Correct path comparisons for fs view (#25891)

* Fix path comparisons in copy views

* Get correct permissions

* Set group id though os

Co-authored-by: Philip Sakievich <psakiev@sanida.gov>

lib/spack/spack/filesystem_view.py

@@ -61,8 +61,8 @@ def view_copy(src, dst, view, spec=None):
 
     Use spec and view to generate relocations
     """
-    shutil.copyfile(src, dst)
-    if spec:
+    shutil.copy2(src, dst)
+    if spec and not spec.external:
         # Not metadata, we have to relocate it
 
         # Get information on where to relocate from/to
@@ -73,14 +73,15 @@ def view_copy(src, dst, view, spec=None):
         # will have the old sbang location in their shebangs.
         # TODO: Not sure which one to use...
         import spack.hooks.sbang as sbang
+
         orig_sbang = '#!/bin/bash {0}/bin/sbang'.format(spack.paths.spack_root)
         new_sbang = sbang.sbang_shebang_line()
 
         prefix_to_projection = OrderedDict({
-            spec.prefix: view.get_projection_for_spec(spec),
-            spack.paths.spack_root: view._root})
+            spec.prefix: view.get_projection_for_spec(spec)})
 
         for dep in spec.traverse():
+            if not dep.external:
                 prefix_to_projection[dep.prefix] = \
                     view.get_projection_for_spec(dep)
 
@@ -96,6 +97,11 @@ def view_copy(src, dst, view, spec=None):
                 files=[dst],
                 prefixes=prefix_to_projection
             )
+        try:
+            stat = os.stat(src)
+            os.chown(dst, stat.st_uid, stat.st_gid)
+        except OSError:
+            tty.debug('Can\'t change the permissions for %s' % dst)
 
 
 def view_func_parser(parsed_name):

lib/spack/spack/relocate.py

@@ -497,6 +497,7 @@ def _replace_prefix_bin(filename, byte_prefixes):
             # We only care about this problem if we are about to replace
             length_compatible = len(new_bytes) <= len(orig_bytes)
             if not length_compatible:
+                tty.debug('Binary failing to relocate is %s' % filename)
                 raise BinaryTextReplaceError(orig_bytes, new_bytes)
             pad_length = len(orig_bytes) - len(new_bytes)
             padding = os.sep * pad_length