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Dion Moult
84 lines
2.7 KiB
ReStructuredText
84 lines
2.7 KiB
ReStructuredText
IfcPatch
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========
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IfcPatch is both a CLI utility and library that lets you run a predetermined
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modification on an IFC file, known as a patch recipe. This is great for running
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prepackaged scripts on IFC models on a server with a standardised interface.
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It's also great for distributing little scripts that need to modify an IFC to
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users who don't know how to code or aren't interested in knowing the details.
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Source installation
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-------------------
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1. :doc:`Install IfcOpenShell <ifcopenshell-python/installation>`
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2. `Clone the source code <https://github.com/IfcOpenShell/IfcOpenShell/tree/v0.8.0/src/ifcpatch>`_.
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3. ``cd /path/to/src/ifcpatch``
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Here is a minimal example of how to use IfcPatch as a Python module or CLI
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utility:
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.. code-block:: console
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$ python -m ifcpatch -h
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usage: __main__.py [-h] -i INPUT [-o OUTPUT] -r RECIPE [-l LOG]
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[-a ARGUMENTS [ARGUMENTS ...]]
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Patches IFC files to fix badly formatted data
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optional arguments:
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-h, --help show this help message and exit
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-i INPUT, --input INPUT
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The IFC file to patch
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-o OUTPUT, --output OUTPUT
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The output file to save the patched IFC
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-r RECIPE, --recipe RECIPE
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Name of the recipe to use when patching
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-l LOG, --log LOG Specify a log file
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-a ARGUMENTS [ARGUMENTS ...], --arguments ARGUMENTS [ARGUMENTS ...]
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Specify custom arguments to the patch recipe
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Exactly how it is run depends on the recipe. A recipe may require zero or more
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arguments which are specific to the recipe. Here's an example which runs the
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`ExtractElements` recipe, which, as the same suggests, extracts out elements.
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This recipe expects one argument, which uses the
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:ref:`ifcopenshell-python/selector_syntax:filtering elements` syntax. In this
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example, we'll extract out all `IfcWall` elements.
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.. code-block:: bash
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ifcpatch -i input.ifc -o output.ifc -r ExtractElements -a "IfcWall"
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cat output.ifc
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Here is a minimal example of how to use IfcPatch as a library:
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.. code-block:: python
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import ifcpatch
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output = ifcpatch.execute({
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"input": "input.ifc",
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"file": ifcopenshell.open("input.ifc"),
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"recipe": "ExtractElements",
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"arguments": ["IfcWall"],
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})
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ifcpatch.write(output, "output.ifc")
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You can also alias it to a command:
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.. code-block:: bash
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alias ifcpatch='python -m ifcpatch'
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Alternatively, you can package it as an executable.
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.. code-block:: bash
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python make.py
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./dist/ifcpatch
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Patch recipes
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-------------
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You can view all built-in patches in IfcPatch here: :doc:`List of IfcPatch recipes <autoapi/ifcpatch/recipes/index>`.
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