convert: also catch missing revlogs when introduced in repo roots

The previous behaviour was almost as if convert.hg.ignoreerrors was always set
for revisions without parents, except that errors were silently ignored. Revlog
errors are handled as a side effect of getcopies(), but getcopies() was only
called when convert.hg.ignoreerrors was set.

Now we always call self.getcopies for root revisions, not only when
convert.hg.ignoreerrors is set, just like we do on all other revisions.
The extra call might be a bit expensive, but the proper fix for that would be
to catch these errors in another way.

hgext/convert/hg.py

@@ -287,10 +287,9 b' class mercurial_source(converter_source)'
         parents = self.parents(ctx)
         if not parents:
             files = sorted(ctx.manifest())
-            if self.ignoreerrors:
-                # calling getcopies() is a simple way to detect missing
-                # revlogs and populate self.ignored
-                self.getcopies(ctx, parents, files)
+            # getcopies() is not needed for roots, but it is a simple way to
+            # detect missing revlogs and abort on errors or populate self.ignored
+            self.getcopies(ctx, parents, files)
             return [(f, rev) for f in files if f not in self.ignored], {}
         if self._changescache and self._changescache[0] == rev:
             m, a, r = self._changescache[1]

tests/test-convert-filemap.t

@@ -14,11 +14,13 b''
   $ mkdir -p dir/subdir
   $ echo dir/file >> dir/file
   $ echo dir/file2 >> dir/file2
+  $ echo dir/file3 >> dir/file3 # to be corrupted in rev 0
   $ echo dir/subdir/file3 >> dir/subdir/file3
   $ echo dir/subdir/file4 >> dir/subdir/file4
   $ hg ci -d '0 0' -qAm '0: add foo baz dir/'
   $ echo bar > bar
   $ echo quux > quux
+  $ echo dir/file4 >> dir/file4 # to be corrupted in rev 1
   $ hg copy foo copied
   $ hg ci -d '1 0' -qAm '1: add bar quux; copy foo to copied'
   $ echo >> foo
@@ -63,9 +65,9 b''
   | |
   o |  2 "2: change foo" files: foo
   |/
-  o  1 "1: add bar quux; copy foo to copied" files: bar copied quux
+  o  1 "1: add bar quux; copy foo to copied" files: bar copied dir/file4 quux
   |
-  o  0 "0: add foo baz dir/" files: baz dir/file dir/file2 dir/subdir/file3 dir/subdir/file4 foo
+  o  0 "0: add foo baz dir/" files: baz dir/file dir/file2 dir/file3 dir/subdir/file3 dir/subdir/file4 foo
   
 
 final file versions in this repo:
@@ -76,6 +78,8 b' final file versions in this repo:'
   7711d36246cc83e61fb29cd6d4ef394c63f1ceaf 644   copied
   3e20847584beff41d7cd16136b7331ab3d754be0 644   dir/file
   75e6d3f8328f5f6ace6bf10b98df793416a09dca 644   dir/file2
+  e96dce0bc6a217656a3a410e5e6bec2c4f42bf7c 644   dir/file3
+  6edd55f559cdce67132b12ca09e09cee08b60442 644   dir/file4
   5fe139720576e18e34bcc9f79174db8897c8afe9 644   dir/subdir/file3
   57a1c1511590f3de52874adfa04effe8a77d64af 644   dir/subdir/file4
   9a7b52012991e4873687192c3e17e61ba3e837a3 644   foo
@@ -234,7 +238,14 b' final file versions in this repo:'
   > exclude dir/subdir
   > include dir/subdir/file3
   > EOF
-  $ hg -q convert --filemap renames.fmap --datesort source renames.repo
+  $ rm source/.hg/store/data/dir/file3.i
+  $ rm source/.hg/store/data/dir/file4.i
+  $ hg -q convert --filemap renames.fmap --datesort source dummydest
+  abort: data/dir/file3.i@e96dce0bc6a2: no match found!
+  [255]
+  $ hg -q convert --filemap renames.fmap --datesort --config convert.hg.ignoreerrors=1 source renames.repo
+  ignoring: data/dir/file3.i@e96dce0bc6a2: no match found
+  ignoring: data/dir/file4.i@6edd55f559cd: no match found
   $ hg up -q -R renames.repo
   $ glog -R renames.repo
   @  4 "8: change foo" files: foo2