Drop requirements.txt

Move the project's dependencies into pyproject.toml so we can stop
declaring them as dynamic. This way, consumers can infer the list
from sdist package metadata rather than having to resolve it at
build-time when PBR injects the requirements.txt contents into the
package's install_requires.

Change-Id: Idcb73b589db50034a6c7608cbd3f8011070a81cb

CONTRIBUTING.rst

@@ -32,10 +32,11 @@ testr arguments that are needed to nox. For example, you can run:
 It is also possible to run the tests inside of a virtual environment
 you have created, or it is possible that you have all of the dependencies
 installed locally already. If you'd like to go this route, the requirements
-are listed in requirements.txt and the requirements for testing are in
+are listed in pyproject.toml and the requirements for testing are in
 test-requirements.txt. Installing them via pip, for instance, is simply::
 
-  pip install -r requirements.txt -r test-requirements.txt
+  pip install -r test-requirements.txt
+  pip install -e .
 
 In you go this route, you can interact with the testr command directly.
 Running `testr run` will run the entire test suite. `testr run --parallel`

noxfile.py

@@ -17,7 +17,6 @@ def linters(session):
 
 @nox.session(python="3")
 def docs(session):
-    session.install("-r", "requirements.txt")
     session.install("-r", "doc/requirements.txt")
     session.install(".")
     session.run(
@@ -30,7 +29,6 @@ def docs(session):
 
 @nox.session(python="3")
 def venv(session):
-    session.install("-r", "requirements.txt")
     session.install("-r", "test-requirements.txt")
     session.install("-e", ".")
     session.run(*session.posargs)
@@ -39,7 +37,6 @@ def venv(session):
 # This will attempt to run python3 tests by default.
 @nox.session(python=["3"])
 def tests(session):
-    session.install("-r", "requirements.txt")
     session.install("-r", "test-requirements.txt")
     session.install("-e", ".")
     session.run("stestr", "run", *session.posargs)
@@ -48,7 +45,6 @@ def tests(session):
 
 @nox.session(python="3")
 def cover(session):
-    session.install("-r", "requirements.txt")
     session.install("-r", "test-requirements.txt")
     session.install("-e", ".")
     session.env["PYTHON"] = "coverage run --source bindep --parallel-mode"

playbooks/bindep/run.yaml

@@ -4,13 +4,6 @@
   vars:
     bindep_profile: test
   tasks:
-    - name: Install requirements
-      pip:
-        chdir: "{{ zuul_work_dir }}"
-        virtualenv: "{{ zuul_work_virtualenv }}"
-        virtualenv_command: "{{ ensure_pip_virtualenv_command }}"
-        requirements: requirements.txt
-
     - name: Install the project from source
       pip:
         chdir: "{{ zuul_work_dir }}"

pyproject.toml

@@ -29,8 +29,14 @@ classifiers = [
     "Topic :: System :: Archiving :: Packaging",
     "Topic :: Utilities",
 ]
+dependencies = [
+    "distro>=1.7",
+    "packaging",
+    "Parsley",
+    "pbr>=2",
+]
 description = "Binary dependency utility"
-dynamic = ["dependencies", "version"]
+dynamic = ["version"]
 keywords = [
     "binary",
     "commandline",

requirements.txt

@@ -1,4 +0,0 @@
-distro>=1.7.0
-pbr>=2.0.0  # Apache-2.0
-Parsley
-packaging