icasefs: avoid normcase()-ing in util.fspath() for efficiency 'dirstate._normalize()', the only caller of 'util.fspath()', has already normcase()-ed path before invocation of it. normcase()-ed root can be cached on dirstate side, too. so, this patch changes 'util.fspath()' API specification to avoid normcase()-ing in it.

icasefs: use util.normcase() instead of lower() or os.path.normcase in fspath this also avoids lower()-ing on each path components by reuse the path normcase()-ed at beginning of function.

dirstate: prevent useless util.fspath() invocation for '.' at first of dirstate.walk() on case insensitive filesystem, normalization of '.' causes util.fspath() invocation, but '.' is not cached in it. this invocation is not only useless, but also harmful: initial "hg tag" causes creation of ".hgtags" file after dirstate.walk(), and looking up ".hgtags" in cache will fail, because directory contents of root is already cached at util.fspath() invocation for '.'.

icasefs: consider as case sensitive if there is no counterevidence, for safety for safety, this patch prevents case-less name from misleading into case insensitivity, even though such names should not be used.

pathauditor: switch normcase logic according to case sensitivity of filesystem this patch applies 'util.normcase()' to audit path only on case insensitive filesystem.

pathauditor: preserve case in abort messages this patch uses both plain and normcase()-ed pathes to preserve letter case of path in abort messages.

pathauditor: use normcase()-ed path for audit result cache in current pathauditor implementation, un-normcase()-ed path is stored into and compared with audit result cache. this is not efficiency on case insensitive filesystem.

largefiles: handle merges between normal files and largefiles (issue3084) The largefiles extension prevents users from adding a normal file named 'foo' if there is already a largefile with the same name. However, there was a loop-hole: when merging, it was possible to bring in a normal file named 'foo' while also having a '.hglf/foo' file. This patch fixes this by extending the manifest merge to deal with these kinds of conflicts. If there is a normal file 'foo' in the working copy, and the other parent brings in a '.hglf/foo' file, then the user will be prompted to keep the normal file or the largefile. Likewise for the symmetric case where a normal file is brought in via the second parent. The prompt looks like this: $ hg merge foo has been turned into a largefile use (l)argefile or keep as (n)ormal file? After the merge, either the '.hglf/foo' file or the 'foo' file will have been deleted. This would cause status to return output like: $ hg status M foo R foo To fix this, the lfiles_repo.status method is changed so that a removed normal file isn't shown if there is largefile with the same name, and vice versa for largefiles.

progress: check for ui.quiet and ui.debugflag before we write ui.quiet and ui.debugflag are not initialized during uisetup and reposetup. progressui is always initialized, therefore we have to check during write() if ui.quiet is set or not.

changelog: handle decoding of NULs in extra more carefully (issue3156) Escaped NULs adjacent to [0-7] could be decoded as octal. This hits about 0.24% of changesets with transplant, which stores binary nodes.