Mercurial > hg
view relnotes/5.4 @ 50336:cf4d2f31660d stable
chg: populate CHGHG if not set
Normally, chg determines which `hg` executable to use by first consulting the
`$CHGHG` and `$HG` environment variables, and if neither are present defaults
to the `hg` found in the user's `$PATH`. If built with the `HGPATHREL` compiler
flag, chg will instead assume that there exists an `hg` executable in the same
directory as the `chg` binary and attempt to use that.
This can cause problems in situations where there are multiple actively-used
Mercurial installations on the same system. When a `chg` client connects to a
running command server, the server process performs some basic validation to
determine whether a new command server needs to be spawned. These checks include
things like checking certain "sensitive" environment variables and config
sections, as well as checking whether the mtime of the extensions, hg's
`__version__.py` module, and the Python interpreter have changed.
Crucially, the command server doesn't explicitly check whether the executable it
is running from matches the executable that the `chg` client would have
otherwise invoked had there been no existing command server process. Without
`HGPATHREL`, this still gets implicitly checked during the validation step,
because the only way to specify an alternate hg executable (apart from `$PATH`)
is via the `$CHGHG` and `$HG` environment variables, both of which are checked.
With `HGPATHREL`, however, the command server has no way of knowing which hg
executable the client would have run. This means that a client located at
`/version_B/bin/chg` will happily connect to a command server running
`/version_A/bin/hg` instead of `/version_B/bin/hg` as expected. A simple
solution is to have the client set `$CHGHG` itself, which then allows the
command server's environment validation to work as intended.
I have tested this manually using two locally built hg installations and it
seems to work with no ill effects. That said, I'm not sure how to write an
automated test for this since the `chg` available to the tests isn't even built
with the `HGPATHREL` compiler flag to begin with.
author | Arun Kulshreshtha <akulshreshtha@janestreet.com> |
---|---|
date | Mon, 27 Mar 2023 17:30:14 -0400 |
parents | f445a4f7e8a7 |
children |
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== New Features == * `hg purge`/`hg clean` can now delete ignored files instead of untracked files, with the new -i flag. * `hg pull` now has a `--confirm` flag to prompt before applying changes. Config option `pull.confirm` is also added for that. * `hg log` now defaults to using an '%' symbol for commits involved in unresolved merge conflicts. That includes unresolved conflicts caused by e.g. `hg update --merge` and `hg graft`. '@' still takes precedence, so what used to be marked '@' still is. * New `conflictlocal()` and `conflictother()` revsets return the commits that are being merged, when there are conflicts. Also works for conflicts caused by e.g. `hg graft`. * `hg copy --forget` can be used to unmark a file as copied. * The `format.revlog-compression` configuration entry now accept a list. The first available option will be used. for example setting:: [format] revlog-compression=zstd, zlib Will use `zstd` compression for new repositories is available, and will simply fall back to `zlib` if not. * `hg debugmergestate` output is now templated, which may be useful e.g. for IDEs that want to help the user resolve merge conflicts. == New Experimental Features == * `hg copy` now supports a `--at-rev` argument to mark files as copied in the specified commit. It only works with `--after` for now (i.e., it's only useful for marking files copied using non-hg `cp` as copied). * Use `hg copy --forget --at-rev REV` to unmark already committed copies. == Bug Fixes == * Fix server exception when concurrent pushes delete the same bookmark * Prevent pushes of divergent bookmarks (foo@remote) * The push error "remote repository changed while pushing - please try again" now only happens when a concurrent push changed related heads (instead of when a concurrent pushed any revision). == Backwards Compatibility Changes == * When `hg rebase` pauses for merge conflict resolution, the working copy will no longer have the rebased node as a second parent. You can use the new `conflictparents()` revset for finding the other parent during a conflict. * `hg rebase` now accepts repeated `--source` and `--base` arguments. For example, `hg rebase --source 'A + B'` is equivalent to `hg rebase --source A --source B`. This is a backwards-incompatible change because it will break overriding an alias `myrebase = rebase --source A` by `hg myrebase --source B` (it will now rebase `(A + B)::` instead of `B::`). * `hg recover` does not verify the validity of the whole repository anymore. You can pass `--verify` or call `hg verify` if necessary. * `hg debugmergestate` output format changed. Let us know if that is causing you problems and we'll roll it back. * Resolved merge conflicts are now cleared by `hg commit` even if the working copy has no changes. == Internal API Changes == * The deprecated `ui.progress()` has now been deleted. Please use `ui.makeprogress()` instead. * `hg.merge()` now takes a `ctx` instead of the previous `repo` and `node` arguments. * `hg.merge()` has lost its `abort` argument. Please call `hg.abortmerge()` directly instead. * `hg.merge()` has lost its `mergeforce` argument. It should have only ever been called with the same value as the `force` argument. * The `*others` argument of `cmdutil.check_incompatible_arguments()` changed from being varargs argument to being a single collection.