dirstate: add dirstatetuple to create dirstate values Upcoming patches will switch away from using Python tuples for dirstate values in compiled builds. Make that easier by introducing a variable called dirstatetuple, currently set to tuple. In upcoming patches, this will be set to an object from the parsers module.

parsers: remove no longer used dirstate_unset

pack_dirstate: in C version, for invalidation set dict to what we write to disk For files written out in the last second, Mercurial used to invalidate all the stat data (state, size, mode, mtime) while persisting to disk. This included invalidating the data in the dirstate dict as well. In commit 187bf2dde7c1, this was found to be unnecessary, and Mercurial switched to invalidating only the mtime. However, in the C version of pack_dirstate the value set in the dict was still the fully invalidated one. Switch to invalidating just the mtime in the dict as well.

record: update comment to match code Commit 205599e31870 changed how newfiles get passed to commitfunc, but did not change the corresponding comment that explains this. This commit also updates this comment.

hg: update newly added listdir function of vfs in clone This change invokes os.listdir() via newly added vfs function in clone.

hg: use vfs functions in clone This change applies vfs functions in clone. destvfs.exists will invoke os.path.lexists via lexists of vfs to check for broken symbolic links.

hg: update util.writefile method to use write with vfs in share This patch replaces util.writefile() to use destvfs.write().