Add "requirements.txt" file.

Author: KelSolaar

requirements.txt

@@ -0,0 +1,70 @@
+alabaster==0.7.12
+atomicwrites==1.3.0
+attrs==19.2.0
+babel==2.7.0
+biblib-simple==0.1.1
+bleach==3.1.0
+certifi==2019.9.11
+chardet==3.0.4
+colorama==0.4.1; sys_platform == "win32"
+colour-science==0.3.13
+coverage==4.5.4
+coveralls==1.8.2
+docopt==0.6.2
+docutils==0.15.2
+entrypoints==0.3
+flake8==3.7.8
+idna==2.8
+imageio==2.5.0
+imagesize==1.1.0
+importlib-metadata==0.23; python_version < "3.8"
+invoke==1.3.0
+jinja2==2.10.3
+latexcodec==1.0.7
+markupsafe==1.1.1
+mccabe==0.6.1
+mock==3.0.5
+more-itertools==7.2.0
+nose==1.3.7
+numpy==1.17.2
+opencv-python==4.1.1.26
+oset==0.1.3
+packaging==19.2
+pathlib2==2.3.5; python_version < "3.6"
+pillow==6.2.0
+pkginfo==1.5.0.1
+pluggy==0.13.0
+py==1.8.0
+pybtex==0.22.2
+pybtex-docutils==0.2.1
+pycodestyle==2.5.0
+pyflakes==2.1.1
+pygments==2.4.2
+pyparsing==2.4.2
+pytest==5.2.0
+pytz==2019.2
+pyyaml==5.1.2
+readme-renderer==24.0
+requests==2.22.0
+requests-toolbelt==0.9.1
+restructuredtext-lint==1.3.0
+scipy==1.3.1
+six==1.12.0
+snowballstemmer==2.0.0
+sphinx==2.2.0
+sphinx-rtd-theme==0.4.3
+sphinxcontrib-applehelp==1.0.1
+sphinxcontrib-bibtex==1.0.0
+sphinxcontrib-devhelp==1.0.1
+sphinxcontrib-htmlhelp==1.0.2
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==1.0.2
+sphinxcontrib-serializinghtml==1.1.3
+toml==0.10.0
+tqdm==4.36.1
+twine==1.15.0
+urllib3==1.25.6
+wcwidth==0.1.7
+webencodings==0.5.1
+yapf==0.23.0
+zipp==0.6.0; python_version < "3.8"

tasks.py

@@ -28,8 +28,8 @@
 __all__ = [
     'APPLICATION_NAME', 'APPLICATION_VERSION', 'PYTHON_PACKAGE_NAME',
     'PYPI_PACKAGE_NAME', 'BIBLIOGRAPHY_NAME', 'clean', 'formatting', 'tests',
-    'quality', 'examples', 'docs', 'todo', 'preflight', 'build', 'virtualise',
-    'tag', 'release', 'sha256'
+    'quality', 'examples', 'preflight', 'docs', 'todo', 'requirements',
+    'build', 'virtualise', 'tag', 'release', 'sha256'
 ]
 
 APPLICATION_NAME = colour_checker_detection.__application_name__
@@ -212,6 +212,26 @@ def examples(ctx):
             ctx.run('python {0}'.format(os.path.join(root, filename)))
 
 
+@task(formatting, tests, quality, examples)
+def preflight(ctx):
+    """
+    Performs the preflight tasks, i.e., *formatting*, *tests*, *quality*, and
+    *examples*.
+
+    Parameters
+    ----------
+    ctx : invoke.context.Context
+        Context.
+
+    Returns
+    -------
+    bool
+        Task success.
+    """
+
+    message_box('Finishing "Preflight"...')
+
+
 @task
 def docs(ctx, html=True, pdf=True):
     """
@@ -265,11 +285,10 @@ def todo(ctx):
         ctx.run('./export_todo.py')
 
 
-@task(formatting, tests, quality, examples)
-def preflight(ctx):
+@task
+def requirements(ctx):
     """
-    Performs the preflight tasks, i.e., *formatting*, *tests*, *quality*, and
-    *examples*.
+    Export the *requirements.txt* file.
 
     Parameters
     ----------
@@ -282,10 +301,12 @@ def preflight(ctx):
         Task success.
     """
 
-    message_box('Finishing "Preflight"...')
+    message_box('Exporting "requirements.txt" file...')
+    ctx.run('poetry export -f requirements.txt --without-hashes --dev '
+            '-o requirements.txt')
 
 
-@task(preflight, todo, docs)
+@task(preflight, docs, todo, requirements)
 def build(ctx):
     """
     Builds the project and runs dependency tasks, i.e., *docs*, *todo*, and