Removes unnecessary stuff in base-builder image to create a base-builder-new, and then adds a base-builder-swift on top of this that swift projects can use (without JVM/Go/etc fuzzing).
* [CIFuzz] Allow run_fuzzers to use a preexisting corpus.
Also improve comment in cifuzz-base/Dockerfile.
* improve comment
* Fix run_fuzzers
Add --cache option to helper.py's build_image command which
uses the docker image cache when building and use this in
ci/build.py.
Change build_image_impl's argument no_cache to cache for clarity.
Eliminate default argument cache in build_fuzzers_impl since no users
use it.
This will help us catch breaking changes to the base-images.
Unfortunately caching seems to fail here when I expect it to help.
For example, base-builder doesn't build from cache when I do it locally.
This means that every other image I try to build doesn't use the cache.
That means that base-clang would take forever to rebuild.
So to compromise, I don't rebuild base-clang here.
This means that this PR won't catch breaking changes to base-image or base-clang that break in base-builder.
But it will catch breaking changes to base-image that break in base-runner and it will catch breaking changes to base-runner and base-builder.
[CI] Build a canary project on infra/ changes.
Build a specific project, sckms, that does msan, ubsan, asan, i386
builds quickly, when infra/ code is changed. This can let us know
when infra/ changes break proper functioning of OSS-Fuzz.
For this to work more thoroughly we also need to rebuild images.
Coverage builds need to be special cased since they aren't specified
in sanitizers. Instead they are done for all C/C++ projects that
use libFuzzer.
Move all of this special casing to `should_build_coverage` and call that from
`should_build` so we have one place where we decide this.
Add tests as well.
Fixes: https://github.com/google/oss-fuzz/issues/4371
* [util-linux] cover mnt_table_parse_stream
Waiting for https://github.com/karelzak/util-linux/pull/1068
* temporarily point OSS-Fuzz to evverx/util-linux
* make sure it can be built with sanitizer=coverage
asraa