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templates: make `firstline` filter not keep '\v', '\f' and similar...
templates: make `firstline` filter not keep '\v', '\f' and similar In b288b4bb8448 (hide some functions behind lambdas, so demandload is useful., 2006-02-28), `x.splitlines(1)[0]` was replaced by `x.splitlines(1)[0].rstrip('\r\n')`, i.e. stripping trailing '\r' and '\n'. Combined with the "truthy" `1` passed to `splitlines()` to get it to keep line endings, that results in e.g. trailing '\v' (Line Tabulation) and '\f' (Form Feed) being preserved. I can't see why one would want that, and I doubt that was the intention; I suspect the author just didn't think to instead remove the `1` argument. Perhaps they thought the 1 being passed there - added by themselves in a7e416bf3c1d (improve templating., 2006-02-27) - was to limit the number of splits to 1 (i.e. thinking about it as `maxsplit=1` rather than `keepends=1`). Differential Revision: https://phab.mercurial-scm.org/D12403
Martin von Zweigbergk -
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Requirements

Building the Inno installer requires a Windows machine.

The following system dependencies must be installed:

Building

The packaging.py script automates the process of producing an Inno installer. It manages fetching and configuring the non-system dependencies (such as py2exe, gettext, and various Python packages).

The script requires an activated Visual C++ 2008 command prompt. A shortcut to such a prompt was installed with Microsoft Visual C++ Compiler for Python 2.7. From your Start Menu, look for Microsoft Visual C++ Compiler Package for Python 2.7 then launch either Visual C++ 2008 32-bit Command Prompt or Visual C++ 2008 64-bit Command Prompt.

From the prompt, change to the Mercurial source directory. e.g. cd c:\src\hg.

Next, invoke packaging.py to produce an Inno installer. You will need to supply the path to the Python interpreter to use.:

$ py -3 contrib\packaging\packaging.py \
    inno --python c:\python27\python.exe

Note

The script validates that the Visual C++ environment is active and that the architecture of the specified Python interpreter matches the Visual C++ environment and errors if not.

If everything runs as intended, dependencies will be fetched and configured into the build sub-directory, Mercurial will be built, and an installer placed in the dist sub-directory. The final line of output should print the name of the generated installer.

Additional options may be configured. Run packaging.py inno --help to see a list of program flags.

MinGW

It is theoretically possible to generate an installer that uses MinGW. This isn't well tested and packaging.py and may properly support it. See old versions of this file in version control for potentially useful hints as to how to achieve this.