Adding ability for repo paths from a manifest file to be expanded when creating an environment. (#49084)

* Adding ability for repo paths from a manifest file to be expanded when creating an environment.

A unit test was added to check that an environment variable will be expanded.
Also, a bug was fixed in the expansion of develop paths where if an environment variable
was in the path that then produced an absolute path the path would not be extended.

* Fixing new unit test for env repo var substitution

* Adding ability for repo paths from a manifest file to be expanded when creating an environment.

A unit test was added to check that an environment variable will be expanded.
Also, a bug was fixed in the expansion of develop paths where if an environment variable
was in the path that then produced an absolute path the path would not be extended.

* Messed up resolving last rebase

lib/spack/spack/environment/environment.py

@@ -389,6 +389,7 @@ def create_in_dir(
                 # dev paths in this environment to refer to their original
                 # locations.
                 _rewrite_relative_dev_paths_on_relocation(env, init_file_dir)
+                _rewrite_relative_repos_paths_on_relocation(env, init_file_dir)
 
     return env
 
@@ -405,8 +406,8 @@ def _rewrite_relative_dev_paths_on_relocation(env, init_file_dir):
             dev_path = substitute_path_variables(entry["path"])
             expanded_path = spack.util.path.canonicalize_path(dev_path, default_wd=init_file_dir)
 
-            # Skip if the expanded path is the same (e.g. when absolute)
-            if dev_path == expanded_path:
+            # Skip if the substituted and expanded path is the same (e.g. when absolute)
+            if entry["path"] == expanded_path:
                 continue
 
             tty.debug("Expanding develop path for {0} to {1}".format(name, expanded_path))
@@ -421,6 +422,34 @@ def _rewrite_relative_dev_paths_on_relocation(env, init_file_dir):
         env._re_read()
 
 
+def _rewrite_relative_repos_paths_on_relocation(env, init_file_dir):
+    """When initializing the environment from a manifest file and we plan
+    to store the environment in a different directory, we have to rewrite
+    relative repo paths to absolute ones and expand environment variables."""
+    with env:
+        repos_specs = spack.config.get("repos", default={}, scope=env.scope_name)
+        if not repos_specs:
+            return
+        for i, entry in enumerate(repos_specs):
+            repo_path = substitute_path_variables(entry)
+            expanded_path = spack.util.path.canonicalize_path(repo_path, default_wd=init_file_dir)
+
+            # Skip if the substituted and expanded path is the same (e.g. when absolute)
+            if entry == expanded_path:
+                continue
+
+            tty.debug("Expanding repo path for {0} to {1}".format(entry, expanded_path))
+
+            repos_specs[i] = expanded_path
+
+        spack.config.set("repos", repos_specs, scope=env.scope_name)
+
+        env.repos_specs = None
+        # If we changed the environment's spack.yaml scope, that will not be reflected
+        # in the manifest that we read
+        env._re_read()
+
+
 def environment_dir_from_name(name: str, exists_ok: bool = True) -> str:
     """Returns the directory associated with a named environment.
 

lib/spack/spack/test/cmd/repo.py

@@ -5,9 +5,13 @@
 
 import pytest
 
+import spack.config
+import spack.environment as ev
 import spack.main
+from spack.main import SpackCommand
 
 repo = spack.main.SpackCommand("repo")
+env = SpackCommand("env")
 
 
 def test_help_option():
@@ -33,3 +37,33 @@ def test_create_add_list_remove(mutable_config, tmpdir):
     repo("remove", "--scope=site", str(tmpdir))
     output = repo("list", "--scope=site", output=str)
     assert "mockrepo" not in output
+
+
+def test_env_repo_path_vars_substitution(
+    tmpdir, install_mockery, mutable_mock_env_path, monkeypatch
+):
+    """Test Spack correctly substitues repo paths with environment variables when creating an
+    environment from a manifest file."""
+
+    monkeypatch.setenv("CUSTOM_REPO_PATH", ".")
+
+    # setup environment from spack.yaml
+    envdir = tmpdir.mkdir("env")
+    with envdir.as_cwd():
+        with open("spack.yaml", "w", encoding="utf-8") as f:
+            f.write(
+                """\
+spack:
+  specs: []
+
+  repos:
+    - $CUSTOM_REPO_PATH
+"""
+            )
+        # creating env from manifest file
+        env("create", "test", "./spack.yaml")
+        # check that repo path was correctly substituted with the environment variable
+        current_dir = os.getcwd()
+        with ev.read("test") as newenv:
+            repos_specs = spack.config.get("repos", default={}, scope=newenv.scope_name)
+            assert current_dir in repos_specs