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Normally, one would add libraries and python modules to a bundle using LD_LIBRARY_PATH
and PYTHONPATH. This gives them priority over the systemwide versions of these items.
However, this is a dangerous approach, as if the included versions are incompatible with
the system, the program will not run. ldshim.py creates a safer alternative, by adding
the bundled binaries to the _end_ of the search path, rather than the beginning, so that
systemwide binaries take precedence.
To produce a bundle from RPMs, one must download them into the bundle path
and then execute
cat [name].rpm | rpm2cpio | cpio -di
for each RPM. This will produce a new root directory tree based on the
current path. One may also need to add other binaries to the tree manually
in directories like usr/bin/.
If adding python modules, it is important to ensure that every directory
recursively containing the python module is world-readable and executable.
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