parser: add short comment how aliases are expanded in phases

parser: reorder alias expansion routine to return early I think it improves readability to move trivial cases first, and unindent blocks.

parser: move functions that process alias expansion to rule-set class They will be commonly used by revset and templater. It isn't easy to understand how _expand() works, so I'll add comments by a follow-up patch. The local variable 'alias' is renamed to 'a' to avoid shadowing the global 'alias' class.

revset: unindent codes in _getalias() function We generally do return early if tree isn't a tuple.

parser: extract helper that creates a dict of aliases This will be common between revset and templater. The local variable 'alias' is renamed to 'a' to avoid shadowing the global 'alias' class.

parser: construct alias object by rule-set class It was odd that the revsetalias did the whole parsing stuff in __init__(). Instead, this patch adds a factory function to the aliasrules class, and makes the alias (= revsetalias) class a plain-old value object.

graphmod: shorten graph Shorten the graph, cutting the all vertical (not oblique) edges rows. Activate with 'graphshorten = true' in [experimental] section. Example graph with deactivated option: $ hg log --graph --template '{rev} {desc|firstline}' --rev 1035:1015 o 1035 Merge with BOS |\ | o 1034 Fix help output, and a few broken tests. | | | o 1033 Merge with MPM. | |\ | | o 1032 Get patchbomb working with tip again. | | | | | o 1031 Rewrite log command. New version is faster and more featureful. | | | | | o 1030 Merge with MPM. | | |\ | | | o 1029 Emacs: implement hg-incoming, hg-outgoing and hg-push. | | | | | | | o 1028 Add commands.debugconfig. | | | | | | | o 1027 Emacs: fix up hg-log and hg-diff to operate more uniformly. | | | | | | | o 1026 Merge with MPM. | | | |\ | | | | o 1025 Merge with MPM. | | | | | | | | | ~ | | | o 1024 Sync buffers prior to doing a diff. | | | | | | | ~ o | | 1023 Minor tweak to the revgen algorithm |/ / o | 1022 Minor hgwebdir tweaks | | o | 1021 Add Makefile to the manifest | | o | 1020 Add default make rule | | o | 1019 Create helper functions for I/O to files in the working directory | | o | 1018 Add some aliases | | o | 1017 Fix up help for binary options |/ o 1016 Teach annotate about binary files | o 1015 Add automatic binary file detection to diff and export | ~ Example graph with activated option: $ hg log --graph --template '{rev} {desc|firstline}' --rev 1035:1015 o 1035 Merge with BOS |\ | o 1034 Fix help output, and a few broken tests. | o 1033 Merge with MPM. | |\ | | o 1032 Get patchbomb working with tip again. | | o 1031 Rewrite log command. New version is faster and more featureful. | | o 1030 Merge with MPM. | | |\ | | | o 1029 Emacs: implement hg-incoming, hg-outgoing and hg-push. | | | o 1028 Add commands.debugconfig. | | | o 1027 Emacs: fix up hg-log and hg-diff to operate more uniformly. | | | o 1026 Merge with MPM. | | | |\ | | | | o 1025 Merge with MPM. | | | | | | | | | ~ | | | o 1024 Sync buffers prior to doing a diff. | | | | | | | ~ o | | 1023 Minor tweak to the revgen algorithm |/ / o | 1022 Minor hgwebdir tweaks o | 1021 Add Makefile to the manifest o | 1020 Add default make rule o | 1019 Create helper functions for I/O to files in the working directory o | 1018 Add some aliases o | 1017 Fix up help for binary options |/ o 1016 Teach annotate about binary files o 1015 Add automatic binary file detection to diff and export | ~