transaction: add a validation stage The 'transaction' object can now be fed a 'validator' function. This function will be run right before the transaction is closed to validate its content. The target usage is hooks. The validation function is expected to raise an exception when it wants to abort the transaction. This only introduce the idea with a default no-op validator. Actual usage is in the next changeset.

hook: add a generic hook after transaction has been closed We are adding generic hooking for all transactions. We may have useful information about what happened during the transaction, user of the transaction should have filled the 'hookargs' dictionnary of the transaction. This hook is simple because it has no power to rollback the transaction.

hook: have a generic hook for transaction opening We are adding generic hooking for all transactions. We do not really have any useful information to include when opening the transaction but this is a useful time to allow a hook anyway. We better let people abort transaction before they happen than after multiple seconds/minutes of processing.

templater: allow piping generator-type function output to filters Template functions use "yield"s assuming that the result will be combined into a string, which means both "f -> str" and "f -> generator" should behave in the same way. Before this patch, piping generator function resulted in a cryptic error. We had to insert "|stringify" in this case. $ hg log --template '{if(author, author)|user}\n' abort: template filter 'userfilter' is not compatible with keyword '[(<function runsymbol at 0x7f5af2e8d8c0>, 'author'), (<function runsymbol at 0x7f5af2e8d8c0>, 'author')]'

record: add new tests for commit interactive (same tests as record)

record: add interactive option to the commit command

manifest: don't let find() look inside manifestdict The find() method is currently implemented by looking inside the _lm field of the manifest dict. Future manifests types (tree manifests) may not have such a field, so add a method for getting to the data instead.

largefiles: replace manifestdict.__contains__, don't extend class We're soon going to add an alternative manifest class (treemanifest). Rather than extending both those classes by largesfiles versions, let's replace the method on the manifest instances.

files: split reusable implementation into cmdutil for subrepo support

files: use ctx object to access dirstate This allows the cmdutil method to not need to be passed the repo as well as the ctx.