largefiles: make archive -S store largefiles instead of standins

This is essentially a copy of largefile's override of archive() in the
archival class, adapted for overriding hgsubrepo's archive().  That
means decoding isn't taken into consideration, nor is .hg_archival.txt
generated (the same goes for regular subrepos).  Unlike subrepos, but
consistent with largefile's handling of the top repo, ui.progress() is
*not* called.  This should probably be refactored at some point, but
at least this generates the archives properly for now.  Previously,
the standins were ignored and the largefiles were archived only for
the top level repo.

Long term, it would probably be most desirable to figure out how to
tweak archival's archive() if necessary such that largefiles doesn't
need to override it completely just to special case the translating of
standins to the real files.  Largefiles will already return a context
with the true largefiles instead of the standins if lfilesrepo's
lfstatus is True- perhaps this can be leveraged?

hgext/largefiles/overrides.py

@@ -781,6 +781,47 b' def overridearchive(orig, repo, dest, no'
 
     archiver.done()
 
+def hgsubrepoarchive(orig, repo, ui, archiver, prefix):
+    rev = repo._state[1]
+    ctx = repo._repo[rev]
+
+    lfcommands.cachelfiles(ui, repo._repo, ctx.node())
+
+    def write(name, mode, islink, getdata):
+        if lfutil.isstandin(name):
+            return
+        data = getdata()
+
+        archiver.addfile(prefix + repo._path + '/' + name, mode, islink, data)
+
+    for f in ctx:
+        ff = ctx.flags(f)
+        getdata = ctx[f].data
+        if lfutil.isstandin(f):
+            path = lfutil.findfile(repo._repo, getdata().strip())
+            if path is None:
+                raise util.Abort(
+                    _('largefile %s not found in repo store or system cache')
+                    % lfutil.splitstandin(f))
+            f = lfutil.splitstandin(f)
+
+            def getdatafn():
+                fd = None
+                try:
+                    fd = open(os.path.join(prefix, path), 'rb')
+                    return fd.read()
+                finally:
+                    if fd:
+                        fd.close()
+
+            getdata = getdatafn
+
+        write(f, 'x' in ff and 0755 or 0644, 'l' in ff, getdata)
+
+    for subpath in ctx.substate:
+        sub = ctx.sub(subpath)
+        sub.archive(repo.ui, archiver, prefix)
+
 # If a largefile is modified, the change is not reflected in its
 # standin until a commit. cmdutil.bailifchanged() raises an exception
 # if the repo has uncommitted changes. Wrap it to also check if

hgext/largefiles/uisetup.py

@@ -100,6 +100,7 b' def uisetup(ui):'
     extensions.wrapfunction(hg, 'merge', overrides.hgmerge)
 
     extensions.wrapfunction(archival, 'archive', overrides.overridearchive)
+    extensions.wrapfunction(hgsubrepo, 'archive', overrides.hgsubrepoarchive)
     extensions.wrapfunction(cmdutil, 'bailifchanged',
                             overrides.overridebailifchanged)
 

tests/test-largefiles.t

@@ -1096,4 +1096,34 b' verify that large files in subrepos hand'
   abort: uncommitted changes in subrepo subrepo
   (use --subrepos for recursive commit)
   [255]
+
+# Add a normal file to the subrepo, then test archiving
+  $ echo 'normal file' > subrepo/normal.txt
+  $ hg -R subrepo add subrepo/normal.txt
+# Lock in subrepo, otherwise the change isn't archived
+  $ hg ci -S -m "add normal file to top level"
+  committing subrepository subrepo
+  Invoking status precommit hook
+  M large.txt
+  A normal.txt
+  Invoking status precommit hook
+  M .hgsubstate
+  $ hg archive -S lf_subrepo_archive
+  $ find lf_subrepo_archive -print
+  lf_subrepo_archive
+  lf_subrepo_archive/.hg_archival.txt
+  lf_subrepo_archive/.hgsubstate
+  lf_subrepo_archive/subrepo
+  lf_subrepo_archive/subrepo/large.txt
+  lf_subrepo_archive/subrepo/normal.txt
+  lf_subrepo_archive/a
+  lf_subrepo_archive/a/b
+  lf_subrepo_archive/a/b/c
+  lf_subrepo_archive/a/b/c/d
+  lf_subrepo_archive/a/b/c/d/e.normal.txt
+  lf_subrepo_archive/a/b/c/d/e.large.txt
+  lf_subrepo_archive/a/b/c/x
+  lf_subrepo_archive/a/b/c/x/y.normal.txt
+  lf_subrepo_archive/.hgsub
+
   $ cd ..