https://ccache.dev/manual/3.7.11.html#_configuration uses CCACHE_DIR to set
cache directory. CCACHE_PATH has a different meaning.
+ removed LLVM_CCACHE_DIR ccache argument to use CCACHE_DIR from env.
+ print additional info about ccache config and machine readable stats.
- configured sccache on buildkite windows machines
- final result is sent to phabricator from "summary.py" that waits for both builds to complete
- extracted "add_url_artifact" to a runnable script
- reorganized code and fixed some of TODOs
* added cmake parameters for sccache
* added sccache
* removed stray debug output
* starting sccache with VS environment
* added container for Visual Studio 2019
* fixed comments
* considering WIndows version
* updated to vs2019
* using MS install method
* snapshot of VS2019 experiments
* using --installRecommended
* cleanup of dockerfile
* updated path
* fixed dockerfile
* dumped version number
* exclude for virus scan
* added testing option
this does not start the agent
* write results on failures
* added timeouts for pipelines
* moving master pipelines to python scripts
* added flang to automatic project selection
based on #159, this will enable flang for beta testers
* added persistent workspace for testing containers
* added secure delete function
* added better log message
* deleting read-only files
* checking existence before setting flags
* using unlink
* deleting recursively
* using pathlib for chmod
* using custom workspace
* fixed drive
* separate handling of single files
* simplified read-only handling again
* removed vsdevcmd calls
as it's already set in the docker Entrypoint
* renamed container folders
* windows version not needed any more
* bumped version number
* bumped version number
* script cleanup
* added cmake parameters for sccache
* added sccache
* starting sccache with VS environment
* added container for Visual Studio 2019
* fixed comments
* considering WIndows version
* updated to vs2019
* using MS install method
* snapshot of VS2019 experiments
* using --installRecommended
* cleanup of dockerfile
* updated path
* fixed dockerfile
* dumped version number
* removed vsdevcmd calls
as it's already set in the docker Entrypoint
* renamed container folders
* windows version not needed any more
* bumped version number
* bumped version number
* script cleanup
* removed sccache from vs2017
* making windows image configurable
* added versioning
* created windows BETA pipeline
* added Jenkins label for vs2019
* run_cmake.py working locally on Linux
* added os detection of choose_projects
* cmake works on windows
* run_ninja works on windows
* fixed newline characters
