Bump main to 7.0.0~pre1

[chapulina]

Part of gazebo-tooling/release-tools#459

[codecov]

Codecov Report

Merging #1094 (401b091) into main (30df078) will decrease coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 401b091 differs from pull request most recent head 1fb53d8. Consider uploading reports for the commit 1fb53d8 to get more accurate results

@@            Coverage Diff             @@
##             main    #1094      +/-   ##
==========================================
- Coverage   64.11%   64.07%   -0.04%     
==========================================
  Files         255      255              
  Lines       19994    19994              
==========================================
- Hits        12819    12812       -7     
- Misses       7175     7182       +7     

Impacted Files	Coverage Δ
src/gui/plugins/plot_3d/Plot3D.cc	43.47% <0.00%> (-4.35%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 30df078...1fb53d8. Read the comment docs.

[mabelzhang]

Focal CI is failing.

I think the fix is to change this line in examples/standalone/gtest_setup/CMakeLists.txt to 7:

set(IGN_GAZEBO_VER 6)

or better, use the same pattern as the other examples:

find_package(ignition-gazebo7 REQUIRED)
set(IGN_GAZEBO_VER ${ignition-gazebo7_VERSION_MAJOR})

The errors are:

  [  FAILED  ] Plugins/ExamplesBuild.Build/1, where GetParam() = "standalone" (90440 ms)
  [----------] 2 tests from Plugins/ExamplesBuild (189044 ms total)
  
  [----------] Global test environment tear-down
  [==========] 2 tests from 1 test suite ran. (189044 ms total)
  [  PASSED  ] 1 test.
  [  FAILED  ] 1 test, listed below:
  [  FAILED  ] Plugins/ExamplesBuild.Build/1, where GetParam() = "standalone"

  CMake Error at CMakeLists.txt:7 (find_package):
    By not providing "Findignition-gazebo6.cmake" in CMAKE_MODULE_PATH this
    project has asked CMake to find a package configuration file provided by
    "ignition-gazebo6", but CMake did not find one.
  
    Could not find a package configuration file provided by "ignition-gazebo6"
    with any of the following names:
  
      ignition-gazebo6Config.cmake
      ignition-gazebo6-config.cmake
  
    Add the installation prefix of "ignition-gazebo6" to CMAKE_PREFIX_PATH or
    set "ignition-gazebo6_DIR" to a directory containing one of the above
    files.  If "ignition-gazebo6" provides a separate development package or
    SDK, be sure it has been installed.

A second error I'm not sure what it's talking about:

  [Dbg] [examples_build.cc:164] Source: /github/workspace/examples/standalone/gtest_setup
  [Dbg] [examples_build.cc:170] Build directory: /tmp/l2yWzm
  /github/workspace/test/integration/examples_build.cc:177: Failure
  Expected equality of these values:
    system(cmd)
      Which is: 256
    0
  gtest_setup

[chapulina]

INTEGRATION_examples_build is timing out on Focal actions. I think it's not related to this PR, we probably have too many examples and have to bump the timeout. I think that can come in a separate PR, and will probably need to target earlier versions too.