Update install instructions

doc/src/08A1264175343E6E.pub

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doc/src/install.rst

@@ -1,13 +1,35 @@
 Installation instructions
 =========================
 
+See :ref:`install-using-pip` for the short version of the install
+instructions.
+
+
 System requirements
 -------------------
 
-+ Python 2.7 or 3.4 and newer.
++ Python 3.4 or newer.
 + `setuptools`_.
 + `pytest`_ 3.7.0 or newer.
 
+Optional library packages
+.........................
+
+These packages are not needed to install or use pytest-dependency.
+They are mostly only needed by the maintainer.
+
++ `git-props`_
+
+  This package is used to extract some metadata such as the version
+  number out of git, the version control system.  All releases embed
+  that metadata in the distribution.  So this package is only needed
+  to build out of the plain development source tree as cloned from
+  GitHub, but not to build a release distribution.
+
++ `distutils-pytest`_ >= 0.2
+
+  Only needed to run the test suite.
+
 
 .. _install-other-packages:
 
@@ -30,40 +52,79 @@ Interaction with other packages
    you do not enable parallelization in pytest-xdist.
 
 
-Download
---------
+Installation
+------------
 
-The latest release version of pytest-dependency is available on the
-`Python Package Index (PyPI)`__.
+.. _install-using-pip:
 
-.. __: https://pypi.python.org/pypi/pytest_dependency/
+Installation using pip
+......................
 
+You can install pytest-dependency from the `Python Package Index
+(PyPI)`__ using pip::
 
-Installation
-------------
+  $ pip install pytest-dependency
 
-1. Download the sources, unpack, and change into the source directory.
+Note that while installing from PyPI is convenient, there is no way to
+verify the integrity of the source distribution, which may be
+considered a security risk.
 
-2. Build (optional)::
+.. __: `PyPI site`_
+
+Manual installation from the source distribution
+................................................
+
+Release distributions are published on the GitHub.  Steps to manually
+build from the source distribution:
+
+1. Download the sources.
+
+   The `Release Page`__ offers download of the source distribution
+   ``pytest-dependency-X.X.tar.gz`` and a detached signature file
+   ``pytest-dependency-X.X.tar.gz.asc``, where the "X.X" is to be
+   replaced by the version number.
+
+2. Check the signature (optional).
+
+   You may verify the integrity of the source distribution by checking
+   the signature::
+
+     $ gpg --verify pytest-dependency-0.5.1.tar.gz.asc 
+     gpg: assuming signed data in 'pytest-dependency-0.5.1.tar.gz'
+     gpg: Signature made Fri Feb 14 21:58:30 2020 CET
+     gpg:                using RSA key B4EB920861DF33F31B55A07C08A1264175343E6E
+     gpg: Good signature from "Rolf Krahl <[email protected]>" [ultimate]
+     gpg:                 aka "Rolf Krahl <[email protected]>" [ultimate]
+     gpg:                 aka "Rolf Krahl <[email protected]>" [ultimate]
+
+   The signature should be made by the key
+   :download:`0xB4EB920861DF33F31B55A07C08A1264175343E6E
+   <08A1264175343E6E.pub>`.  The fingerprint of that key is::
+
+     B4EB 9208 61DF 33F3 1B55  A07C 08A1 2641 7534 3E6E
+
+3. Unpack and change into the source directory.
+
+4. Build (optional)::
 
      $ python setup.py build
 
-3. Test (optional)::
+5. Test (optional)::
 
-     $ python -m pytest tests
+     $ python setup.py test
 
-4. Install::
+6. Install::
 
      $ python setup.py install
 
-The last step might require admin privileges in order to write into
-the site-packages directory of your Python installation.
-
-For production use, it is always recommended to use the latest release
-version from PyPI, see above.
+.. __: `GitHub latest release`_
 
 
 .. _setuptools: http://pypi.python.org/pypi/setuptools/
 .. _pytest: http://pytest.org/
+.. _git-props: https://github.com/RKrahl/git-props
+.. _distutils-pytest: https://github.com/RKrahl/distutils-pytest
 .. _pytest-order: https://github.com/pytest-dev/pytest-order
 .. _pytest-xdist: https://github.com/pytest-dev/pytest-xdist
+.. _PyPI site: https://pypi.python.org/pypi/pytest_dependency/
+.. _GitHub latest release: https://github.com/RKrahl/pytest-dependency/releases/latest