pkg(pure-0.68): Add pure-lang 0.68 (#178)

* pkg(pure-0.68): Add pure-lang 0.68

* pkg(pure-0.68): Remove `--strip-components` flag and use SemVer.

* pkg(pure-0.68):Add -O flag on curl, so it just outputs to stdout

* pkg(pure-0.68):Add -L flag on curl, so that it can allow redirects.

* pkg(pure-0.68): Goodbye `v` flag from tar.

* pkg(pure-0.68): Add python alias.

* pkg(pure-0.68): Disable docs.

* pkg(pure-0.68): Fix settings for enable docs.

* Update build.sh

* Update environment

* Whoops typo.

* pkg(pure-0.68):Use semver naming method i.e. instead `0.68` it should be `0.68.0`

Co-authored-by: Shivansh-007 <Shivansh-007@users.noreply.github.com>

packages/pure/0.68.0/build.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+PREFIX=$(realpath $(dirname $0))
+
+# Python is available in the container as 'python3' and 'python2', not as 'python'
+alias python=python3
+
+# Installing LLVM and clang (the latter is optional but recommended)
+curl -OL "http://llvm.org/releases/3.4/llvm-3.4.src.tar.gz"
+curl -OL "http://llvm.org/releases/3.4/clang-3.4.src.tar.gz"
+tar xfz llvm-3.4.src.tar.gz
+tar xfz clang-3.4.src.tar.gz
+
+mv clang-3.4 llvm-3.4/tools/clang
+# Cleaning up gzip files.
+rm llvm-3.4.src.tar.gz && rm clang-3.4.src.tar.gz
+cd llvm-3.4
+
+# Building and installing - LLVM and clang
+./configure --prefix="$PREFIX" --enable-optimized --enable-targets=host-only --enable-docs="no" --enable-assertions="no"
+make -j$(nproc)
+make install -j$(nproc)
+
+# Installing Pure
+curl -sSLO "https://github.com/agraef/pure-lang/releases/download/pure-0.68/pure-0.68.tar.gz"
+tar xfz pure-0.68.tar.gz
+rm pure-0.68.tar.gz
+cd pure-0.68
+
+# Building and installing pure-lang
+./configure --prefix="$PREFIX" --enable-release --with-tool-prefix="$PREFIX/bin" --with-static-llvm
+make -j$(nproc)
+make install -j$(nproc)