • third_party/protobuf: See instructions in third-party/protobuf/README.chromium
  • third_party/boringssl/src: See instructions in third_party/boringssl/README.openscreen.md
  • third_party/mozilla: See README.md