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julia.jl
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julia.jl
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import JSON
import Downloads
using Git: git
using Base.BinaryPlatforms: Platform, triplet
const VERSIONS_URL = "https://julialang-s3.julialang.org/bin/versions.json"
function get_julia_release(spec::String)
dirpath = mktempdir()
if spec == "nightly"
@debug "Downloading nightly build..."
url = if Sys.islinux() && Sys.ARCH == :x86_64
"https://julialangnightlies-s3.julialang.org/bin/linux/x64/julia-latest-linux64.tar.gz"
elseif Sys.islinux() && Sys.ARCH == :i686
"https://julialangnightlies-s3.julialang.org/bin/linux/x86/julia-latest-linux32.tar.gz"
elseif Sys.islinux() && Sys.ARCH == :aarch64
"https://julialangnightlies-s3.julialang.org/bin/linux/aarch64/julia-latest-linuxaarch64.tar.gz"
else
error("Don't know how to get nightly build for $(Sys.MACHINE)")
end
# download and extract to a temporary directory, but don't keep the tarball
Pkg.PlatformEngines.download_verify_unpack(url, nothing, dirpath;
ignore_existence=true)
else
@debug "Checking if '$spec' is an official release..."
# the spec needs to be a valid version number
version_spec = tryparse(VersionNumber, spec)
if isnothing(version_spec)
@warn "Not a valid release name"
return nothing
end
# download the versions.json and look up the version
versions = JSON.parse(sprint(io->Downloads.download(VERSIONS_URL, io)))
if !haskey(versions, string(version_spec))
@warn "Unknown release name '$spec'"
return nothing
end
files = versions[string(version_spec)]["files"]
# find a file entry for our machine
platform = parse(Platform, Sys.MACHINE) # don't use Sys.MACHINE directly as it may
# contain unnecessary tags, like -pc-
i = findfirst(files) do file
file["triplet"] == triplet(platform)
end
if isnothing(i)
@error "Release unavailable for $(Sys.MACHINE)"
return nothing
end
file = files[i]
# download and extract to a temporary directory
filename = basename(file["url"])
filepath = joinpath(download_dir, filename)
Pkg.PlatformEngines.download_verify_unpack(file["url"], file["sha256"], dirpath;
tarball_path=filepath, force=true,
ignore_existence=true)
end
return dirpath
end
# NOTE: Julia repo dir isn't cached, as it's only checked-out once and removed afterwards
get_julia_repo(spec) = get_github_repo(spec, "JuliaLang/julia")
function get_repo_details(repo)
version = VersionNumber(read(joinpath(repo, "VERSION"), String))
hash = chomp(read(`$(git()) -C $repo rev-parse --verify HEAD`, String))
shorthash = hash[1:10]
return (; version, hash, shorthash)
end
function get_julia_build(repo)
@debug "Trying to download a Julia build..."
repo_details = get_repo_details(repo)
if Sys.islinux() && Sys.ARCH == :x86_64
url = "https://julialangnightlies.s3.amazonaws.com/bin/linux/x64/$(repo_details.version.major).$(repo_details.version.minor)/julia-$(repo_details.shorthash)-linux64.tar.gz"
else
@debug "Don't know how to get build for $(Sys.MACHINE)"
return nothing
end
# download and extract to a temporary directory
filename = basename(url)
filepath = joinpath(download_dir, filename)
dirpath = mktempdir()
try
Pkg.PlatformEngines.download_verify_unpack(url, nothing, dirpath;
tarball_path=filepath, force=true,
ignore_existence=true)
return dirpath
catch err
@debug "Could not download build" exception=(err, catch_backtrace())
return nothing
end
end
"""
install_dir = build_julia(repo_path, config)
Build the Julia check-out at `repo_path` with the properties (build flags, command, and
resulting Julia binary) from `config`.
"""
function build_julia(_repo_path::String, config::Configuration)
repo_details = get_repo_details(_repo_path)
println("Building Julia...")
# copy the repository so that we can mutate it (add Make.user, build in-place, etc)
repo_path = mktempdir()
cp(_repo_path, repo_path; force=true)
# Pre-populate the srccache and save the downloaded files
srccache = joinpath(download_dir, "srccache")
repo_srccache = joinpath(repo_path, "deps", "srccache")
cp(srccache, repo_srccache)
cd(repo_path) do
Base.run(ignorestatus(`make -C deps getall NO_GIT=1`))
end
for file in readdir(repo_srccache)
if !ispath(joinpath(srccache, file))
cp(joinpath(repo_srccache, file), joinpath(srccache, file))
end
end
# Define a Make.user
open("$repo_path/Make.user", "w") do io
cpu_target = if Sys.ARCH == :x86_64
"generic;sandybridge,-xsaveopt,clone_all;haswell,-rdrnd,base(1)"
elseif Sys.ARCH == :i686
"pentium4;sandybridge,-xsaveopt,clone_all"
elseif Sys.ARCH == :armv7l
"armv7-a;armv7-a,neon;armv7-a,neon,vfp4"
elseif Sys.ARCH == :aarch64
"generic;cortex-a57;thunderx2t99;carmel"
elseif Sys.ARCH == :powerpc64le
"pwr8"
else
@warn "Cannot determine JULIA_CPU_TARGET for unknown architecture $(Sys.ARCH)"
nothing
end
if cpu_target !== nothing
println(io, "JULIA_CPU_TARGET=$cpu_target")
end
println(io, "prefix=/install")
for flag in config.buildflags
println(io, "override $flag")
end
end
# build and install Julia
install_dir = mktempdir()
build_config = Configuration(; xvfb=false)
mounts = Dict(
"/source:rw" => repo_path,
"/install:rw" => install_dir
)
script = raw"""
set -ue
cd /source
cp LICENSE.md /install
# prevent building documentation
mkdir -p doc/_build/html/en
touch doc/_build/html/en/index.html
export MAKEFLAGS="-j$(nproc)"
""" * config.buildcommands * "\n" * raw"""
contrib/fixup-libgfortran.sh /install/lib/julia
contrib/fixup-libstdc++.sh /install/lib /install/lib/julia
"""
try
sandboxed_cmd(build_config, `/bin/bash -c $script`; mounts)
catch err
rm(install_dir; recursive=true)
rethrow()
finally
rm(repo_path; recursive=true)
end
return install_dir
end
function _install_julia(config::Configuration)
if can_use_binaries(config)
# check if it's an official release
dir = get_julia_release(config.julia)
if dir !== nothing
return joinpath(dir, only(readdir(dir)))
end
end
# try to resolve to a Julia repository and hash
repo = get_julia_repo(config.julia)
if repo === nothing
error("Could not check-out Julia repository for $(config.julia)")
end
try
repo_details = get_repo_details(repo)
@debug "Julia $config.julia resolved to v$(repo_details.version), Git SHA $(repo_details.hash)"
if can_use_binaries(config)
# see if we can download a build
dir = get_julia_build(repo)
if dir !== nothing
return joinpath(dir, only(readdir(dir)))
end
end
# perform a build
build_julia(repo, config)
finally
rm(repo; recursive=true)
end
end
const julia_lock = ReentrantLock()
const julia_cache = Dict()
function install_julia(config::Configuration)
lock(julia_lock) do
key = (config.julia, config.buildflags, config.buildcommands)
dir = get(julia_cache, key, nothing)
if dir === nothing || !isdir(dir)
julia_cache[key] = _install_julia(config)
end
return julia_cache[key]
end
end