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116 lines
3.0 KiB
ReStructuredText
116 lines
3.0 KiB
ReStructuredText
==================
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Coding conventions
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==================
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General conventions
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===================
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All executable files should have a name with lowercase.
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Tabs are forbidden everywhere.
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Try to set the maximum line length to 80 characters. Long lines can be
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automatically reformatted in vim by pressing :kbd:`gqj`.
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Use blank lines between blocks to improve readability.
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For existing files, stay faithful to the existing indentation.
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Shell scripts
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=============
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Executables should have no extension. To know if the file is binary, or in
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what shell scripting language it was written, the :command:`file` command can
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be used. In addition, all the shell scripts should be under
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:file:`${QP_ROOT}/scripts/`.
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The exit code of the script should be 0 upon success only.
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Bash and Python2 are the only shell scripting language permitted for
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executables.
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Bash
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----
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* Bash scripts should start with ``#!/bin/bash``
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* All error messages should go to standard error, and should be prefixed with
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the name of the command. For example, in Bash use
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.. code:: bash
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function echo_err() {
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2>& echo $(basename $0)": error"
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}
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* The command-line options should be handled with ``getopt``.
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* The script should check that the command-line arguments are consistent.
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* Long options should be preferred to short options.
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* Always quote strings containing variables, command substitutions, spaces or
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shell meta characters, unless careful unquoted expansion is required.
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* Use ``"$@"`` unless you have a specific reason to use ``$*``.
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* Use ``$(command)`` instead of backticks, because they can be easily nested.
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* ``[[ ... ]]`` is preferred over ``[``, ``test`` and ``/usr/bin/[``.
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* Declare function-specific variables with local. Declaration and assignment
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should be on different lines.
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* Pipelines should be split one per line if they don't all fit on one line.
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* Put ``; do`` and ``; then`` on the same line as the ``while``, ``for`` or ``if``.
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Python
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------
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Only Python2 is supported. The reason is that some dependencies use Python2,
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and we do not want yet to add an extra dependency to Python3.
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Python scripts should start with ``#!/usr/bin/env python2`` to mention
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explicitly that Python2 has to be used.
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:command:`pylint` should be used to increase the quality of the source code.
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IRPF90
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======
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The code can be automatically indented with :command:`irp_indent`.
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Lines sould not be longer than 80 characters.
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Mathematical formulas in the `BEGIN_DOC...END_DOC` sections sould be written in
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LaTeX format, between `$` symbols.
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All the providers, subroutines and functions should have a
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`BEGIN_DOC...END_DOC` block.
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Providers should never be present in the same file as a main program.
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String must not use double quotes (`"`) but single quotes (`'`).
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After a `read` statement there should be no comma.
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Only standard Fortran is allowed : Intel or GNU extensions are forbidden.
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The name of a program should be the same as the name of the file. For example,
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for the :ref:`fci` program, we have
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.. code-block:: fortan
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program fci
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and the file is named :file:`fci.irp.f`.
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