Mercurialでカスタムマージツールを使用できます。 help merge-tools
実行するツールが選択された順序を示します。
1. If a tool has been specified with the --tool option to merge or
resolve, it is used. If it is the name of a tool in the merge-tools
configuration, its configuration is used. Otherwise the specified tool
must be executable by the shell.
2. If the "HGMERGE" environment variable is present, its value is used and
must be executable by the shell.
3. If the filename of the file to be merged matches any of the patterns in
the merge-patterns configuration section, the first usable merge tool
corresponding to a matching pattern is used. Here, binary capabilities
of the merge tool are not considered.
4. If ui.merge is set it will be considered next. If the value is not the
name of a configured tool, the specified value is used and must be
executable by the shell. Otherwise the named tool is used if it is
usable.
5. If any usable merge tools are present in the merge-tools configuration
section, the one with the highest priority is used.
6. If a program named "hgmerge" can be found on the system, it is used -
but it will by default not be used for symlinks and binary files.
7. If the file to be merged is not binary and is not a symlink, then
"internal:merge" is used.
8. The merge of the file fails and must be resolved before commit.
詳細については、をご覧くださいhelp config
。merge-tools
merge-patterns