Update to 2020 release

It is May of 2020 and langkit is still based entirely on python 2.
Because many of the required makedepends have been dropped from the
repos, they would have to be recreated in the AUR. Nobody got time for
that, so we simply download all the required wheels and install them in
a virtualenv with pip.

1 files changed, 204 insertions, 33 deletions

diff --git a/PKGBUILD b/PKGBUILD
index 5a351253dcc5..2a2ec2509307 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,62 +1,233 @@
+# Maintainer: xiretza <xiretza+aur@gmail.com>
 # Maintainer: Rod Kay   <charlie5 on #ada at freenode.net>
 
 pkgname=libadalang
-pkgver=2019
-pkgrel=2
+_libadalang_ver=2020-20200429-19982
+_langkit_ver=2020-20200429-19994
+pkgver=2020
+pkgrel=1
 pkgdesc="A high performance semantic engine for the Ada programming language."
 
 arch=('i686' 'x86_64')
 url="https://github.com/AdaCore/libadalang"
 license=('GPL')
 
-depends=("gnatcoll-iconv" "gnatcoll-gmp"
-         "quex-for_libadalang" "python2-mako" "python-yaml" "python-sphinx"
-         "python-coverage" "python2-enum34" "python-psutil" "python2-docutils" "python2-funcy"
-         "autopep8" "yapf")
-
-makedepends=("gprbuild")
-
-conflicts=('libadalang-git')
-
-source=('https://community.download.adacore.com/v1/d9ecaed902d34eb3162f3c255da2d5763b495170?filename=libadalang-2019-20190510-19916-src.tar.gz'
-        'https://community.download.adacore.com/v1/30c1718fc91e7da1c8a359e5862a44c814daf592?filename=langkit-2019-20190510-19B8C-src.tar.gz')
-sha1sums=('d9ecaed902d34eb3162f3c255da2d5763b495170'
-          '30c1718fc91e7da1c8a359e5862a44c814daf592')
+depends=("gnatcoll-core" "gnatcoll-iconv" "gnatcoll-gmp")
+makedepends=('gprbuild' 'python2-virtualenv' 'python2-setuptools')
+
+_libadalang_checksum=b08f8035da44c241348f8b597dbdaf95a4d43cc7
+_langkit_checksum=842969ffaa118d71e1efc466383f1c0cf663c464
+source=("libadalang-$_libadalang_ver-src.tar.gz::https://community.download.adacore.com/v1/${_libadalang_checksum}?filename=libadalang-$_libadalang_ver-src.tar.gz"
+        "langkit-$_langkit_ver-src.tar.gz::https://community.download.adacore.com/v1/${_langkit_checksum}?filename=langkit-$_langkit_ver-src.tar.gz")
+noextract=()
+sha1sums=("$_libadalang_checksum"
+          "$_langkit_checksum")
+sha256sums=('SKIP'
+            'SKIP')
+
+# This is an absolutely ugly hack to install all the python2 build dependencies
+# (most of them have been dropped from repos and getting them into the AUR just
+# for this package would be way too much effort). It works because they are
+# only required for building, not at runtime - so they are fetched as sources
+# and then installed in the build environment with pip (in a virtualenv).
+#
+# These variable assignments are generated from the libadalang REQUIREMENTS.dev
+# using the attached gen_PKGBUILD_sources.sh script.
+source+=(
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+
+prepare()
+{
+  cd "$srcdir/libadalang-$_libadalang_ver-src"
+  virtualenv2 "$srcdir/venv"
 
+  (
+    source "$srcdir/venv/bin/activate"
+    pip install --no-index --find-links "$srcdir" -r <(grep -v langkit REQUIREMENTS.dev)
+  )
+}
 
 build() 
 {
-  cd $srcdir/libadalang-2019-20190510-19916-src
-
-  # Ensure that QUEX_PATH is set.
-  #
-  source /etc/profile.d/quex.sh
+  cd "$srcdir/libadalang-$_libadalang_ver-src"
 
-  export PYTHONPATH=$srcdir/langkit-2019-20190510-19B8C-src:$PYTHONPATH
+  (
+    source "$srcdir/venv/bin/activate"
 
-  # Clang has trouble compiling the Quex-generated lexer, so make sure
-  # GPRbuild chooses GCC.
-  gprconfig -o config.cgpr --batch --config=c,,,,GCC --config=ada,,,,
+    export PYTHONPATH="$srcdir/langkit-$_langkit_ver-src:$PYTHONPATH"
 
-  python2 ada/manage.py generate
-  python2 ada/manage.py build --gargs="-XBUILD_MODE=prod -R --config=$PWD/config.cgpr"
+    python2 ada/manage.py generate
+    python2 ada/manage.py build --build-mode=prod --gargs="-R -cargs $CFLAGS -largs $LDFLAGS -gargs"
+  )
 }
 
 
 package()
 {
-  cd $srcdir/libadalang-2019-20190510-19916-src
+  cd "$srcdir/libadalang-$_libadalang_ver-src"
 
-  # Ensure that QUEX_PATH is set.
-  #
-  source /etc/profile.d/quex.sh
+  (
+    source "$srcdir/venv/bin/activate"
 
-  python2 ada/manage.py install $pkgdir/usr
+    export PYTHONPATH="$srcdir/langkit-$_langkit_ver-src:$PYTHONPATH"
+
+    python2 ada/manage.py install --build-mode=prod "$pkgdir/usr"
+  )
 
   # Install the Python binding
-  #
+  # Has to happen outside virtualenv
   cd build/python
   python2 setup.py install --root="$pkgdir"
 
-  rm -fr $pkgdir/usr/python
+  rm -fr "$pkgdir/usr/python"
+
+  # Fix ocaml bindings location
+  mkdir -p "$pkgdir/usr/lib/ocaml/"
+  mv "$pkgdir/usr/ocaml" "$pkgdir/usr/lib/ocaml/libadalang"
 }