# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1660666842 -7200
# Node ID b57c95a0f5f95c381626a955996070507177c6eb
# Parent  cfff73cab721718de9f31ee042a669ec620e2a1c
phase: introduce a dedicated function to check for the archived phase

The internal-phase is "ready to use" since its introduce. However, some
question remains around the `archived` phase. So it seem safer to move them to
separated configuration and requirements. This changeset is a first of a small
series doing this.

diff -r cfff73cab721 -r b57c95a0f5f9 mercurial/phases.py
--- a/mercurial/phases.py	Wed Apr 20 19:24:39 2022 +0200
+++ b/mercurial/phases.py	Tue Aug 16 18:20:42 2022 +0200
@@ -178,6 +178,12 @@
     return requirements.INTERNAL_PHASE_REQUIREMENT in repo.requirements
 
 
+def supportarchived(repo):
+    # type: (localrepo.localrepository) -> bool
+    """True if the archived phase can be used on a repository"""
+    return requirements.INTERNAL_PHASE_REQUIREMENT in repo.requirements
+
+
 def _readroots(repo, phasedefaults=None):
     # type: (localrepo.localrepository, Optional[Phasedefaults]) -> Tuple[Phaseroots, bool]
     """Read phase roots from disk
@@ -642,7 +648,12 @@
         # phaseroots values, replace them.
         if revs is None:
             revs = []
-        if targetphase in (archived, internal) and not supportinternal(repo):
+        if (
+            targetphase == internal
+            and not supportinternal(repo)
+            or targetphase == archived
+            and not supportarchived(repo)
+        ):
             name = phasenames[targetphase]
             msg = b'this repository does not support the %s phase' % name
             raise error.ProgrammingError(msg)
diff -r cfff73cab721 -r b57c95a0f5f9 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Wed Apr 20 19:24:39 2022 +0200
+++ b/mercurial/scmutil.py	Tue Aug 16 18:20:42 2022 +0200
@@ -1191,7 +1191,7 @@
                 obsolete.createmarkers(
                     repo, rels, operation=operation, metadata=metadata
                 )
-        elif phases.supportinternal(repo) and mayusearchived:
+        elif phases.supportarchived(repo) and mayusearchived:
             # this assume we do not have "unstable" nodes above the cleaned ones
             allreplaced = set()
             for ns in replacements.keys():