feat: add option to skip file replacement

resolves #20

README.md

@@ -53,6 +53,10 @@ You need more? Let me know by [opening an issue here](https://github.com/adrianj
 
 Will omit all delete operations for matching files present in `TARGET_REPO` but not existant in `SRC_REPO` if set to `true`. Defaults to `false`.
 
+### `SKIP_REPLACE`
+
+Will omit all write operations for matching files present in `SRC_REPO` and `TARGET_REPO` if set to `true`. Defaults to `false`.
+
 ### `TEMP_DIR`
 
 The working directory where all sync operations will be done. Defaults to `tmp-${Date.now().toString()}`

action.yml

@@ -32,6 +32,10 @@ inputs:
     description: |
       Will omit all delete operations for matching files present in `TARGET_REPO` but not existant in `SRC_REPO` if set to `true`. Defaults to `false`.
     required: false
+  SKIP_REPLACE:
+    description: |
+      Will omit all write operations for matching files present in `SRC_REPO` and `TARGET_REPO` if set to `true`. Defaults to `false`.
+    required: false
   SKIP_CLEANUP:
     description: |
       If set to true or 1, the cleanup step to remove the temporary workding directory at the end will be skipped. Usefull for debugging purposes.

src/context.js

@@ -34,6 +34,9 @@ const context = {
 	SKIP_DELETE: ["1", "true"].includes(
 		core.getInput("SKIP_DELETE", { required: false }).toLowerCase()
 	),
+	SKIP_REPLACE: ["1", "true"].includes(
+		core.getInput("SKIP_REPLACE", { required: false }).toLowerCase()
+	),
 	SRC_REPO:
 		core.getInput("SRC_REPO", { required: false }) ||
 		process.env.GITHUB_REPOSITORY,

src/utils.js

@@ -8,6 +8,7 @@ const {
 	FILE_PATTERNS,
 	DRY_RUN,
 	SKIP_DELETE,
+	SKIP_REPLACE,
 	SRC_REPO,
 	SRC_ROOT,
 	TARGET_ROOT,
@@ -64,7 +65,20 @@ const init = (repoFullname) => {
 	};
 
 	const copyFile = async (from, to) => {
-		// TODO [#20]: add option to skip replacement of files
+		const targetExists = await fs
+			.access(to)
+			.then(() => true)
+			.catch(() => false);
+		if (SKIP_REPLACE && targetExists) {
+			logger.info(
+				"skip copying",
+				from.replace(/\\/g, "/").replace(/^\//, ""),
+				"to",
+				to.replace(/\\/g, "/").replace(/^\//, ""),
+				"because SKIP_REPLACE = true"
+			);
+			return;
+		}
 		logger.info(
 			"copy",
 			from.replace(/\\/g, "/").replace(/^\//, ""),