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Scans for patch files (default `./patches` directory) when processing config files - Normalizes the path, then performs conversion: content rewrite + filename rewrite - Aggregates results into `patchedDependencies` entries, writes them back to config - Runs `pnpm install` automatically via workflow step to apply the patches ### Content Conversion - **Detection**: converts only if patch content includes node_modules diff headers (`diff --git a/node_modules/...`, `-- a/node_modules/...`, `+++ b/node_modules/...`) - **Prefix calculation**: derives a removal pattern from the patch filename by taking all `+`separated parts except the last (version), joining with `/`, and prefixing with node_modules - **Rewrite**: globally removes that prefix from the patch content to meet pnpm's expected format ### Filename Conversion - **Input naming (patch-package)**: `+.patch` - **Output naming (pnpm)**: `@.patch` - **Example**: `@scope+pkg+1.2.3.patch` → `@scope__pkg@1.2.3.patch` ## Batch vs Single-File Processing - **Directory mode**: enumerates all `.patch` files, then converts each (content + filename) - **Single-file mode**: validates existence, `.patch` extension, presence of `+` in name, and ensures the target converted file doesn't already exist; then converts - If a patch doesn't need conversion (no node_modules headers), it's skipped ## Configuration Updates ### Patched Dependencies For each converted file: - **Key**: filename without `.patch`, replace `__` back to `/`, e.g. `/_{/...@`
- **Value**: `/` where `patchesDir` is the directory name containing the patches (e.g., `patches`)
- Merges these into existing `patchedDependencies`, overwriting duplicate keys

### Config Files

- **Prefers pnpm-workspace.yaml**: reads top-level `patchedDependencies`, merges new entries, and writes back
- **Fallback to package.json**: updates `pnpm.patchedDependencies` in place if workspace file is absent
- **Merge strategy**: additive with overwrite, preserving unrelated fields

## Examples

### Before (patch-package)

File: `patches/@react-spring+core+9.4.5.patch`

```diff
diff --git a/node_modules/@react-spring/core/src/index.ts b/node_modules/@react-spring/core/src/index.ts
index 1234567..abcdefg 100644
--- a/node_modules/@react-spring/core/src/index.ts
+++ b/node_modules/@react-spring/core/src/index.ts
@@ -1,3 +1,3 @@
-export const version = '9.4.5'
+export const version = '9.4.5-patched'

```

### After (pnpm)

File: `patches/@react-spring__core@9.4.5.patch`

```diff
diff --git a/src/index.ts b/src/index.ts
index 1234567..abcdefg 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,3 @@
-export const version = '9.4.5'
+export const version = '9.4.5-patched'

```

Configuration in `pnpm-workspace.yaml`:

```yaml
patchedDependencies:
'@react-spring/core@9.4.5': patches/@react-spring__core@9.4.5.patch

```

## Error Handling

- **Directory mode**: errors on non-existent path or non-directory
- **Single-file mode**: blocks if the converted target file already exists (to avoid overwrite)
- **Requires filenames containing `+` and ending with `.patch`**; otherwise errors
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