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phabricator: warn if unable to amend, instead of aborting after posting...

phabricator: warn if unable to amend, instead of aborting after posting There was a divergence in behavior here between obsolete and strip based amending. I first noticed the abort when testing outside of the test harness, but then had trouble recreating it here after reverting the code changes. It turns out, strip based amend was successfully amending the public commit after it was posted! It looks like the protection is in the `commit --amend` command, not in the underlying code that it calls. I considered doing a preflight check and aborting. But the locks are only acquired at the end, if amending, and this is too large a section of code to be wrapped in a maybe-it's-held-or-not context manager for my tastes. Additionally, some people do post-push reviews, and amending is the default behavior, so they shouldn't see a misleading error message. The lack of a 'Differential Revision' entry in the commit message breaks a {phabreview} test, so it had to be partially conditionalized.

Augie Fackler - - Load All Authors

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      #require test-repo

        $ cd $TESTDIR/../contrib/fuzz

      which(1) could exit nonzero, but that's fine because we'll still end

      up without a valid executable, so we don't need to check $? here.

        $ if which gmake >/dev/null 2>&1; then

        >     MAKE=gmake

        > else

        >     MAKE=make

        > fi

        $ havefuzz() {

        >     cat > $TESTTMP/dummy.cc <<EOF

        > #include <stdlib.h>

        > #include <stdint.h>

        > int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { return 0; }

        > int main(int argc, char **argv) {

        >     const char data[] = "asdf";

        >     return LLVMFuzzerTestOneInput((const uint8_t *)data, 4);

        > }

        > EOF

        >     $CXX $TESTTMP/dummy.cc -o $TESTTMP/dummy \

        >        -fsanitize=fuzzer-no-link,address || return 1

        > }

      #if clang-libfuzzer

        $ CXX=clang++ havefuzz || exit 80

        $ $MAKE -s clean all

      #endif

      #if no-clang-libfuzzer clang-6.0

        $ CXX=clang++-6.0 havefuzz || exit 80

        $ $MAKE -s clean all CC=clang-6.0 CXX=clang++-6.0

      #endif

      #if no-clang-libfuzzer no-clang-6.0

        $ exit 80

      #endif

      Just run the fuzzers for five seconds each to verify it works at all.

        $ ./bdiff -max_total_time 5

        $ ./mpatch -max_total_time 5

        $ ./xdiff -max_total_time 5

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				#require test-repo

				$ cd $TESTDIR/../contrib/fuzz

				which(1) could exit nonzero, but that's fine because we'll still end
				up without a valid executable, so we don't need to check $? here.

				$ if which gmake >/dev/null 2>&1; then
				> MAKE=gmake
				> else
				> MAKE=make
				> fi

				$ havefuzz() {
				> cat > $TESTTMP/dummy.cc <<EOF
				> #include <stdlib.h>
				> #include <stdint.h>
				> int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { return 0; }
				> int main(int argc, char **argv) {
				> const char data[] = "asdf";
				> return LLVMFuzzerTestOneInput((const uint8_t *)data, 4);
				> }
				> EOF
				> $CXX $TESTTMP/dummy.cc -o $TESTTMP/dummy \
				> -fsanitize=fuzzer-no-link,address \|\| return 1
				> }

				#if clang-libfuzzer
				$ CXX=clang++ havefuzz \|\| exit 80
				$ $MAKE -s clean all
				#endif
				#if no-clang-libfuzzer clang-6.0
				$ CXX=clang++-6.0 havefuzz \|\| exit 80
				$ $MAKE -s clean all CC=clang-6.0 CXX=clang++-6.0
				#endif
				#if no-clang-libfuzzer no-clang-6.0
				$ exit 80
				#endif

				Just run the fuzzers for five seconds each to verify it works at all.
				$ ./bdiff -max_total_time 5
				$ ./mpatch -max_total_time 5
				$ ./xdiff -max_total_time 5