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Doing stuff :command:`apt-get` does |
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:Author: Julian Andres Klode <[email protected]> |
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:Release: |release| |
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:Date: |today| |
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The following article will show how you can use python-apt to do actions done |
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by the :command:`apt-get` command. |
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Printing the URIs of all index files |
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We all now that we can print the URIs of all our index files by running a |
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simple ``apt-get --print-uris update``. We can do the same. Responsible for |
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the source entries is the class :class:`apt_pkg.SourceList`, which can be |
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combined with an :class:`apt_pkg.Acquire` object using :meth:`get_indexes`. |
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First of all, we have to create the objects:: |
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acquire = apt_pkg.Acquire() |
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slist = apt_pkg.SourceList() |
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Now we have to parse /etc/apt/sources.list and its friends, by using |
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:meth:`apt_pkg.SourceList.read_main_list`:: |
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slist.read_main_list() |
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The **slist** object now knows about the location of the indexes. We now have |
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to load those indexes into the *acquire* object by calling |
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:meth:`apt_pkg.SourceList.get_indexes`:: |
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slist.get_indexes(acquire, True) |
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The first argument is the acquire object into which we will load these indexes, |
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and the second argument means that we want to fetch all indexes. Now the only |
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thing left to do is iterating over the list of items and printing out their |
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URIs. Luckily, there is :attr:`apt_pkg.Acquire.items` which allows us to |
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iterate over the items:: |
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for item in acquire.items: |
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print(item.desc_uri) |
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In the end a program could look like this: |
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.. literalinclude:: ../examples/update-print-uris.py |
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