findent: powerful Fortran formatter

What is it?

findent indents/beautifies/converts and can optionally generate the dependencies of Fortran sources.

Features

• Supports Fortran-66 up to Fortran-2018
• Converts from Fixed Form to Free Form and vice-versa
• Honours cpp and coco preprocess statements
• Honours OpenMP conditionals
• Validated against all constructs in 'Modern Fortran explained, Incorporating Fortran 2018, Metcalf e.a.'
• Supported platformrs: Unix and Windows
• High speed: 50K - 100K lines per second
• vim, gedit, emacs: findent optionally emits configuration files for these editors to use findent as a plugin.

Installation

Normal installation using pip

pip install findent

Supported platforms

Examples

Format file in.f90 to out.f90

findent < in.f90 > out.f90

Format with 4-space indentation and convert Fixed Form in.f to Free Form out.f90

findent -i4 -ofree < in.f > out.f90

Format and refactor all files with .f extension in the current directory

wfindent -i4 -Rr *.f

Generating Fortran source dependencies for use in Makefile

findent will generate a dependency list for:

• definitions and uses of modules and submodules
• include, #include and ??include statements

In your Makefile add something similar to:

findent --makefdeps > makefdeps
chmod +x makefdeps

include deps
dep deps:
  ./makefdeps *.f90 > deps

The flag --makefdeps generates a script in the standard output. Depending on your usecase the script might not suffice and you will need to write your own version.

Editor incorporation

(G) VIM users

Installation instructions:

findent --vim_help

Documentation:

:help equalprg

:help indentexpr

GEDIT users

Installation instructions:

findent --gedit_help

EMACS users

Installation instructions:

findent --emacs_help