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pants13-pre: pre-download the native engine

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This saves pants 1.3 from having to download it at startup. Eventually
we'll build it ourselves (it's a rust binary) but for now this works.
This commit is contained in:
Dan Peebles 2017-05-23 19:38:25 -04:00
parent 39e042fd64
commit b0adb09b32
1 changed files with 47 additions and 2 deletions
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49
pkgs/development/tools/build-managers/pants/default.nix
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@ -1,4 +1,4 @@
{ stdenv, pythonPackages }:
{ stdenv, pythonPackages, runCommand, curl }:
with stdenv.lib;
with pythonPackages;
@ -22,6 +22,37 @@ let
maintainers = with maintainers; [ copumpkin ];
};
};
pants13-version = "1.3.0rc2";
# TODO: compile the rust native engine ourselves so we don't need to do this shit. We don't use
# fetchurl because we don't know the URL ahead of time, even though it's deterministic. So we have
# this downloader figure out the URL on the fly and then produce the deterministic result, so we
# can still be a fixed-output derivation.
pants13-native-engine-prefix = {
"x86_64-darwin" = "mac/10.11";
"x86_64-linux" = "linux/x86_64";
"i686-linux" = "linux/i386";
}.${stdenv.system} or (throw "Unsupported system ${stdenv.system}!");
pants13-native-engine = runCommand "pants-native-${pants13-version}" {
buildInputs = [ curl ];
outputHashMode = "recursive";
outputHashAlgo = "sha256";
outputHash = "0n8z7rg0yfpxplvcw88lwv733zkhbzhc4w4zd4aznbcmfqdiz5br";
} ''
native_version=$(curl -k -L https://raw.githubusercontent.com/pantsbuild/pants/release_${pants13-version}/src/python/pants/engine/subsystem/native_engine_version)
curl -kLO "https://dl.bintray.com/pantsbuild/bin/build-support/bin/native-engine/${pants13-native-engine-prefix}/$native_version/native_engine.so"
# Ugh it tries to "download" from this prefix so let's just replicate their directory structure for now...
mkdir -p $out/bin/native-engine/${pants13-native-engine-prefix}/$native_version/
# These should behave the same way in Nix land and we try not to differentiate between OS revisions...
ln -s 10.11 $out/bin/native-engine/mac/10.10
ln -s 10.11 $out/bin/native-engine/mac/10.12
cp native_engine.so $out/bin/native-engine/${pants13-native-engine-prefix}/$native_version/
'';
in {
pants =
pythonPackages.buildPythonPackage rec {
@ -61,7 +92,7 @@ in {
pants13-pre = buildPythonApplication rec {
pname = "pantsbuild.pants";
version = "1.3.0rc2";
version = pants13-version;
name = "${pname}-${version}";
src = fetchPypi {
@ -71,6 +102,9 @@ in {
prePatch = ''
sed -E -i "s/'([[:alnum:].-]+)[=><][[:digit:]=><.,]*'/'\\1'/g" setup.py
substituteInPlace src/pants/option/global_options.py \
--replace "'/etc/pantsrc'" "'$out/etc/pantsrc', '/etc/pantsrc'"
'';
# Unnecessary, and causes some really weird behavior around .class files, which
@ -84,6 +118,17 @@ in {
fasteners coverage pywatchman futures cffi
];
# Teach pants about where its native engine lives.
# TODO: there's probably a better way to teach it this without having it "download"
# from a local file: URL to its cache, but I don't know how and this seems to work.
postFixup = ''
mkdir -p $out/etc
cat >$out/etc/pantsrc <<EOF
[binaries]
baseurls: [ 'file://${pants13-native-engine}' ]
EOF
'';
meta = {
description = "A build system for software projects in a variety of languages";
homepage = "http://www.pantsbuild.org/";