Merged files are considered modified at commit time even if only 1 parent
differs. In this case we must use the change context of this parent for
expansion.
The issue went unnoticed for long because it is only apparent until the next
update to the merge revision - except in test-keyword where it was always
staring us in the face.
Instead of calling repo[None].status(), use the more common form that
uses the parent of the working copy as the base:
repo['.'].status(). Note that the former defaults to comparing to
revision '.', while the latter defaults to revision None, so the
contexts being compared are the same.
It might seem like this would result in a reverse diff, but it turns
out that workingctx.status() incorrectly reverses the result. That bug
will be fixed in a later commit.
Before this patch, 'hg fetch' may cause unexpected conflict, if 'hg
fetch'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg fetch' for internal
merge by adding 'fetch' to 'restricted' command list like 'merge'.
This patch uses 'hg import' to safely create the new head to be merged
at succeeding 'hg fetch', because:
- branch of revision #10 is different from one of #11 in 'Test'
repository, so just 'hg fetch -r 11' doesn't cause merging between
them
this means the new head should be created manually.
- 'hg import' is easier and safer than 'cat <<EOF' and 'hg commit'
to replay same changes including special characters like '$'
safeness of 'hg import' with keyword extension is already examined
in 'test-keyword.t'.
Before this patch, 'hg histedit' may cause unexpected conflict, if 'hg
histedit'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg histedit' for
internal merge by adding 'histedit' to 'restricted' command list like
'merge'.
Test in this patch just swaps order of revision #13 and #14: this is
enough to cause internal merge.
Before this patch, 'hg backout' may cause unexpected conflict, if 'hg
backout'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg backout' for
internal merge by adding 'backout' to 'restricted' command list like
'merge'.
Before this patch, 'hg graft' may cause unexpected conflict, if 'hg
graft'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg graft' for internal
merge by adding 'graft' to 'restricted' command list like 'merge'.
Before this patch, 'hg rebase' may cause unexpected conflict, if 'hg
rebase'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg rebase' for internal
merge by adding 'rebase' to 'restricted' command list like 'merge'.
This patch specifies '--keep' to 'hg rebase', because revision #10 is
useful also for tests in succeeding patches.
Before this patch, 'hg unshelve' may cause unexpected conflict, if 'hg
unshelve'-ed changes are located near lines in which keywords are
embedded, because keywords are substituted with other strings in the
working directory.
This patch suppresses keyword expansion while 'hg unshelve' for
internal merge by adding 'unshelve' to 'restricted' command list like
'merge'.
Some extensions set configuration settings that showed up in 'hg showconfig
--debug' with 'none' as source. That was confusing.
Instead, they will now tell which extension they come from.
This change tries to be consistent and specify a source everywhere - also where
it perhaps is less relevant.
A repo should not get the configuration from an other repo, so create it with
the global configuration in repo.baseui.
This is done too when recreating a repo. The repo configuration is reread
anyway. And now deleted repo configuration does not persist.
Maintain a whitelist of commands to infer the repo for instead. The whitelist
contains those commands that take file(s) in the working dir as arguments.
You can get into trouble if you commit, update back to an older
changeset, and then rollback. The update removes your valuable changes
from the working dir, then rollback removes them history. Oops: you've
just irretrievably lost data running nothing but core Mercurial
commands. (More subtly: rollback from a shared clone that was already
at an older changeset -- no update required, just rollback from the
wrong directory.)
The fix assumes that only "commit" transactions have irreplaceable
data, and allows rolling back non-commit transactions as always. But
when rolling back a commit, check that the working dir is checked out
to tip, i.e. the changeset we're about to destroy. If not, abort. You
can get back the old (dangerous) behaviour with --force.
The most appropriate context is not always clearly defined. The obvious cases:
For working directory commands, we use None
For commands (eg annotate) with single revs, we use that revision
The less obvious cases:
For commands (eg status, diff) with a pair of revs, we use the second revision
For commands that take a range (like log), we use None
- Add patchmeta.copy() and emit copies from iterhunks. Modifying patchmeta
instances in applydiff() makes things simpler.
- Rename selectfile() into makepatchmeta(). It is responsible for creating
patchmeta for regular patches.
- Pass patchmeta objects to patchfile() directly
patchmeta instances were associated with git patches, for regular patches we
had to pass additional variables to tell the patch intent to patchfile().
Instead, we generate patchmeta for regular patches and pass them. This will
also help with patch filtering by matcher objects.
git patches may require copies to be handled out-of-order. For instance, take
the following sequence:
* modify a
* copy a into b
Here, we have to generate b from a before its modification. To do so,
applydiff() was scanning for copy metadata and performing the copies before
processing the other changes in-order. While smart and efficient, this approach
complicates things by handling file copies and file creations at different
places and times. While a new file must not exist before being patched a copied
file already exists before applying the first hunk.
Instead of copying the files at their final destination before patching, we
store them in a temporary file location and retrieve them when patching. The
filestore always stores file content in real files but nothing prevents adding
a cache layer. The filestore class was kept separate from fsbackend for at
least two reasons:
- This class is likely to be reused as a temporary result store for a future
repository patching call (entries just have to be extended to contain copy
sources).
- Delegating this role to backends might be more efficient in a repository
backend case: the source files are already available in the repository itself
and do not need to be copied again. It also means that third-parties backend
would have to implement two other methods. If we ever decide to merge the
filestore feature into backend, a minimalistic approach would be to compose
with filestore directly. Keep in mind this copy overhead only applies for
copy/rename sources, and may even be reduced to copy sources which have to
handled ahead of time.
The patcher has to know if a file is being created or removed to check if the
target already exists, or to actually unlink the file when a hunk emptying it
is applied. This was done by embedding the creation/removal information in the
first (and only) hunk attached to the file.
There are two problems with this approach:
- creation/removal is really a property of the file being patched and not its
hunk.
- for regular patches, file creation cannot be deduced at parsing time: there
are case where the *stripped* file paths must be compared. Modifying hunks
after their creation is clumsy and prevent further refactorings related to
copies handling.
Instead, we delegate this job to selectfile() which has all the relevant
information, and remove the hunk createfile() and rmfile() methods.
Most filesystem calls are already isolated in patchfile but this is not enough:
renames are performed before patchfile is available and some chmod calls are
even done outside of the applydiff call. Once all these calls are extracted
into a backend class, we can provide cleaner APIs to write to a working
directory context directly into the repository.
