Fix message filter being put in wrong position by optimizer

Author: vlad-ivanov-name

josh-core/src/filter/opt.rs

@@ -315,6 +315,8 @@ fn common_post(filters: &Vec<Filter>) -> Option<(Filter, Vec<Filter>)> {
             common_post.map(|c| (c, rest))
         } else if let Op::Prefix(_) = to_op(c) {
             common_post.map(|c| (c, rest))
+        } else if let Op::Message(..) = to_op(c) {
+            common_post.map(|c| (c, rest))
         } else {
             None
         }

tests/filter/compose_message.t

@@ -0,0 +1,21 @@
+  $ export TESTTMP=${PWD}
+
+  $ cd ${TESTTMP}
+  $ git init -q repo 1> /dev/null
+  $ cd repo
+
+  $ mkdir -p mono extras
+  $ echo a > mono/a.txt
+  $ echo b > extras/b.txt
+  $ git add .
+  $ git commit -m "initial commit" 1> /dev/null
+
+  $ josh-filter -p ':[:/mono,:/extras]:"REWRITTEN"'
+  :[
+      :/mono
+      :/extras
+  ]:"REWRITTEN"
+
+  $ josh-filter ':[:/mono,:/extras]:"REWRITTEN"' > /dev/null
+  $ git log --pretty=%B -1 FILTERED_HEAD
+  REWRITTEN