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# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
from spack import *
import llnl.util.tty as tty
import os
import shutil
class Singularity(MakefilePackage):
'''Singularity is a container technology focused on building portable
encapsulated environments to support "Mobility of Compute" For older
versions of Singularity (pre 3.0) you should use singularity-legacy,
which has a different install base (Autotools).
Needs post-install chmod/chown steps to enable full functionality.
See package definition or `spack-build-out.txt` build log for details.
'''
homepage = "https://www.sylabs.io/singularity/"
url = "https://github.com/sylabs/singularity/releases/download/v3.1.1/singularity-3.1.1.tar.gz"
git = "https://github.com/sylabs/singularity.git"
maintainers = ['ArangoGutierrez', 'alalazo']
version('master', branch='master')
version('3.4.1', sha256='638fd7cc5ab2a20e779b8768f73baf21909148339d6c4edf6ff61349c53a70c2')
version('3.4.0', sha256='eafb27f1ffbed427922ebe2b5b95d1c9c09bfeb897518867444fe230e3e35e41')
version('3.3.0', sha256='070530a472e7e78492f1f142c8d4b77c64de4626c4973b0589f0d18e1fcf5b4f')
version('3.2.1', sha256='d4388fb5f7e0083f0c344354c9ad3b5b823e2f3f27980e56efa7785140c9b616')
version('3.1.1', sha256='7f0df46458d8894ba0c2071b0848895304ae6b1137d3d4630f1600ed8eddf1a4')
depends_on('go')
depends_on('libuuid')
depends_on('libgpg-error')
depends_on('squashfs', type='run')
depends_on('git', when='@develop') # mconfig uses it for version info
depends_on('shadow', type='run', when='@3.3:')
depends_on('cryptsetup', type=('build', 'run'), when='@3.4:')
patch('singularity_v3.4.0_remove_root_check.patch', level=0, when='@3.4.0:3.4.1')
# Go has novel ideas about how projects should be organized.
# We'll point GOPATH at the stage dir, and move the unpacked src
# tree into the proper subdir in our overridden do_stage below.
@property
def gopath(self):
return self.stage.path
@property
def sylabs_gopath_dir(self):
return join_path(self.gopath, 'src/github.com/sylabs/')
@property
def singularity_gopath_dir(self):
return join_path(self.sylabs_gopath_dir, 'singularity')
# Unpack the tarball as usual, then move the src dir into
# its home within GOPATH.
def do_stage(self, mirror_only=False):
super(Singularity, self).do_stage(mirror_only)
if not os.path.exists(self.singularity_gopath_dir):
# Move the expanded source to its destination
tty.debug("Moving {0} to {1}".format(
self.stage.source_path, self.singularity_gopath_dir))
shutil.move(self.stage.source_path, self.singularity_gopath_dir)
# The build process still needs access to the source path,
# so create a symlink.
force_symlink(self.singularity_gopath_dir, self.stage.source_path)
# MakefilePackage's stages use this via working_dir()
@property
def build_directory(self):
return self.singularity_gopath_dir
# Hijack the edit stage to run mconfig.
def edit(self, spec, prefix):
with working_dir(self.build_directory):
configure = Executable('./mconfig --prefix=%s' % prefix)
configure()
# Set these for use by MakefilePackage's default build/install methods.
build_targets = ['-C', 'builddir', 'parallel=False']
install_targets = ['install', '-C', 'builddir', 'parallel=False']
def setup_build_environment(self, env):
# Point GOPATH at the top of the staging dir for the build step.
env.prepend_path('GOPATH', self.gopath)
# `singularity` has a fixed path where it will look for
# mksquashfs. If it lives somewhere else you need to specify the
# full path in the config file. This bit uses filter_file to edit
# the config file, uncommenting and setting the mksquashfs path.
@run_after('install')
def fix_mksquashfs_path(self):
prefix = self.spec.prefix
squash_path = join_path(self.spec['squashfs'].prefix.bin, 'mksquashfs')
filter_file(r'^# mksquashfs path =',
'mksquashfs path = {0}'.format(squash_path),
join_path(prefix.etc, 'singularity', 'singularity.conf'))
#
# Assemble a script that fixes the ownership and permissions of several
# key files, install it, and tty.warn() the user.
# HEADSUP: https://github.com/spack/spack/pull/10412.
#
def perm_script(self):
return 'spack_perms_fix.sh'
def perm_script_tmpl(self):
return "{0}.j2".format(self.perm_script())
def perm_script_path(self):
return join_path(self.spec.prefix.bin, self.perm_script())
def _build_script(self, filename, variable_data):
with open(filename, 'w') as f:
env = spack.tengine.make_environment(dirs=self.package_dir)
t = env.get_template(self.perm_script_tmpl())
f.write(t.render(variable_data))
@run_after('install')
def build_perms_script(self):
script = self.perm_script_path()
chown_files = ['libexec/singularity/bin/starter-suid',
'etc/singularity/singularity.conf',
'etc/singularity/capability.json',
'etc/singularity/ecl.toml']
setuid_files = ['libexec/singularity/bin/starter-suid']
self._build_script(script, {'prefix': self.spec.prefix,
'chown_files': chown_files,
'setuid_files': setuid_files})
chmod = which('chmod')
chmod('555', script)
# Until tty output works better from build steps, this ends up in
# the build log. See https://github.com/spack/spack/pull/10412.
@run_after('install')
def caveats(self):
tty.warn("""
For full functionality, you'll need to chown and chmod some files
after installing the package. This has security implications.
For details, see:
https://sylabs.io/guides/2.6/admin-guide/security.html
https://sylabs.io/guides/3.2/admin-guide/admin_quickstart.html#singularity-security
We've installed a script that will make the necessary changes;
read through it and then execute it as root (e.g. via sudo).
The script is named:
{0}
""".format(self.perm_script_path()))
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