From ac68449b2783886ab0df792b16257a788017ec8d Mon Sep 17 00:00:00 2001
From: Anton Vikulov <rndnm@yandex-team.ru>
Date: Fri, 4 Sep 2026 14:04:43 +0300
Subject: [PATCH] fix(s3-upload): revert path normalization

---
 src/common/s3-upload/upload.test.ts | 31 -----------------------------
 src/common/s3-upload/upload.ts      | 31 +++++------------------------
 2 files changed, 5 insertions(+), 57 deletions(-)

diff --git a/src/common/s3-upload/upload.test.ts b/src/common/s3-upload/upload.test.ts
index 56eb6d4..9abda53 100644
--- a/src/common/s3-upload/upload.test.ts
+++ b/src/common/s3-upload/upload.test.ts
@@ -97,37 +97,6 @@ describe('uploadFiles', () => {
         expect(uploadFile).toHaveBeenCalledTimes(1);
     });
 
-    it('builds an S3 key from the target prefix and a relative file path', async () => {
-        headObject.mockRejectedValueOnce({name: 'NotFound'});
-
-        await uploadFiles(['/build/assets/file.txt'], {
-            ...createConfig(),
-            options: {
-                ...createConfig().options,
-                targetPath: 'releases/current',
-            },
-        });
-
-        expect(headObject).toHaveBeenCalledWith('bucket', 'releases/current/assets/file.txt');
-        expect(uploadFile).toHaveBeenCalledWith(
-            'bucket',
-            '/build/assets/file.txt',
-            'releases/current/assets/file.txt',
-            {cacheControl: undefined},
-        );
-    });
-
-    it.each(['../outside.txt', '/outside.txt'])(
-        'rejects a file outside of sourcePath: %s',
-        async (filePath) => {
-            await expect(uploadFiles([filePath], createConfig())).rejects.toThrow(
-                `File ${filePath} is outside of source path /build`,
-            );
-            expect(headObject).not.toHaveBeenCalled();
-            expect(uploadFile).not.toHaveBeenCalled();
-        },
-    );
-
     it.each([
         ['file.js.gz', 'gzip'],
         ['file.js.br', 'br'],
diff --git a/src/common/s3-upload/upload.ts b/src/common/s3-upload/upload.ts
index 13e4b54..fd4e47e 100644
--- a/src/common/s3-upload/upload.ts
+++ b/src/common/s3-upload/upload.ts
@@ -38,7 +38,9 @@ export async function uploadFiles(files: string[], config: UploadFilesOptions) {
 
     return Promise.all(
         files.flatMap((filePath) => {
-            const relativeFilePath = getRelativeFilePath(config.options.sourcePath, filePath);
+            const relativeFilePath = path.isAbsolute(filePath)
+                ? path.relative(config.options.sourcePath, filePath)
+                : filePath;
             return processFile(relativeFilePath);
         }),
     );
@@ -69,11 +71,8 @@ export async function uploadFiles(files: string[], config: UploadFilesOptions) {
 
     function fileUploader(options: UploadOptions) {
         return async (relativeFilePath: string) => {
-            const sourceFilePath = path.resolve(options.sourcePath, relativeFilePath);
-            const targetFilePath = path.posix.join(
-                toPosixPath(options.targetPath ?? ''),
-                toPosixPath(relativeFilePath),
-            );
+            const sourceFilePath = path.join(options.sourcePath, relativeFilePath);
+            const targetFilePath = path.join(options.targetPath || '', relativeFilePath);
 
             log.verbose(`Uploading file ${relativeFilePath} ...`);
             const existsBehavior = options.existsBehavior ?? 'ignore';
@@ -156,26 +155,6 @@ export async function uploadFiles(files: string[], config: UploadFilesOptions) {
 
 const NOT_COMPRESS = ['png', 'zip', 'gz', 'br'];
 
-function getRelativeFilePath(sourcePath: string, filePath: string) {
-    const absoluteSourcePath = path.resolve(sourcePath);
-    const absoluteFilePath = path.resolve(absoluteSourcePath, filePath);
-    const relativeFilePath = path.relative(absoluteSourcePath, absoluteFilePath);
-
-    if (
-        relativeFilePath === '..' ||
-        relativeFilePath.startsWith(`..${path.sep}`) ||
-        path.isAbsolute(relativeFilePath)
-    ) {
-        throw new Error(`File ${filePath} is outside of source path ${sourcePath}`);
-    }
-
-    return relativeFilePath;
-}
-
-function toPosixPath(filePath: string) {
-    return filePath.split(path.sep).join(path.posix.sep);
-}
-
 function getContentEncoding(filePath: string) {
     switch (path.extname(filePath).toLowerCase()) {
         case '.gz':