patch: fix iterhunks() with trailing binary file removal

Like some renames or copy operations, binary file removal does not generate any
"file" or "hunk" action, but was not tagged as such and let iterhunk() assume
no hunk was applied for the deleted file.

mercurial/patch.py

@@ -890,6 +890,9 b' def iterhunks(ui, fp, sourcefile=None):'
     context = None
     lr = linereader(fp)
     dopatch = True
+    # gitworkdone is True if a git operation (copy, rename, ...) was
+    # performed already for the current file. Useful when the file
+    # section may have no hunk.
     gitworkdone = False
 
     while True:
@@ -938,8 +941,8 b' def iterhunks(ui, fp, sourcefile=None):'
                         changed[gp.path] = (gp.op, gp)
                 # else error?
                 # copy/rename + modify should modify target, not source
-                if changed.get(bfile[2:], (None, None))[0] in ('COPY',
-                                                               'RENAME'):
+                gitop = changed.get(bfile[2:], (None, None))[0]
+                if gitop in ('COPY', 'DELETE', 'RENAME'):
                     afile = bfile
                     gitworkdone = True
             newfile = True

tests/test-import

@@ -207,3 +207,21 b' do'
 done
 cd ..
 
+# Test importing a patch ending with a binary file removal
+echo % test trailing binary removal
+hg init binaryremoval
+cd binaryremoval
+echo a > a
+python -c "file('b', 'wb').write('a\x00b')"
+hg ci -Am addall
+hg rm a
+hg rm b
+hg st
+hg ci -m remove
+hg export --git . > remove.diff
+cat remove.diff | grep git
+hg up -C 0
+hg import remove.diff
+hg manifest
+cd ..
+

tests/test-import.out

@@ -223,3 +223,12 b' c'
 % c2 file
 c
 % d file
+% test trailing binary removal
+adding a
+adding b
+R a
+R b
+diff --git a/a b/a
+diff --git a/b b/b
+2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+applying remove.diff