wip

README.1.md

@@ -0,0 +1 @@
+updateTabs();

core/src/main/kotlin/com/simiacryptus/cognotik/diff/FuzzyPatchMatcher.kt

@@ -376,7 +376,7 @@ open class FuzzyPatchMatcher(
      * @return The normalized string.
      */
     open fun normalizeLine(line: String): String {
-        return line.trimEnd().replace("\\s{2,}".toRegex(), " ")
+        return line.trim().replace("\\s{2,}".toRegex(), " ")
     }
 
     /**
@@ -487,7 +487,8 @@ open class FuzzyPatchMatcher(
         }
         // Only add unmatched ADD lines if we had at least some context match
         // Otherwise, the patch likely doesn't apply to this file
-        if (lastMatchedPatchIndex >= 0) {
+        val isSourceEmpty = sourceLines.isEmpty() || (sourceLines.size == 1 && sourceLines[0].line.isNullOrEmpty())
+        if (lastMatchedPatchIndex >= 0 || isSourceEmpty) {
             patchLines.filter { it.type == ADD && !usedPatchLines.contains(it) }.forEach { line ->
                 log.debug("Added patch line: {}", line)
                 patchedText.add(line.line ?: "")
@@ -785,14 +786,17 @@ open class FuzzyPatchMatcher(
             val trimmedLine = line.trimStart()
             val content = when {
                 line.startsWith("  ") -> line.substring(2)
+                line.startsWith(" ") -> line.substring(1)
                 trimmedLine.startsWith("+") || trimmedLine.startsWith("-") -> trimmedLine
                 else -> line
             }
 
-            LineRecord(
+LineRecord(
                 index = index, line = run {
                     when {
                         content.startsWith("+++") || content.startsWith("---") || content.startsWith("@@") -> null
+                        content.startsWith("+ ") && !content.startsWith("+  ") -> content.substring(2)
+                        content.startsWith("- ") && !content.startsWith("-  ") -> content.substring(2)
                         content.startsWith("+") -> content.substring(1)
                         content.startsWith("-") -> content.substring(1)
                         else -> content

core/src/test/kotlin/com/simiacryptus/diff/FuzzyPatchMatcherTest.kt

@@ -12,13 +12,15 @@ class FuzzyPatchMatcherTest {
         fun testCases() = listOf(
             "/patch_exact_match.json",
             "/patch_add_line.json",
+            "/patch_append_line.json",
+            "/patch_prepend_line.json",
             "/patch_modify_line.json",
+            "/yaml_min_repro.json",
             "/patch_remove_line.json",
-//            "/patch_add_2_lines_variant_2.json",
-//            "/patch_add_2_lines_variant_3.json",
-            "/patch_from_data_1.json",
-            "/patch_from_data_2.json",
-            "/yaml_1.json"
+            "/patch_add_2_lines_variant_2.json",
+            "/patch_add_2_lines_variant_3.json",
+            "/patch_inner_block.json",
+            "/patch_append_to_empty_file.json",
         )
     }
 

core/src/test/kotlin/com/simiacryptus/diff/PatchTestCase.kt

@@ -13,19 +13,14 @@ data class PatchTestCase(
     val errors: String?
 ) {
     companion object {
-
         fun test(resourceName: String, patcher: PatchProcessor) {
             fun normalize(text: String) = text.trim().replace("\r\n", "\n")
             val stream = patcher.javaClass.getResourceAsStream(resourceName)
                 ?: throw IllegalArgumentException("Resource not found: $resourceName")
             val testCase: PatchTestCase = JsonUtil.fromJson(String(stream.readAllBytes()), PatchTestCase::class.java)
-            if (!testCase.isValid) {
-                // Skip invalid test cases
-                return
-            }
+            if (!testCase.isValid) return
             val result = patcher.applyPatch(testCase.originalCode, testCase.diff)
             Assertions.assertEquals(normalize(testCase.newCode), normalize(result))
         }
-
     }
 }

core/src/test/resources/patch_append_line.json

@@ -0,0 +1,8 @@
+{
+  "filename": "test_append_line.txt",
+  "originalCode": "line1\nline2\nline3",
+  "diff": "line1\nline2\nline3\n+newLine",
+  "newCode": "line1\nline2\nline3\nnewLine",
+  "isValid": true,
+  "errors": ""
+}

core/src/test/resources/patch_append_to_empty_file.json

@@ -0,0 +1,8 @@
+{
+  "filename": "test_append_to_empty.txt",
+  "originalCode": "",
+  "diff": "+newLine",
+  "newCode": "newLine",
+  "isValid": true,
+  "errors": ""
+}

core/src/test/resources/patch_inner_block.json

@@ -0,0 +1,8 @@
+{
+  "filename": "test_minimized.js",
+  "originalCode": "function foo() {\n    var x = 1;\n}",
+  "diff": "var x = 1;\n+    var y = 2;\n}",
+  "newCode": "function foo() {\n    var x = 1;\n    var y = 2;\n}",
+  "isValid": true,
+  "errors": ""
+}

core/src/test/resources/patch_prepend_line.json

@@ -0,0 +1,8 @@
+{
+  "filename": "test_prepend_line.txt",
+  "originalCode": "line1\nline2\nline3",
+  "diff": "+newLine\nline1\nline2\nline3",
+  "newCode": "newLine\nline1\nline2\nline3",
+  "isValid": true,
+  "errors": ""
+}