diff hgext/uncommit.py @ 42051:f4147ca63d39

uncommit: abort if an explicitly given file cannot be uncommitted (BC)

I've gotten burned several times by this in the last few days.  The former tests
look simple enough, but if a good file and a bad file are given, the bad files
are silently ignored.  Some commands like `forget` will warn about bogus files,
but that would likely get lost in the noise of an interactive uncommit.  The
commit command aborts if a bad file is given, so this seems more consistent for
commands that alter the repository.

--- a/hgext/uncommit.py	Mon Mar 25 12:33:41 2019 +0530
+++ b/hgext/uncommit.py	Fri Mar 29 21:53:15 2019 -0400
@@ -33,6 +33,7 @@
     registrar,
     rewriteutil,
     scmutil,
+    util,
 )
 
 cmdtable = {}
@@ -133,8 +134,34 @@
         if len(old.parents()) > 1:
             raise error.Abort(_("cannot uncommit merge changeset"))
 
+        match = scmutil.match(old, pats, opts)
+
+        # Check all explicitly given files; abort if there's a problem.
+        if match.files():
+            s = old.status(old.p1(), match, listclean=True)
+            eligible = set(s.added) | set(s.modified) | set(s.removed)
+
+            badfiles = set(match.files()) - eligible
+
+            # Naming a parent directory of an eligible file is OK, even
+            # if not everything tracked in that directory can be
+            # uncommitted.
+            if badfiles:
+                badfiles -= set([f for f in util.dirs(eligible)])
+
+            for f in sorted(badfiles):
+                if f in s.clean:
+                    hint = _(b"file was not changed in working directory "
+                             b"parent")
+                elif repo.wvfs.exists(f):
+                    hint = _(b"file was untracked in working directory parent")
+                else:
+                    hint = _(b"file does not exist")
+
+                raise error.Abort(_(b'cannot uncommit "%s"')
+                                  % scmutil.getuipathfn(repo)(f), hint=hint)
+
         with repo.transaction('uncommit'):
-            match = scmutil.match(old, pats, opts)
             keepcommit = pats
             if not keepcommit:
                 if opts.get('keep') is not None: