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After a fatal error, do not continue evaluation, but return immediately.
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Allow rules to set (additional) execution properties for individual
action. In this way the need for a special image (e.g., with
additional, maybe test-only, tools) or execution platform (e.g.,
when cross-compiling but having to execute the tests on the native
platform) can be expressed.
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A git CAS ist just a fall back, so it is OK if it is absent (e.g.,
the specificed directory does not exist). Therefore only log at
debug level, not at error level if we cannot open it.
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... which became obsolete with the new fdless write/copy
implementations.
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... to remove the risk of deadlocks on certain combinations
of C++ standard library and libc when performing the
copy/write in a child process. For 'fdless' copy/write, a
child process is used to prevent the parent from getting
polluted with open writable file descriptors (which might
get inherited by other children that keep them open and can
cause EBUSY errors).
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This feature has been introduced with C++20.
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... and in this way, continue to work correctly in the absence
of a current working directory.
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... and in this way, ensure we can lock files given by absolute
path even if we don't have a working directory. While there, drop
uncessary split just to combine of the file name.
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... also, gracefully handle the case of a missing working
directory when determining the current module, falling back
to the top-level module.
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... and set default stack size to 8 MB.
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...and fix missing origin field initialization for progress tracing.
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...and make the use of std::hash consistent.
This will make it easier to remove the fix once the libc
implementation we use catches up with the C++ standard.
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Allow rules to set the timeout-scaling factor for their actions to
indicate that some actions are expected to take longer than others,
e.g., because they call a foreign build tool or are a very complex
end-to-end test.
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As local execution is tightly coupled to storage, also specify the
layout in the storage configuration. In this way, we have a central
place specifying the layout of just's cache directory and avoid
accidentally getting into conflicting situations. While there, also
move the execution root under the generation regime, to ensure that
left-over execution directories (e.g., after a forceful termination
of the program) eventually get cleaned up by garbage collection.
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...caused by incorrectly setting and resetting the library internal
state and the misuse of pthreads in libgit2.
Normally, git_libgit2_init and git_libgit2_shutdown should span the
life of a worker thread in order to be safely used. However, due to
an incorrect implementation of libgit2's threadstate with pthreads,
on unix systems there is a race condition.
Until the use of pthread_key_t is corrected in libgit2, we need to
apply a workaround by always ensuring that the main thread is the
first thread reaching the GitContext constructor.
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... and drop unecessary IsTree() check.
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In just-mr the config file should only be needed if:
1. We call just with a subcommand requiring a config file, or
2. We use one of just-mr's own commands (except version).
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... with two minor code base changes compared to previous
use of gsl-lite:
- dag.hpp: ActionNode::Ptr and ArtifactNode::Ptr are not
wrapped in gsl::not_null<> anymore, due to lack of support
for wrapping std::unique_ptr<>. More specifically, the
move constructor is missing, rendering it impossible to
use std::vector<>::emplace_back().
- utils/cpp/gsl.hpp: New header file added to implement the
macros ExpectsAudit() and EnsureAudit(), asserts running
only in debug builds, which were available in gsl-lite but
are missing in MS GSL.
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When deciding if two archive-based repositories create the same root
it is not enough to compare the contents of the archive; it also
matters which subdirectory we will take as root. This is especially
important, if we take the same archive on the one hand for the code
and also the example subdir for testing.
Additionally, we cannot ignore the archive type; there are tar
archives that are also zip archives, but with different content. (Tar
only cares about the initial segment till it finds the two empty
blocks; zip has the index at the end and ignores any initial segment
that might have been prepended to a valid zip archive.)
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Make just-mr unconditionally support an option -D that collects a
configuration overlay and forwards it to the invocation of a just
subcommand that supports this option. This syntax-switching facility
makes it easy to embedd dynamic parts of the configuration (like
the head commit to be part of a version string) as those information
can unconditionally be the first argument to just-mr.
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From a git CAS crate an execution API unable to execute
actions or to store anything. This implementaiton of the
common interface is still useful as the execution API
is the interface used for tranfering artifacts.
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In this way, we have the whole layout of the local build root
consolidated in one place. Moreover, in this way, the location
of the git root is also available to the build tool itself and
can, e.g., be used as fallback CAS.
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As those functions indicate success, it is up to the caller to
decide if the error was fatal or not. Reporting an error nevertheless
might result in error messages on successful operaitons, which is
confusing for the user.
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... to make it readable also on white background, where yellow is hardly readable.
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- deduplicate dependencies
- remove unused dependency
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... as this is only an internal functionality, and the caller will
take care of a proper error message if the absence of that entry
is not expected.
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