write adjacent overwrites existing files

CHANGELOG.md

 ## Unreleased
 
+### Breaking Changes
+
+* `--write adjacent` no longer forbids overwriting existing generated files
+
 ### New Features
 
 * Added support for assignments within expressions (e.g., `x = ++y;`)

src/sv2v.hs

@@ -4,13 +4,11 @@
  - conversion entry point
  -}
 
-import System.Directory (doesFileExist)
 import System.IO (hPrint, hPutStrLn, stderr, stdout)
 import System.Exit (exitFailure, exitSuccess)
 
-import Control.Monad (filterM, when, zipWithM_)
+import Control.Monad (when, zipWithM_)
 import Control.Monad.Except (runExceptT)
-import Data.List (intercalate)
 
 import Convert (convert)
 import Job (readJob, Job(..), Write(..))
@@ -63,11 +61,6 @@ writeOutput (File f) _ asts =
     writeFile f $ show $ concat asts
 writeOutput Adjacent inPaths asts = do
     outPaths <- mapM rewritePath inPaths
-    badPaths <- filterM doesFileExist outPaths
-    when (not $ null badPaths) $ do
-        hPutStrLn stderr $ "Refusing to write output because the following"
-            ++ " files would be overwritten: " ++ intercalate ", " badPaths
-        exitFailure
     let results = map (++ "\n") $ map show asts
     zipWithM_ writeFile outPaths results
 

test/write/run.sh

@@ -45,13 +45,13 @@ test_adjacent() {
 test_adjacent_exist() {
     createArtifacts
     runAndCapture --write=adjacent *.sv
-    clearArtifacts
-
-    assertFalse "adjacent conversion should fail" $result
+    assertTrue "adjacent conversion should overwrite and succeed" $result
     assertNull "stdout should be empty" "$stdout"
-    assertEquals "stderr should list existing files" \
-        "Refusing to write output because the following files would be overwritten: one.v, two.v" \
-        "$stderr"
+    assertNull "stderr should be empty" "$stderr"
+
+    actual=`cat one.v two.v`
+    assertEquals "adjacent output should match combined" "$expected" "$actual"
+    clearArtifacts
 }
 
 test_adjacent_extension() {