Python: move interpreters

Move Python interpreters (CPython, PyPy) to same folder and share
layout.

pkgs/development/interpreters/python/cpython/docs/generate.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+
+TYPES="html pdf-a4 pdf-letter text"
+URL=http://docs.python.org/ftp/python/doc/VERSION/python-VERSION-docs-TYPE.tar.bz2
+VERSIONS=$(curl http://www.python.org/download/releases/ 2>/dev/null | grep "releases/[123456789]"| cut -d/ -f4 |grep -v "^[12].[012345]" |grep -v "^1.6.1")
+echo "Generating expressions for:
+${VERSIONS}
+"
+
+
+cat >default.nix <<EOF
+{ stdenv, fetchurl, lib }:
+
+let
+pythonDocs = {
+EOF
+
+for type in $TYPES; do
+    cat >>default.nix <<EOF
+  ${type/-/_} = {
+    recurseForDerivations = true;
+EOF
+
+    for version in $VERSIONS; do
+        major=$(echo -n ${version}| cut -d. -f1)
+        minor=$(echo -n ${version}| cut -d. -f2)
+        outfile=${major}.${minor}-${type}.nix
+        hash=
+        if [ -e ${outfile} ]; then
+            currentversion=$(grep "url =" ${outfile} |cut -d/ -f7)
+            if [ ${version} = ${currentversion} ]; then
+                hash=$(grep sha256 ${outfile} | cut -d'"' -f2)
+            fi
+        fi
+        echo "Generating ${outfile}"
+        url=$(echo -n $URL |sed -e "s,VERSION,${version},g" -e "s,TYPE,${type},")
+        sha=$(nix-prefetch-url ${url} ${hash})
+
+        sed -e "s,VERSION,${version}," \
+            -e "s,MAJOR,${major}," \
+            -e "s,MINOR,${minor}," \
+            -e "s,TYPE,${type}," \
+            -e "s,URL,${url}," \
+            -e "s,SHA,${sha}," < template.nix > ${outfile}
+
+        attrname=python${major}${minor}
+        cat >>default.nix <<EOF
+    ${attrname} = import ./${major}.${minor}-${type}.nix {
+      inherit stdenv fetchurl lib;
+    };
+EOF
+
+        echo "done."
+        echo
+    done
+    echo "  };" >> default.nix
+done
+
+echo "}; in pythonDocs" >> default.nix