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Merge pull request #2681 from SvenDowideit/add-instruction-path-limitations

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add a little more info about the limitations of ADD wrt ../ and docker build
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Andy Rothfusz 2013-11-13 10:56:35 -08:00
commit 077c2496ed
1 changed files with 8 additions and 0 deletions
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8
docs/sources/use/builder.rst
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@ -221,8 +221,16 @@ destination container.
All new files and directories are created with mode 0755, uid and gid
0.
.. note::
if you build using STDIN (``docker build - < somefile``), there is no build
context, so the Dockerfile cannot contain an ADD statement.
The copy obeys the following rules:
* The ``<src>`` path must be inside the *context* of the build; you cannot
``ADD ../something /something``, because the first step of a
``docker build`` is to send the context directory (and subdirectories) to
the docker daemon.
* If ``<src>`` is a URL and ``<dest>`` does not end with a trailing slash,
then a file is downloaded from the URL and copied to ``<dest>``.
* If ``<src>`` is a URL and ``<dest>`` does end with a trailing slash,