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Installing your Spack environment

As in the previous example, we need to spec and then install our environment.

Spack find

Let's look at the output of spack find in the activated environment:

spack find output
[spack-python] $ spack find -x -p
==> In environment /data/scratch/abc123/spack-environments/spack-python
==> 3 root specs
 -  libsndfile   -  py-pip   -  python@3.12

==> 0 installed packages

So, in the context of the environment, the "root specs" are listed but not yet installed ("==> 0 installed packages").

Speccing the environment

Always run a spec command before install!

You should always check what is about to be installed using the spec command as detailed below and then move onto the install command.

Let's run a spec command in the activated environment:

spack spec output (click to expand)
[spack-python] $ spack spec
 -   libsndfile@1.2.2%gcc@12.2.0~alsa~external-libs~sqlite build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^gcc-runtime@12.2.0%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[e]      ^glibc@2.34%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^gmake@4.4.1%gcc@11.4.1~guile build_system=generic arch=linux-rocky9-x86_64_v4
[^]          ^gcc-runtime@11.4.1%gcc@11.4.1 build_system=generic arch=linux-rocky9-x86_64_v4
[^]      ^pkgconf@2.2.0%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  py-pip@23.1.2%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[e]      ^glibc@2.34%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^python-venv@1.0%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[^]  python@3.12.1%gcc@12.2.0+bz2+crypt+ctypes+dbm~debug+libxml2+lzma~nis~optimizations+pic+pyexpat+pythoncmd+readline+shared+sqlite3+ssl~tkinter+uuid+zlib build_system=generic arch=linux-rocky9-x86_64_v4
[^]      ^bzip2@1.0.8%gcc@11.4.1~debug~pic+shared build_system=generic arch=linux-rocky9-x86_64_v4
[^]          ^diffutils@3.10%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^expat@2.6.2%gcc@12.2.0+libbsd build_system=autotools arch=linux-rocky9-x86_64_v4
[^]          ^libbsd@0.12.1%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]              ^libmd@1.0.4%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^gdbm@1.23%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^gettext@0.22.5%gcc@11.4.1+bzip2+curses+git~libunistring+libxml2+pic+shared+tar+xz build_system=autotools arch=linux-rocky9-x86_64_v4
[^]          ^libxml2@2.10.3%gcc@11.4.1+pic~python+shared build_system=autotools arch=linux-rocky9-x86_64_v4
[^]          ^tar@1.34%gcc@11.4.1 build_system=autotools zip=pigz arch=linux-rocky9-x86_64_v4
[^]              ^pigz@2.8%gcc@11.4.1 build_system=makefile arch=linux-rocky9-x86_64_v4
[^]              ^zstd@1.5.6%gcc@11.4.1+programs build_system=makefile compression=none libs=shared,static arch=linux-rocky9-x86_64_v4
[^]      ^libffi@3.4.6%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^libxcrypt@4.4.35%gcc@12.2.0~obsolete_api build_system=autotools patches=4885da3 arch=linux-rocky9-x86_64_v4
[^]          ^perl@5.38.0%gcc@11.4.1+cpanm+opcode+open+shared+threads build_system=generic patches=714e4d1 arch=linux-rocky9-x86_64_v4
[^]              ^berkeley-db@18.1.40%gcc@11.4.1+cxx~docs+stl build_system=autotools patches=26090f4,b231fcc arch=linux-rocky9-x86_64_v4
[^]      ^ncurses@6.5%gcc@11.4.1~symlinks+termlib abi=none build_system=autotools patches=7a351bc arch=linux-rocky9-x86_64_v4
[^]      ^openssl@3.3.0%gcc@12.2.0~docs+shared build_system=generic certs=mozilla arch=linux-rocky9-x86_64_v4
[^]          ^ca-certificates-mozilla@2023-05-30%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[^]      ^readline@8.2%gcc@11.4.1 build_system=autotools patches=bbf97f1 arch=linux-rocky9-x86_64_v4
[^]      ^sqlite@3.43.2%gcc@12.2.0+column_metadata+dynamic_extensions+fts~functions+rtree build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^util-linux-uuid@2.38.1%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]      ^xz@5.4.6%gcc@11.4.1~pic build_system=autotools libs=shared,static arch=linux-rocky9-x86_64_v4
[^]      ^zlib-ng@2.1.6%gcc@11.4.1+compat+new_strategies+opt+pic+shared build_system=autotools arch=linux-rocky9-x86_64_v4

This time everything is already in upstream ([^]) apart from libsndfile, which in the output above is marked with - meaning that it is missing and needs to be installed personally.

Installing the environment

Once you are happy with the output of the spack spec command above, you can move onto a spack install command. Remember, you should add -j $NSLOTS to your command to ensure that you match the installation process threading to your qlogin core request:

spack install output (click to expand)
[spack-python] $ spack install -j $NSLOTS
==> Concretized 3 specs
 -   ls6bwub  libsndfile@1.2.2%gcc@12.2.0~alsa~external-libs~sqlite build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  w77gg5r      ^gcc-runtime@12.2.0%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[e]  q2367ne      ^glibc@2.34%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  xchit5a      ^gmake@4.4.1%gcc@11.4.1~guile build_system=generic arch=linux-rocky9-x86_64_v4
[^]  llid4hw          ^gcc-runtime@11.4.1%gcc@11.4.1 build_system=generic arch=linux-rocky9-x86_64_v4
[^]  7wg26bz      ^pkgconf@2.2.0%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  inullmb  py-pip@23.1.2%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[e]  xri56vc      ^glibc@2.34%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  fcsyl32      ^python-venv@1.0%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[^]  sd2mpei  python@3.12.1%gcc@12.2.0+bz2+crypt+ctypes+dbm~debug+libxml2+lzma~nis~optimizations+pic+pyexpat+pythoncmd+readline+shared+sqlite3+ssl~tkinter+uuid+zlib build_system=generic arch=linux-rocky9-x86_64_v4
[^]  uj4wyhx      ^bzip2@1.0.8%gcc@11.4.1~debug~pic+shared build_system=generic arch=linux-rocky9-x86_64_v4
[^]  7zermel          ^diffutils@3.10%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  je4ggnn      ^expat@2.6.2%gcc@12.2.0+libbsd build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  zb23l3j          ^libbsd@0.12.1%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  y6ppafl              ^libmd@1.0.4%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  bx77xc6      ^gdbm@1.23%gcc@11.4.1 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  udcuonu      ^gettext@0.22.5%gcc@11.4.1+bzip2+curses+git~libunistring+libxml2+pic+shared+tar+xz build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  q6zmsq6          ^libxml2@2.10.3%gcc@11.4.1+pic~python+shared build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  ivzmnos          ^tar@1.34%gcc@11.4.1 build_system=autotools zip=pigz arch=linux-rocky9-x86_64_v4
[^]  somkvv4              ^pigz@2.8%gcc@11.4.1 build_system=makefile arch=linux-rocky9-x86_64_v4
[^]  my7tyw6              ^zstd@1.5.6%gcc@11.4.1+programs build_system=makefile compression=none libs=shared,static arch=linux-rocky9-x86_64_v4
[^]  yc4oqfz      ^libffi@3.4.6%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  4mszlpj      ^libxcrypt@4.4.35%gcc@12.2.0~obsolete_api build_system=autotools patches=4885da3 arch=linux-rocky9-x86_64_v4
[^]  eyk53wh          ^perl@5.38.0%gcc@11.4.1+cpanm+opcode+open+shared+threads build_system=generic patches=714e4d1 arch=linux-rocky9-x86_64_v4
[^]  cogxxtx              ^berkeley-db@18.1.40%gcc@11.4.1+cxx~docs+stl build_system=autotools patches=26090f4,b231fcc arch=linux-rocky9-x86_64_v4
[^]  4n2uzha      ^ncurses@6.5%gcc@11.4.1~symlinks+termlib abi=none build_system=autotools patches=7a351bc arch=linux-rocky9-x86_64_v4
[^]  filwsx6      ^openssl@3.3.0%gcc@12.2.0~docs+shared build_system=generic certs=mozilla arch=linux-rocky9-x86_64_v4
[^]  muc5zmk          ^ca-certificates-mozilla@2023-05-30%gcc@12.2.0 build_system=generic arch=linux-rocky9-x86_64_v4
[^]  ea7drzj      ^readline@8.2%gcc@11.4.1 build_system=autotools patches=bbf97f1 arch=linux-rocky9-x86_64_v4
[^]  t5xgpdh      ^sqlite@3.43.2%gcc@12.2.0+column_metadata+dynamic_extensions+fts~functions+rtree build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  nkfrifq      ^util-linux-uuid@2.38.1%gcc@12.2.0 build_system=autotools arch=linux-rocky9-x86_64_v4
[^]  rwn7pno      ^xz@5.4.6%gcc@11.4.1~pic build_system=autotools libs=shared,static arch=linux-rocky9-x86_64_v4
[^]  g2yruc3      ^zlib-ng@2.1.6%gcc@11.4.1+compat+new_strategies+opt+pic+shared build_system=autotools arch=linux-rocky9-x86_64_v4

[+] /usr (external glibc-2.34-xri56vcyzs7kkvakhoku3fefc46nw25y)
[+] /usr (external glibc-2.34-q2367nemoxqj6j3fg54cg4mjlkvc7f5n)
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/gcc-runtime/11.4.1-llid4hw
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/gcc-runtime/12.2.0-w77gg5r
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/xz/5.4.6-rwn7pno
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/zstd/1.5.6-my7tyw6
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/ncurses/6.5-4n2uzha
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/pkgconf/2.2.0-7wg26bz
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/gmake/4.4.1-xchit5a
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/zlib-ng/2.1.6-g2yruc3
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/bzip2/1.0.8-uj4wyhx
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/libxcrypt/4.4.35-4mszlpj
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/libmd/1.0.4-y6ppafl
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/libffi/3.4.6-yc4oqfz
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/util-linux-uuid/2.38.1-nkfrifq
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/readline/8.2-ea7drzj
==> Installing libsndfile-1.2.2-ls6bwubs4onvwu3wk5xps47p4r5t3l5q [17/29]
==> No binary for libsndfile-1.2.2-ls6bwubs4onvwu3wk5xps47p4r5t3l5q found: installing from source
==> Fetching https://mirror.spack.io/_source-cache/archive/37/3799ca9924d3125038880367bf1468e53a1b7e3686a934f098b7e1d286cdb80e.tar.xz
==> No patches needed for libsndfile
==> libsndfile: Executing phase: 'autoreconf'
==> libsndfile: Executing phase: 'configure'
==> libsndfile: Executing phase: 'build'
==> libsndfile: Executing phase: 'install'
==> libsndfile: Successfully installed libsndfile-1.2.2-ls6bwubs4onvwu3wk5xps47p4r5t3l5q
  Stage: 0.17s.  Autoreconf: 0.00s.  Configure: 22.36s.  Build: 5.59s.  Install: 0.75s.  Post-install: 0.11s.  Total: 29.26s
[+] /data/scratch/abc123/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/libsndfile/1.2.2-ls6bwub
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/libxml2/2.10.3-q6zmsq6
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/pigz/2.8-somkvv4
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/openssl/3.3.0-filwsx6
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/libbsd/0.12.1-zb23l3j
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/gdbm/1.23-bx77xc6
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/sqlite/3.43.2-t5xgpdh
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/tar/1.34-ivzmnos
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/expat/2.6.2-je4ggnn
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-11.4.1/gettext/0.22.5-udcuonu
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/python/3.12.1-sd2mpei
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/python-venv/1.0-fcsyl32
[+] /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/py-pip/23.1.2-inullmb
==> Updating view at /data/scratch/abc123/spack-environments/spack-python/.spack-env/view

Spack has concretized the environment specs and then used upstream or existing personal installs for everything except libsndfile, which it has installed into the install_tree: root: we defined in the config: section of our spack.yaml file.

If we now run our find command again, we see the "root specs" are now installed. Also listed as "installed" are any required dependencies that have been taken from our upstream:

spack find output
[spack-python] $ spack find -x -p
==> In environment /data/scratch/abc123/spack-environments/spack-python
==> 3 root specs
[+] libsndfile  [^] py-pip  [^] python@3.12

-- linux-rocky9-x86_64_v4 / gcc@12.2.0 --------------------------
libsndfile@1.2.2  /data/scratch/abc123/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/libsndfile/1.2.2-ls6bwub
openssl@3.3.0     /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/openssl/3.3.0-filwsx6
python@3.12.1     /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/python/3.12.1-sd2mpei
sqlite@3.43.2     /share/apps/rocky9/spack/apps/linux-rocky9-x86_64_v4/gcc-12.2.0/sqlite/3.43.2-t5xgpdh
==> 4 installed packages
==> 0 concretized packages to be installed (show with `spack find -c`)