transaction: support cache file in backupentries We do not want to abort if anything wrong happen while handling a cache file. Cache file have way to be invalidated and if old/bad version stay no misbehavior will happen. Proper value will eventually be computed and the wrong will be righten. This changeset use the transaction reporter (usually writing on stderr) to write details about failed cache handling. This will only apply to write operation using a transaction. The usual update during read only operation will stay a debug message. I was on the way to bring these message back to debug level when I realised it could be a feature. People with write access to the repository are likely to have the power to fix error related to cache (and it is valuable to fix them). So let the things as is for now.

transaction: use the location value when doing backup We finally use the 'location' value coupled with the 'vfsmap' to restore backup for the right file.

transaction: pass a vfs map to the transaction The goal is to allow access to file outside ofthe store directory from the transaction. The obvious target are the `bookmarks` file. But we can envision usage for cache too. We keep passing a main opener explicitly because a lot of code rely on this default opener. The main opener (operating on store) is using an empty key ''.

transaction: change the on disk format for backupentries We need to store new data to improve the current transaction logic: - location: We want to generate and backup file outside of the 'store' (eg: bookmarks, or various cache files). This requires knowing and preserving where each file is located. The value of this new field is a string. It will be used as a key for a vfs mapping. - cache: We would like to handle cache file in the transaction code. This Will help to have cache consistent with the repository state and avoid performance issue on big repository like Mozilla. However, failure to handle cache file should not result in a transaction failure. We add a new field that carry this information. The value is boolean, A True value mean any error while handling this file can be ignored. Those two mechanisms are not implemented yet, but they are now persisted in the on disk file. Support for new mechanisms is coming in later changeset. We update the file format now and will introduce the new features in later changeset. The format version is set to 0 until we actually support the new feature. This will prevent misunderstanding between incomplete and final client. Support for reading both version 1 and (future) version 2 could be achieved (using default value when reading version 1) but has not been seen as necessary for now.

silenttestrunner: add environment variable to make tests noisy again As I've been working on complicated extension code it's been handy to be able to get standard unittest verbose output so I can find crashers more efficiently.

largefiles: update comments to refer to the right overridden method This cleans up leftovers from b228ad1f79d7 (largefiles: override calculateupdates instead of manifestmerge, 2014-03-02).

revlog: cache chain info after calculating it for a rev (issue4452) This dumb cache works surprisingly well: on a repository with typical delta chains ~50k in length, unbundling a linear series of 5000 revisions (changelogs and manifests only) went from 60 seconds to 3.

manifest: add matches() method Move the code in context._manifestmatches() into a new manifest.matches(). It's a natural place for the code to live and it allows other callers to easily use it. It should also make it easier to optimize the new method in alternative implementations of the manifest (same reasoning as with manifest.diff()).

context.status: pass status tuple into _buildstatus By passing a status tuple (instead of the current list), we can access the status fields by name and make it a little more readable.

context.status: avoid de- and reconstructing status tuple We can just modify the status tuple we got from dirstate.status() instead of deconstructing it and constructing a new instance, thereby simplifying the code a little.

context.status: make _dirstatestatus() return an status tuple Letting _dirstatestatus() return an scmutil.status instance also means that _buildstatus() will always return such an instance, so we can remove the conversion from the call sites.

context.status: wipe deleted/unknown/ignored fields when reversed It makes no sense to request reverse status (i.e. changes from the working copy to its parent) and then look at the deleted, unknown or ignored fields. If you do, you would get the result from the forward status (changes from parent to the working copy). Instead of giving a nonsensical answer to a nonsensical question, it seems a little saner to return empty lists. It might be best if we could prevent the caller accessing these lists, but it's doubtful it's worth the trouble.

patch.trydiff: add support for noprefix

mdiff.unidiff: add support for noprefix

diff: add a --noprefix option See previous patch descriptions for the motivation. The tests reflect the current state of the world -- as we add support we'll see changes in the test output.

patch.diffopts: add support for noprefix In an upcoming patch we'll enable support as an option to 'hg diff' as well. The tests reflect the current state of the world -- as we add support we'll see changes in the test output.

patch.diffopts: allow a setting to be forced in plain mode Upcoming patches will add an option that will almost certainly break diff output parsers when enabled. Add support for forcing an option to something in plain mode, as a fallback. Options passed in via the CLI are not affected, though -- it is assumed that any script passing the option in explicitly knows what it is doing.

patch.diffopts: break get function into if statements We're going to add another condition here, and with the current structure that becomes just too confusing.

mdiff.diffopts: add a new noprefix option By popular demand, we introduce an option to disable the 'a/' and 'b/' prefixes in diff output. This makes copying and pasting filenames from diff output easier. This option will be implemented and documented in upcoming patches. To ensure that existing scripts that parse output don't break, we will ensure that this prefix is disabled in plain mode. A straight 'hg export | hg import' without HGPLAIN=1 will still be broken though, but there's little that can be done about that.

mdiff.diffopts: add doc comment for nobinary

changelog: register changelog.i.a as a temporary file The file is registered to make sure the transaction is cleaned up in all cases.

transaction: allow registering a temporary transaction file During the transaction, files may be created to store or expose data involved in the transaction (eg: changelog index data are written in a 'changelog.i.a' for hooks). But we do not have an official way to record such file creation and make sure they are cleaned up. The lack of clean-up is currently okay because there is a single file involved and a single producer/consumer. However, as we want to expose more data (bookmarks, phases, obsmarker) we need something more solid. The 'backupentries' mechanism could handle that. Temporary files can be encoded as a backup of nothing '('', <temporarypath>)'. We "need" to attach it to the same mechanism as we use to be able to use temporary transaction files outside of .'store/' and 'backupentries' is expected to gain such feature. This changeset makes it clear that we should rename 'backupentries' to something more generic.

transaction: always generate file on close The conditionnal was buggy and file were only generated if "onclose" was defined. By luck, "onclose" was always defined.

remove: move most of the implementation into cmdutils.remove() This will allow access to the reusable parts from subrepos, similar to add(), forget(), etc.

revlog: increase I/O bound to 4x the amount of data consumed This doesn't affect normal clones since they'd be bound by the CPU bound below anyway -- it does, however, improve generaldelta clones significantly. This also results in better deltaing for generaldelta clones -- in generaldelta clones, we calculate deltas with respect to the closest base if it has a higher revision number than either parent. If the base is on a significantly different branch, this can result in pointlessly massive deltas. This reduces the number of bases and hence the number of bad deltas. Empirically, for a highly branchy repository, this resulted in an improvement of around 15% to manifest size.

revlog: bound based on the length of the compressed deltas This is only relevant for generaldelta clones.

revlog: compute length of compressed deltas along with chain length In upcoming patches to the revlog, we're going to split up the notions of bounding I/O and bounding CPU.

revlog: store fulltext when compressed delta is bigger than it This is a very silly case and not particularly likely to happen in the wild, but it turns out we can hit it in a couple of places. As we tune the storage parameters we're likely to hit more such cases. The affected test cases all have smaller revlogs now.

revlog: make a predicate clearer with parens

transaction: extract backupentry registration in a dedicated function We are about to use the 'backupentry' mechanism to allow cleaning up transaction-related temporary files (such as 'changelog.i.a'). We start by extracting the entry registration into its own method for easy reuse. At that point, I would like to rename the backup-file related variable to something generic but I'm a bit short of ideas.

transaction: pass the transaction to 'postclose' callback This mirrors the API for 'pending' and 'finalize' callbacks. I do not have immediate usage planned for it, but I'm sure some callback will be happy to access transaction related data.

transaction: pass the transaction to 'finalize' callback The callback will likely need to perform some operation related to the transaction (eg: registering file update). So we better pass the current transaction as the callback argument. Otherwise callback that needs it has to rely on horrible weak reference trick. This allow already allow us to slay a wild weak reference usage.

transaction: pass the transaction to 'pending' callback The callback will likely need to perform some operation related to the transaction (eg: backing files up). So we better pass the current transaction as the callback argument. Otherwise callback that needs it has to rely on horrible weak reference trick. The first foreseen user of this is changelog._writepending. We would like it to register the temporary file it create for cleanup purpose.

transaction: gather backupjournal logic together in the __init__ The initialisation of file-backup related variable were a bit scattered, we gather them together.

transaction: handle missing file in backupentries (instead of using entries) The case where a backup of a missing file was requested was previously handled by the 'entries' list. As the 'backupentries' is about to gain ability to backup files outside of '.hg/store', we want it to be able to handle the missing file too. Reminder: using 'addbackup' on a missing file means that such file needs to be deleted if we rollback the transaction.

test-hup: use ls instead of echo Having one file entry per line makes it easier to analyse diffs.

largefiles: move "copyalltostore" invocation into "markcommitted" Before this patch, while "hg convert", largefiles avoids copying largefiles in the working directory into the store area by combination of setting "repo._isconverting" in "mercurialsink{before|after}" and checking it in "copytostoreabsolute". This avoiding is needed while "hg convert", because converting doesn't update largefiles in the working directory. But this implementation is not efficient, because: - invocation in "markcommitted" can easily ensure updating largefiles in the working directory "markcommitted" is invoked only when new revision is committed via "commit" of "localrepository" (= with files in the working directory). On the other hand, "commitctx" may be invoked directly for in-memory committing. - committing without updating the working directory (e.g. "import --bypass") also needs this kind of avoiding For efficiency of this kind of avoiding, this patch does: - move "copyalltostore" invocation into "markcommitted" - remove meaningless procedures below: - hooking "mercurialsink{before|after}" to (un)set "repo._isconverting" - checking "repo._isconverting" in "copytostoreabsolute" This patch invokes "copyalltostore" also in "_commitcontext", because "_commitcontext" expects that largefiles in the working directory are copied into store area after "commitctx". In this case, the working directory is used as a kind of temporary area to write largefiles out, even though converted revisions are committed via "commitctx" (without updating normal files).

largefiles: avoid printing messages while transplanting by "_lfstatuswriters" Putting "lambda *msg, **opts: None" (= avoid printing messages always) into "_lfstatuswriters" while transplanting makes explicit passing "printmessage = False" for "updatelfiles()" useless. This patch also removes setting/unsetting "repo._istransplanting" in "overridetransplant", because there is no code path referring it.

largefiles: update standins only at the 1st commit of "transplant --continue" Before this patch, "hg transplant --continue" may record incorrect standins, because largefiles extension always avoid updating standins while transplanting, even though largefiles in the working directory may be modified manually at the 1st commit of "hg transplant --continue". But, on the other hand, updating standins should be avoided at subsequent commits for efficiency reason. To update standins only at the 1st commit of "hg transplant --continue", this patch uses "automatedcommithook", which updates standins by "lfutil.updatestandinsbymatch()" only at the 1st commit of resuming. Even after this patch, "repo._istransplanting = True" is still needed to avoid some status report while updating largefiles in "lfcommands.updatelfiles()". This is reason why this patch omits not "repo._istransplanting = True" in "overriderebase" but examination of "getattr(repo, "_istransplanting", False)" in "updatestandinsbymatch".

largefiles: avoid redundant "updatelfiles" invocation in "overridetransplant" At "hg transplant --merge REV", largefiles newly coming from the 2nd parent (= REV) are marked as "a"(dded) by "patch.patch()", and have to be marked as "n"(ormal) after commit. But until changeset 3100d1cbce32, such largefiles were still marked as "a" unexpectedly even after commit, because no additional entry is added to filelog of such largefiles and they aren't listed in "repo[newnode].files()" in this case: "newnode" is one of newly committed changeset (= result of "repo.commit()"). "updatelfiles" invocation in "overridetransplant" shadows this problem by forcibly synchronizing lfdirstate to dirstate. Now, "updatelfiles" invocation in "overridetransplant" is redundant, because changeset 3100d1cbce32 made "markcommitted" use "ctx.files()" to get targets of "synclfdirstate" instead of "repo[newnode].files()".

merge with stable

util.system: remove unused handling of onerr=ui In our code, onerr is None or util.Abort. It smells bad to overload ui and exception class.

util.system: use ui.system() in place of optional ui.fout parameter

ui: introduce util.system() wrapper to make sure ui.fout is used This change is intended to avoid future problem of data corruption under command server. out=ui.fout is mandatory as long as command server uses stdout as IPC channel.

hook: remove redundant code to redirect http hook output to client stream out=ui and out=ui.fout should be the same here. ui.fout was introduced at afccc64eea73, which was not available when out=ui was added at c37f35d7f2f5.

hgk: forward command output to ui.fout consistently Nobody would want to run hgk in command server, but it should work in principle. This fixes possible data corruption of command-server channel.

merge with stable

Added signature for changeset 643c58303fb0

Added tag 3.2.1 for changeset 643c58303fb0

run-tests: use a try/except ladder instead of looking for a specific version This ensures we get json instead of simplejson in as many places as possible.

hghave: use a less brittle have-json check

sortdict: add insert method Future patches will allow extensions to choose which order a namespace should output in the log, so we add a way for sortdict to insert to a specific location.

sortdict: add iteritems method Future patches will start using sortdict for log operations where order is important. Adding iteritems removes the headache of having to remember to use items() if the object is a sortdict.

addremove: add back forgotten files (BC) After running "hg forget README && hg addremove", README will still be reported as removed, while "hg forget README && hg add README" adds it back so it gets reported as clean. It seems like they should behave the same. Furthermore, it seems like no files should remain untracked after 'hg addremove && hg commit' (or 'hg commit -A'). For these reasons, change the behavior of addremove so it does add forgotten files back. The problem is with scmutil._interestingfiles(), which reports the file as removed, so scmutil.addremove() does not add it. Fix by teaching _interestingfiles() to report forgotten files separately from removed files and make addremove() add forgotten files back. However, do not treat forgotten files as sources for rename detection. Note that since removed and forgotten files are treated the same before this change, forgotten files were considered sources for rename detection. Also update the other caller, marktouched(), in the same way as addremove().

add: add back forgotten files even when not matching exactly (BC) I accidentally did 'hg forget .' and tried to undo the operation with 'hg add .'. I expected the files to be reported as either modified or clean, but they were still reported as removed. It turns out that forgotten files are only added back if they are listed explicitly, as shown by the following two invocations. This makes it hard to recover from the mistake of forgetting a lot of files. $ hg forget README && hg add README && hg status -A README C README $ hg forget README && hg add . && hg status -A README R README The problem lies in cmdutil.add(). That method checks that the file isn't already tracked before adding it, but it does so by checking the dirstate, which does have an entry for forgotten files (state 'r'). We should instead be checking whether the file exists in the workingctx. The workingctx is also what we later call add() on, and that method takes care of transforming the add() into a normallookup() on the dirstate. Since we're changing repo.dirstate into wctx, let's also change repo.walk into wctx.walk for consistency (repo.walk calls wctx.walk, so we're simply inlining the call).

context.status: explain "caching reasons" more fully Where we "load earliest manifest first for caching reasons", elaborate on what "caching reasons" refers to. Text provided by Matt in http://thread.gmane.org/gmane.comp.version-control.mercurial.devel/73235/focus=73578.

localrepo: rename revlog.maxchainlen to format.maxchainlen This is more consistent with other option names, as spotted by Pierre-Yves. Thanks!

revlog: add config variable for limiting delta-chain length The current heuristic for deciding between storing delta and full texts is based on ratio of (sizeofdeltas)/(sizeoffulltext). In some cases (for example a manifest for ahuge repo) this approach can result in extremely long delta chains (~30,000) which are very slow to read. (In the case of a manifest ~500ms are added to every hg command because of that). This commit introduces "revlog.maxchainlength" configuration variable that will limit delta chain length.

debugrevlog: fix computing chain length in debugrevlog -d The chain length was computed correctly only when generaldelta feature was enabled. Now it's fixed. When generaldelta is disabled the base revision in revlog index is not the revision we have delta against - it's always previous revision. Instead of incorrect chainbaseandlen in command.py we are now using two single-responsibility functions in revlog.py: - chainbase(rev) - chainlen(rev) Only chainlen(rev) was missing so it was written to mimic the way the chain of deltas is actually found during file reconstruction.

transaction: factorise append-only file registration The addition is done in two different places but differs slightly. We factorise this addition to ensure it is consistent in all places.

transaction: document `tr.add`

transaction: drop backupentries logic from startgroup and endgroup The `startgroup` and `endgroup` methods are used in a very specific context to wrap a very specific operation (revlog truncation). It does not make sense to perform any other operations during such a "group" (eg:file backup). There is currently no user of backupfile during a "group" so we drop the group-specific code and restrict authorized operations during "group".

transaction: document startgroup and endgroup These enigmatic methods are only used in repair. We document them to clarify there purpose and user.

transaction: mark backup-related attributes private As the transaction is gaining more functions and attributes, it is important to clarify what is part of the public API.