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chgserver: catch Abort while parsing early args to shut down cleanly _loadnewui() calls dispatcher functions, which may raise Abort if unparsable arguments are passed in. The server should catch such errors and translate them to the "exit 255" instruction so the client can finish the IPC session cleanly. Spotted while porting the chg client to Rust.

chg: upgrade client to use "setumask2" command No compatibility code is added to the client side, since it's unlikely for new client to communicate with the old server.

chgserver: add "setumask2" command which uses correct message frame The first 4 bytes should be a length field, not a value. Spotted while porting chg functions to the Rust one.

packaging: "make deb" no longer fails Release 4.7 rationalized the layout of the build scripts. Unfortunately, while "make docker-ubuntu-*" and "make docker-debian-*" worked as expected, "make deb" was broken. Before this change "make deb" was failing with the following error: You are not inside a Mercurial repository! Or, after the latest changes: You are inside <fullpath>, which is not the root of a Mercurial repository Moreover, when "make deb" failed, the cleanup routine deleted the wrong directory (contrib/packaging/debian instead of <reporoot>/debian) resulting in a corrupted working copy that needed to be hg revert-ed. After this change the docker targets continue to work, and the deb one is able to finish.

packaging: cleanup() did not read the value of $CLEANUP When the original author put CLEANUP in a conditional statement he was probably willing to use it to control the "if". This change tries to restore that behaviour: the "rm" clause is triggered if and only if CLEANUP is defined and not empty.

packaging: builddeb's cleanup needs to expand PWD, safely Single quotes would not expand the variable.

packaging: blindly factor out trap's cleanup function in builddeb This commit blindly extracts builddeb's trap routine in a dedicated function. While doing so, I think two bugs are exposed, which will be addressed in the next commits: - single quoting around '$CLEANUP' will always evaluate to the literal '$CLEANUP' regardless of the variable's value. The "if" will always be true. - the removal operation will not expand $PWD (and a variable expansion would need double quotes, anyways.

packaging: print full path to the packages when builddeb finishes successfully

packaging: print more specific error messages when builddeb fails

cmdutil: sort unresolved paths I noticed that `hg status` was printing unresolved paths in a non-deterministic order. This patch fixes that. I'm not sure if the sorting should be done in merge.mergestate.unresolved() instead. Either way fixes the presentation issue. Differential Revision: https://phab.mercurial-scm.org/D4929

fuzz: report error if Python code raised exception I think that's what we wanted to do, given the most of the code block is surrounded by try-except. 'lazymanifest(mdata)' is moved to the try block as it can fail.

revlog: explicitly initialize static variables I know .bss section is zero-filled, but explicit initialization should be better as we rely on that.

tests: do not change sys.path, it can break loading cext.parsers When running this tests with run-tests, the prefix would resolve mercurial.cext to the source tree and the attempt to load mercurial.cext.parsers would therefore fail since it doesn't exist in it. With the regular search path from run-tests, it is picked up from the temporary prefix correctly. Differential Revision: https://phab.mercurial-scm.org/D4910

tests: deal with differences in tic from ncurses and NetBSD Differential Revision: https://phab.mercurial-scm.org/D4909

closehead: fix close-head -r listification Differential Revision: https://phab.mercurial-scm.org/D4908

import-checker: use testparseutil.embedded() to centralize detection logic This patch fixes issues of embedded() in import-checker.py below, too. - overlook (or mis-detect) the end of inline script in doctest style - overlook inline script in doctest style at the end of file (and ignore invalid un-closed heredoc at the end of file, too) - overlook code fragment in styles below - "python <<EOF" (heredoc should be "cat > file <<EOF" style) - "cat > foobar.py << ANYLIMIT" (limit mark should be "EOF") - "cat << EOF > foobar.py" (filename should be placed before limit mark) - "cat >> foobar.py << EOF" (appending is ignored)

tests: use NO_CHECK_EOF as heredoc limit mark to omit checking code fragments This patch uses NO_CHECK_EOF as heredoc limit mark instead of EOF, in order to avoid checking all python code fragments in test-contrib-check-code.t, because almost all of them has un-recommended implementations intentionally.

contrib: add an utility module to parse test scripts This patch centralizes the logic to pick up code fragments embedded in *.t script, in order to: - apply checking with patterns in check-code.py on such embedded code fragments Now, check-code.py completely ignores embedded code fragments. I'll post another patch series to check them. - replace similar code path in contrib/import-checker.py Current import-checker.py has problems below. Fixing each of them is a little difficult, because parsing logic and pattern strings are tightly coupled. - overlook (or mis-detect) the end of inline script in doctest style 8a8dd6e4a97a fixed a part of this issue, but not enough. - it overlooks inline script in doctest style at the end of file (and ignores invalid un-closed heredoc at the end of file, too) - it overlooks code fragment in styles below - "python <<EOF" (heredoc should be "cat > file <<EOF" style) - "cat > foobar.py << ANYLIMIT" (limit mark should be "EOF") - "cat << EOF > foobar.py" (filename should be placed before limit mark) - "cat >> foobar.py << EOF" (appending is ignored) - it is not extensible for other than python code fragments (e.g. shell script, hgrc file, and so on) This new module can detect python code fragments in styles below: - inline script in doctest style (starting by " >>> " line) - python invocation with heredoc script ("python <<EOF") - python script in heredoc style (redirected into ".py" file) As an example of extensibility of new module, this patch also contains implementation to pick up code fragment below. This will be useful to add additional restriction for them, for example. - shell script in heredoc style (redirected into ".sh" file) - hgrc configuration in heredoc style (redirected into hgrc or $HGRCPATH)

tests: use environment variable indirectly Using environment variable directly in heredoc python code will cause syntax error at checking module importation by import-checker.py strictly, because "$varname" is invalid in Python syntax. "$varname" becomes valid after environment variable substitution by shell at writing text into file. Current import-checker.py overlooks code fragment changed in this patch, because of a restriction below for a line starting code fragment. - filename must be specified before limit mark NG: cat <<EOF > FILE.py OK: cat > FILE.py <<EOF import-checker.py itself is fixed in subsequent patch.

tests: import multiple modules separately Current import-checker.py overlooks code fragment changed in this patch, because of restrictions below for a line starting code fragment. - filename must be specified before limit mark NG: cat <<EOF > FILE.py OK: cat > FILE.py <<EOF - limit mark must not be quoted NG: cat > FILE.py <<'EOF' OK: cat > FILE.py <<EOF import-checker.py itself is fixed in subsequent patch.

fuzz: allow manifest fuzzer to detect leaks Huzzah! Differential Revision: https://phab.mercurial-scm.org/D4907

fuzzers: init Python in LLVMFuzzerInitialize and intentionally leak it This sidesteps leaks (or "leaks", I'm not sure) in CPython, and lets our fuzzer work. Differential Revision: https://phab.mercurial-scm.org/D4906

revlog: if the module is initialized more than once, don't leak nullentry Caught (annoyingly) by the manifest fuzzer. Differential Revision: https://phab.mercurial-scm.org/D4905

narrow: move remaining narrow-limited dirstate walks to core In most places we now filter at a higher level (the context object), but there are few places that relied on the dirstate walk to be filtered by the narrowspec. The important cases are those used by `hg add` and `hg addremove`. This patch updates them to pass in a matcher instead of relying on the dirstate to do the filtering. The dirstate filtering is also dropped in narrowdirstate.py. Not always filtering in the dirstate should be useful for a future `hg status --include-outside-narrow` option. These places now end up doing an unrestricted dirstate walk after this patch: * debugfileset * perfwalk * sparse (but restricted to sparse config) * largefiles I'll let anyone who cares about these cases adapt them to work with narrow if necessary. Differential Revision: https://phab.mercurial-scm.org/D4901