Remove dependency on posix stuff

Author: olafurpg

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on:  ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [windows-latest, ubuntu-latest]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1

lsif-semanticdb/src/main/java/com/sourcegraph/lsif_semanticdb/LsifWriter.java

@@ -29,11 +29,9 @@ public class LsifWriter implements AutoCloseable {
   private final AtomicInteger id = new AtomicInteger();
 
   public LsifWriter(LsifSemanticdbOptions options) throws IOException {
-    this.tmp =
-        Files.createTempFile(
-            "lsif-semanticdb",
-            "dump.lsif",
-            PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rw-r--r--")));
+    this.tmp = Files.createTempFile("lsif-semanticdb", "dump.lsif");
+    this.tmp.toFile().setReadable(true);
+    this.tmp.toFile().setWritable(true);
     this.output =
         new LsifOutputStream(options, new BufferedOutputStream(Files.newOutputStream(tmp)));
     this.options = options;