Bootstrap clingo from binaries (#22720)

* Bootstrap clingo from binaries

* Move information on clingo binaries to a JSON file

* Add support to bootstrap on Cray

Bootstrapping on Cray requires, at the moment, to
swap the platform when looking for binaries - due
to #22800.

* Add SHA256 verification for bootstrapped software

Use sha256 verification for binaries necessary to bootstrap
the concretizer and gpg for signature verification

* patchelf: use Spec._old_concretize() to bootstrap

As noted in #24450 we may happen to need the
concretizer when bootstrapping clingo. In that case
only the old concretizer is available.

* Add a schema for bootstrapping methods

Two fields have been added to bootstrap.yaml:
  "sources" which lists the methods available for
       bootstrapping software
  "trusted" which records if a source is trusted or not

A subcommand has been added to "spack bootstrap" to list
the sources currently available.

* Methods used for bootstrapping are configurable from bootstrap:sources

The function that tries to ensure a given Python module
is importable now tries bootstrapping methods in the same
order as they are defined in `bootstrap.yaml`

* Permit to trust/untrust bootstrapping methods

* Add binary tests for MacOS, Ubuntu

* Add documentation

* Add a note on bash

1 files changed, 24 insertions, 2 deletions

diff --git a/share/spack/spack-completion.bash b/share/spack/spack-completion.bash
index 03e9770c37..1281ca7349 100755
--- a/share/spack/spack-completion.bash
+++ b/share/spack/spack-completion.bash
@@ -421,7 +421,7 @@ _spack_bootstrap() {
     then
         SPACK_COMPREPLY="-h --help"
     else
-        SPACK_COMPREPLY="enable disable reset root"
+        SPACK_COMPREPLY="enable disable reset root list trust untrust"
     fi
 }
 
@@ -446,6 +446,28 @@ _spack_bootstrap_root() {
     fi
 }
 
+_spack_bootstrap_list() {
+    SPACK_COMPREPLY="-h --help --scope"
+}
+
+_spack_bootstrap_trust() {
+    if $list_options
+    then
+        SPACK_COMPREPLY="-h --help --scope"
+    else
+        SPACK_COMPREPLY=""
+    fi
+}
+
+_spack_bootstrap_untrust() {
+    if $list_options
+    then
+        SPACK_COMPREPLY="-h --help --scope"
+    else
+        SPACK_COMPREPLY=""
+    fi
+}
+
 _spack_build_env() {
     if $list_options
     then
@@ -476,7 +498,7 @@ _spack_buildcache_create() {
 _spack_buildcache_install() {
     if $list_options
     then
-        SPACK_COMPREPLY="-h --help -f --force -m --multiple -a --allow-root -u --unsigned -o --otherarch"
+        SPACK_COMPREPLY="-h --help -f --force -m --multiple -a --allow-root -u --unsigned -o --otherarch --sha256"
     else
         _all_packages
     fi