requirements: Fork pip.txt to pip2.txt for Python 2.

The current version of setuptools no longer supports Python 2.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

requirements/pip2.txt

@@ -0,0 +1,20 @@
+#
+# This file is GENERATED.  Don't edit directly.
+#
+# To update, edit the non-"lock" files in requirements/*.txt, then:
+#
+#    tools/update-locked-requirements
+#
+# For details, see requirements/README.md .
+#
+wheel==0.33.6 \
+    --hash=sha256:10c9da68765315ed98850f8e048347c3eb06dd81822dc2ab1d4fde9dc9702646 \
+    --hash=sha256:f4da1763d3becf2e2cd92a14a7c920f0f00eca30fdde9ea992c836685b9faf28
+
+# The following packages are considered to be unsafe in a requirements file:
+pip==19.3.1 \
+    --hash=sha256:21207d76c1031e517668898a6b46a9fb1501c7a4710ef5dfd6a40ad9e6757ea7 \
+    --hash=sha256:6917c65fc3769ecdc61405d3dfd97afdedd75808d200b2838d7d961cebc0c2c7
+setuptools==42.0.2 \
+    --hash=sha256:c5b372090d7c8709ce79a6a66872a91e518f7d65af97fca78135e1cb10d4b940 \
+    --hash=sha256:c8abd0f3574bc23afd2f6fd2c415ba7d9e097c8a99b845473b0d957ba1e2dac6

scripts/lib/setup_venv.py

@@ -99,9 +99,9 @@ YUM_THUMBOR_VENV_DEPENDENCIES = [
     "gifsicle",
 ]
 
-def install_venv_deps(pip, requirements_file):
-    # type: (str, str) -> None
-    pip_requirements = os.path.join(ZULIP_PATH, "requirements", "pip.txt")
+def install_venv_deps(pip, requirements_file, python2):
+    # type: (str, str, bool) -> None
+    pip_requirements = os.path.join(ZULIP_PATH, "requirements", "pip2.txt" if python2 else "pip.txt")
     run([pip, "install", "--force-reinstall", "--require-hashes", "--requirement", pip_requirements])
     run([pip, "install", "--no-deps", "--require-hashes", "--requirement", requirements_file])
 
@@ -330,10 +330,10 @@ def do_setup_virtualenv(venv_path, requirements_file, python2):
         add_cert_to_pipconf()
 
     try:
-        install_venv_deps(pip, requirements_file)
+        install_venv_deps(pip, requirements_file, python2)
     except subprocess.CalledProcessError:
         # Might be a failure due to network connection issues. Retrying...
         print(WARNING + "`pip install` failed; retrying..." + ENDC)
-        install_venv_deps(pip, requirements_file)
+        install_venv_deps(pip, requirements_file, python2)
 
     run_as_root(["chmod", "-R", "a+rX", venv_path])

tools/update-locked-requirements

@@ -59,5 +59,6 @@ compile_requirements requirements/prod.in "$OUTPUT_BASE_DIR/prod.txt"
 compile_requirements requirements/dev.in "$OUTPUT_BASE_DIR/dev.txt"
 compile_requirements requirements/mypy.in "$OUTPUT_BASE_DIR/mypy.txt"
 compile_requirements requirements/docs.in "$OUTPUT_BASE_DIR/docs.txt"
+compile_requirements requirements/pip.in "$OUTPUT_BASE_DIR/pip2.txt" py2
 compile_requirements requirements/thumbor.in "$OUTPUT_BASE_DIR/thumbor.txt" py2
 compile_requirements requirements/thumbor-dev.in "$OUTPUT_BASE_DIR/thumbor-dev.txt" py2