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memory-usage: fix `hg log --follow --rev R F` space complexity...
memory-usage: fix `hg log --follow --rev R F` space complexity When running `hg log --follow --rev REVS FILES`, the log code will walk the history of all FILES starting from the file revisions that exists in each REVS. Before doing so, it looks if the files actually exists in the target revisions. To do so, it opens the manifest of each revision in REVS to look up if we find the associated items in FILES. Before this changeset this was done in a way that created a changectx for each target revision, keeping them in memory while we look into each file. If the set of REVS is large, this means keeping the manifest for each entry in REVS in memory. That can be large… if REV is in the form `::X`, this can quickly become huge and saturate the memory. We have seen usage allocating 2GB per second until memory runs out. So this changeset invert the two loop so that only one revision is kept in memory during the operation. This solve the memory explosion issue.
Matt Harbison - - Load All Authors

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Requirements

Building the Inno installer requires a Windows machine.

The following system dependencies must be installed:

  • Inno Setup (http://jrsoftware.org/isdl.php) version 5.4 or newer. Be sure to install the optional Inno Setup Preprocessor feature, which is required.
  • Python 3.6+ (to run the packaging.py script)

Building

The packaging.py script automates the process of producing an Inno installer. It manages fetching and configuring non-system dependencies (such as gettext, and various Python packages). It can be run from a basic cmd.exe Window (i.e. activating the MSBuildTools environment is not required).

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

Next, invoke packaging.py to produce an Inno installer.:

$ py -3 contrib\packaging\packaging.py \
    inno --pyoxidizer-target x86_64-pc-windows-msvc

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.