phabricator: record all local commits used to create a Differential revision Arcanist records all of the commits that it squashes into a single review, and that info will be helpful when adding similar functionality. This info is used when submitting an updated review, so that the extension can recalculate the old diff and see if a new one is necessary, or if it is just a property update. It also shows on the `commits` tab in the `Revision Contents` section. When submitting in the usual 1:1 commit to review mode, the wire protocol is unchanged. The content of `hg:meta` is a bit odd, but such is the problem when folding several commits. The choice for the parent node is obvious, but the `node` value uses the tip commit because that seems more natural, and is used elsewhere to look up the previous diff when updating. The rest of the attributes follow from there. Differential Revision: https://phab.mercurial-scm.org/D8308

tests: use `f --hexdump` to print file content The inline print.py in this test wasn't fully compatible with Python 3 because it was reading from sys.stdin, which already normalized line endings since it operates in the realm of str on Python 3. To do this correctly, we'd need to read from sys.stdin.buffer on Python 3. This would entail conditional code. I felt this was too much effort. So I just replaced the custom script with `f`, which already knows how to do the right thing. test-mactext.t now passes on Python 3 on Windows. Differential Revision: https://phab.mercurial-scm.org/D8336

url: pass str to pathname2url This is needed to appease Python 3. This fixes test-extdata.t and test-url-download.t on Python 3 on Windows. Differential Revision: https://phab.mercurial-scm.org/D8335

tests: pass str to matchoutput() It accepts a str, not bytes. This fixes a failure in test-hghave.t on Windows. Why it wasn't failing on Linux, I don't know. I suspect the Windows process code in Python doesn't accept bytes and the POSIX code does? Differential Revision: https://phab.mercurial-scm.org/D8334

hgcli: customize for Mercurial Now that we have a shiny new PyOxidizer-based hgcli project, let's customize it for Mercurial! This commit replaces the auto-generated pyoxidizer.bzl with one that installs Mercurial from the local source repository. A README.md with build instructions has been added. The Cargo.toml file has been updated to reflect the proper license and reference the added README.md. In my Linux environment, running the test suite yields 27 failures. It's worth noting the run time of the test harness on Linux on my Ryzen 3950X: before: 378s wall; 9982s user; 1195s sys after: 353s wall; 8996s user; 958s sys % orig: 93.4 wall; 90.1 user; 80.2 sys While I haven't measured explicitly, I suspect the performance win is due to in-memory resource loading (which is known to be faster than Python's filesystem importer). Differential Revision: https://phab.mercurial-scm.org/D8351

hgcli: add stub PyOxidizer project Using commit c772a1379c3026314eda1c8ea244b86c0658951d of PyOxidizer, I ran `pyoxidizer init-rust-project hgcli` to create a stub Rust project. The only modifications I made from what that command produced are: * Update location of pyembed crate to PyOxidizer's Git repository. * Removed some trailing whitespace from pyoxidizer.bzl * Added auto-generated Cargo.lock file Subsequent commits will modify the stub project to Mercurial's needs. Differential Revision: https://phab.mercurial-scm.org/D8350

hgcli: remove legacy project This code is a logical precursor to PyOxidizer. It is now defunct. Differential Revision: https://phab.mercurial-scm.org/D8349

nodemap: automatically "vacuum" the persistent nodemap when too sparse We arbitrarily pick "10%" as the threshold. Differential Revision: https://phab.mercurial-scm.org/D8193

nodemap: display percentage of unused in `hg debugnodemap` This is useful to assess the density of the cache. Differential Revision: https://phab.mercurial-scm.org/D8192

nodemap: make sure on disk change get rolled back with the transaction In case of errors, we need to rollback the change made to the persistent nodemap. Differential Revision: https://phab.mercurial-scm.org/D8191