python2: Enable pip.

extra/python2/build

@@ -1,8 +1,10 @@
 #!/bin/sh -e
 
+patch -p1 < python2-always-pip.patch
+
 ./configure \
     --prefix=/usr \
-    --without-ensurepip
+    --with-ensurepip=yes
 
 make
 make DESTDIR="$1" install
@@ -22,5 +24,5 @@ chmod u+w "$1/usr/lib/libpython"*.a
     rm -rf lib2to3 pydoc* idlelib turtle* ensurepip lib-tk config
 
     cd "$1/usr/bin"
-    rm -f 2to3* pydoc* idle* python
+    rm -f 2to3* pydoc* idle* python pip
 }

extra/python2/checksums

@@ -1 +1,2 @@
 b62c0e7937551d0cc02b8fd5cb0f544f9405bafc9a54d3808ed4594812edef43  Python-2.7.18.tar.xz
+1a184c64f85d7a2fb57642135ea298ddd005684c5bd3e601b932cf31b82b9417  python2-always-pip.patch

extra/python2/patches/python2-always-pip.patch

@@ -0,0 +1,13 @@
+diff --git a/Lib/ensurepip/__init__.py b/Lib/ensurepip/__init__.py
+index 526dfd0..d85dc33 100644
+--- a/Lib/ensurepip/__init__.py
++++ b/Lib/ensurepip/__init__.py
+@@ -104,7 +104,7 @@ def _bootstrap(*, root=None, upgrade=False, user=False,
+             additional_paths.append(os.path.join(tmpdir, wheel_name))
+ 
+         # Construct the arguments to be passed to the pip command
+-        args = ["install", "--no-index", "--find-links", tmpdir]
++        args = ["install", "-I", "--no-index", "--find-links", tmpdir]
+         if root:
+             args += ["--root", root]
+         if upgrade:

extra/python2/sources

@@ -1 +1,2 @@
 https://www.python.org/ftp/python/2.7.18/Python-2.7.18.tar.xz
+patches/python2-always-pip.patch

extra/python2/version

@@ -1 +1 @@
-2.7.18 2
+2.7.18 3