phabricator: add addremoved and addmodified functions

These are relatively simple so add them together.  As the name indicates, these
add phabchange objects for removed and modified files to the phabdiff.

Differential Revision: https://phab.mercurial-scm.org/D7049

hgext/phabricator.py

@@ -684,6 +684,44 b' def makebinary(pchange, fctx):'
             pchange.fileType = DiffFileType.IMAGE
 
 
+# Copied from mercurial/patch.py
+gitmode = {b'l': b'120000', b'x': b'100755', b'': b'100644'}
+
+
+def addremoved(pdiff, ctx, removed):
+    """add removed files to the phabdiff. Shouldn't include moves"""
+    for fname in removed:
+        pchange = phabchange(
+            currentPath=fname, oldPath=fname, type=DiffChangeType.DELETE
+        )
+        pchange.addoldmode(gitmode[ctx.p1()[fname].flags()])
+        fctx = ctx.p1()[fname]
+        if not fctx.isbinary():
+            maketext(pchange, ctx, fname)
+
+        pdiff.addchange(pchange)
+
+
+def addmodified(pdiff, ctx, modified):
+    """add modified files to the phabdiff"""
+    for fname in modified:
+        fctx = ctx[fname]
+        pchange = phabchange(currentPath=fname, oldPath=fname)
+        filemode = gitmode[ctx[fname].flags()]
+        originalmode = gitmode[ctx.p1()[fname].flags()]
+        if filemode != originalmode:
+            pchange.addoldmode(originalmode)
+            pchange.addnewmode(filemode)
+
+        if fctx.isbinary():
+            makebinary(pchange, fctx)
+            addoldbinary(pchange, fctx, fname)
+        else:
+            maketext(pchange, ctx, fname)
+
+        pdiff.addchange(pchange)
+
+
 def creatediff(ctx):
     """create a Differential Diff"""
     repo = ctx.repo()