upgrade: use 'improvement' object for action too This simplify multiple pieces of code. For now we restrict this upgrade to the top level function to keep this patch simple.

upgrade: implement equality for 'improvement' object Through the code, we use a mix of 'improvement' object and string. Having a single type would be simpler. For this we need the object to be comparable.

upgrade: simplify some of the initial dispatch for dry run Since we already have the list of deficiencies, we can use it directly.

upgrade: simplify 'determineactions' Since we only takes 'deficiencies', we can simplify the function and clarify its arguments.

upgrade: filter optimizations outside of 'determineactions' This sounds like higher level logic to process arguments. Moving it out of 'determineactions' will allow passing only deficiencies to the function. Then, in a future changeset, we will remove dispatch on "improvement type" within the function. See next changeset for details.

upgrade: directly iterate over optimisations Since we already have the list of optimisations independent from the deficiencies, we can use it directly. (we make a dual assignement in this changeset to simplify the next one)

upgrade: simplify optimisations validation Since we fetch optimizations distinctly from the deficiencies, we can simplify some code.

upgrade: split finding deficiencies from finding optimisations Our ultimate goal is to make it easier to get a diagnostic of the repository format. A first important and step for that is to separate part related to repository format from the optimisation. We start by having two different functions returning the two categories of possible "improvement".

upgrade: update the copyright statement

upgrade: update the header comment

upgrade: import 'localrepo' globally The in-function imports mention a cycle that seems to no longer be relevant. As a result, we just import it globally.

largefiles: set the extension as enabled locally after a share requiring it This has been done for clone since e1dbe0b215ae, so it makes sense here for the same reasons.

windows: add context manager support to mixedfilemodewrapper I stumbled into this in the next patch. The difference between getting a context manager capable object or not from vfs classes was as subtle as adding a '+' to the file mode.

chg: always wait for pager Previously, when runcommand raises, chg aborts with, and does not wait for pager. The call stack is like: hgc_runcommand -> handleresponse -> readchannel -> debugmsg("failed to read channel") -> exit(255) That means, chg returns to the shell, then both the pager and the shell will read from the terminal at the same time, causing problems. This patch fixes that by using "atexit" to register the pager cleanup function so chg will always wait for pager even if runcommand raises.

bundle2: move 'seek' and 'tell' methods off the unpackermixin class These methods are unrelated to unpacking. They are used internally by the 'unbundlepart' class only. So me move them there as private methods. In the same go, we clarify their internal role in the their docstring.