[Backport 1.x] Adds @osd/cross-platform (#2681 & #2703) (#2989)

* [@osd/cross-platform] Adds cross-platform helpers (#2681)

cherry-pick from 887093d

Signed-off-by: Miki <amoo_miki@yahoo.com>

* Adds @osd/cross-platform (#2703)

* Adds helper functions, @osd/cross-platform, to work around the differences of platforms

cherry-pick from 0c9ca96

Signed-off-by: Miki <amoo_miki@yahoo.com>

Signed-off-by: Miki <amoo_miki@yahoo.com>
Co-authored-by: Anan Zhuang <ananzh@amazon.com>
(cherry picked from commit f9bffcb)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

# Conflicts:
#	CHANGELOG.md

package.json

@@ -138,6 +138,7 @@
     "@osd/apm-config-loader": "1.0.0",
     "@osd/config": "1.0.0",
     "@osd/config-schema": "1.0.0",
+    "@osd/cross-platform": "1.0.0",
     "@osd/i18n": "1.0.0",
     "@osd/interpreter": "1.0.0",
     "@osd/logging": "1.0.0",

packages/osd-config-schema/package.json

@@ -10,6 +10,7 @@
     "osd:bootstrap": "yarn build"
   },
   "devDependencies": {
+    "@osd/cross-platform": "1.0.0",
     "typescript": "4.0.2",
     "tsd": "^0.16.0"
   },

packages/osd-config-schema/src/errors/schema_error.test.ts

@@ -33,6 +33,8 @@
 import { relative, sep } from 'path';
 import { SchemaError } from '.';
 
+import { standardize, getRepoRoot } from '@osd/cross-platform';
+
 /**
  * Make all paths in stacktrace relative.
  */
@@ -48,9 +50,7 @@ export const cleanStack = (stack: string) =>
       }
 
       const path = parts[1];
-      // Cannot use `standardize` from `@osd/utils
-      let relativePath = relative(process.cwd(), path);
-      if (process.platform === 'win32') relativePath = relativePath.replace(/\\/g, '/');
+      const relativePath = standardize(relative(getRepoRoot(path) || '.', path));
 
       return line.replace(path, relativePath);
     })

packages/osd-cross-platform/README.md

@@ -0,0 +1,28 @@
+# `@osd/cross-platform` — OpenSearch Dashboards cross-platform helpers
+
+This package contains the helpers to work around the differences across platforms, such as the difference in the path segment separator and the possibility of referencing a path using the short 8.3 name (SFN), a long name, and a long UNC on Windows. 
+
+Some helpers are functions that `standardize` the reference to a path or help `getRepoRoot`, and some are constants referencing the `PROCESS_WORKING_DIR` or `REPO_ROOT`.
+
+### Example
+
+When the relative reference of `path` to the working directory is needed, using the code below would produce different results on Linux that it would on Windows and if the process was started in a Windows shell that used short paths, the results differ from a Windows shell that used long paths.
+```js
+import { relative } from 'path';
+
+const relativePath = relative(process.cwd(), path);
+
+// Output on Linux: relative-path/to/a/file
+//         Windows: relative-path\to\a\file
+//     Windows SFN: RELATI~1\to\a\file
+```
+
+To avoid those differences, helper functions and constants can be used:
+```js
+import { relative } from 'path';
+import { standardize, PROCESS_WORKING_DIR } from '@osd/cross-platform';
+
+const relativePath = standardize(relative(PROCESS_WORKING_DIR, path));
+
+// Output: relative-path/to/a/file
+```

packages/osd-cross-platform/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@osd/cross-platform",
+  "main": "./target/index.js",
+  "version": "1.0.0",
+  "license": "Apache-2.0",
+  "private": true,
+  "scripts": {
+    "build": "tsc",
+    "osd:bootstrap": "yarn build"
+  },
+  "devDependencies": {
+    "typescript": "4.0.2",
+    "tsd": "^0.16.0"
+  }
+}

packages/osd-cross-platform/src/index.ts

@@ -0,0 +1,8 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export * from './path';
+export * from './process';
+export * from './repo_root';

packages/osd-cross-platform/src/path.test.ts

@@ -0,0 +1,207 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import path from 'path';
+import fs from 'fs';
+import del from 'del';
+
+import {
+  resolveToFullNameSync,
+  resolveToFullPathSync,
+  resolveToShortNameSync,
+  resolveToShortPathSync,
+  shortNamesSupportedSync,
+  realPathSync,
+  realShortPathSync,
+  standardize,
+} from './path';
+
+const tmpTestFolder = './__test_artifacts__';
+const longFolderName = '.long-folder-name';
+const longFileName = '.long-file-name.txt';
+const longSymlinkName = '.sym.link';
+const shortFolderName = 'LONG-F~1';
+const shortFileName = 'LONG-F~1.TXT';
+const dummyWindowsPath = 'C:\\a\\b\\c';
+const dummyWindowsPOSIXPath = 'C:/a/b/c';
+const dummyPOSIXPath = '/a/b/c';
+
+const onWindows = process.platform === 'win32' ? describe : xdescribe;
+const onWindowsWithShortNames = shortNamesSupportedSync() ? describe : xdescribe;
+
+// Save the real process.platform
+const realPlatform = Object.getOwnPropertyDescriptor(process, 'platform')!;
+
+describe('Cross Platform', () => {
+  describe('path', () => {
+    onWindows('on Windows', () => {
+      onWindowsWithShortNames('when 8.3 is supported', () => {
+        beforeAll(() => {
+          // Cleanup
+          try {
+            // If leftover artifacts were found, get rid of them
+            del.sync(tmpTestFolder);
+          } catch (ex) {
+            // Do nothing; if `rmdir` failed, let the `mkdir` below throw the error
+          }
+
+          fs.mkdirSync(tmpTestFolder);
+          fs.mkdirSync(path.resolve(tmpTestFolder, longFolderName));
+          fs.writeFileSync(path.resolve(tmpTestFolder, longFolderName, longFileName), '');
+          fs.symlinkSync(
+            path.resolve(tmpTestFolder, longFolderName),
+            path.resolve(tmpTestFolder, longSymlinkName),
+            'junction'
+          );
+        });
+
+        afterAll(() => {
+          try {
+            del.sync(tmpTestFolder);
+          } catch (ex) {
+            // Do nothing
+          }
+        });
+
+        it('can synchronously extract full name of a folder', () => {
+          const name = path.basename(
+            resolveToFullPathSync(path.resolve(tmpTestFolder, shortFolderName))
+          );
+          expect(name).toBe(longFolderName);
+        });
+
+        it('can synchronously extract full name of a file', () => {
+          const name = path.basename(
+            resolveToFullNameSync(path.resolve(tmpTestFolder, shortFolderName, shortFileName))
+          );
+          expect(name).toBe(longFileName);
+        });
+
+        it('can synchronously extract short name of a folder', () => {
+          const name = path.basename(
+            resolveToShortPathSync(path.resolve(tmpTestFolder, longFolderName))
+          );
+          expect(name).toBe(shortFolderName);
+        });
+
+        it('can synchronously extract short name of a file', () => {
+          const name = path.basename(
+            resolveToShortNameSync(path.resolve(tmpTestFolder, longFolderName, longFileName))
+          );
+          expect(name).toBe(shortFileName);
+        });
+
+        it('can synchronously extract full name of a symbolic link', () => {
+          const name = path.basename(realPathSync(path.resolve(tmpTestFolder, longSymlinkName)));
+          expect(name).toBe(longFolderName);
+        });
+
+        it('can synchronously extract short name of a symbolic link', () => {
+          const name = path.basename(
+            realShortPathSync(path.resolve(tmpTestFolder, longSymlinkName))
+          );
+          expect(name).toBe(shortFolderName);
+        });
+      });
+    });
+
+    describe('on platforms other than Windows', () => {
+      let mockPathNormalize: jest.SpyInstance<string, [p: string]>;
+      let mockPathResolve: jest.SpyInstance<string, string[]>;
+      let mockFSRealPathSync: jest.SpyInstance<string>;
+
+      beforeAll(() => {
+        Object.defineProperty(process, 'platform', {
+          ...Object.getOwnPropertyDescriptor(process, 'property'),
+          value: 'linux',
+        });
+
+        mockPathNormalize = jest.spyOn(path, 'normalize').mockReturnValue(dummyPOSIXPath);
+        mockPathResolve = jest.spyOn(path, 'resolve').mockReturnValue(dummyPOSIXPath);
+        mockFSRealPathSync = jest
+          .spyOn(fs, 'realpathSync')
+          .mockReturnValue(dummyPOSIXPath) as jest.SpyInstance<string>;
+      });
+
+      afterAll(() => {
+        // Restore the real property value after each test
+        Object.defineProperty(process, 'platform', realPlatform);
+        mockPathNormalize.mockRestore();
+        mockPathResolve.mockRestore();
+        mockFSRealPathSync.mockRestore();
+      });
+
+      it('all short and full name methods return just the normalized paths', () => {
+        expect(shortNamesSupportedSync()).toBe(false);
+        expect(resolveToFullPathSync(dummyPOSIXPath)).toBe(dummyPOSIXPath);
+        expect(resolveToShortPathSync(dummyPOSIXPath)).toBe(dummyPOSIXPath);
+      });
+    });
+
+    describe('standardize', () => {
+      describe('on Windows', () => {
+        let mockPathNormalize: jest.SpyInstance<string, [p: string]>;
+
+        beforeAll(() => {
+          Object.defineProperty(process, 'platform', {
+            ...Object.getOwnPropertyDescriptor(process, 'property'),
+            value: 'win32',
+          });
+
+          mockPathNormalize = jest.spyOn(path, 'normalize').mockReturnValue(dummyWindowsPath);
+        });
+
+        afterAll(() => {
+          // Restore the real property value after each test
+          Object.defineProperty(process, 'platform', realPlatform);
+          mockPathNormalize.mockRestore();
+        });
+
+        it('produces a path in native format', () => {
+          expect(standardize(dummyWindowsPath, false, false)).toMatchSnapshot();
+        });
+
+        it('produces a path in native format even for POSIX input', () => {
+          expect(standardize(dummyWindowsPOSIXPath, false, false)).toMatchSnapshot();
+        });
+
+        it('produces a path in native format with escaped backslashes', () => {
+          expect(standardize(dummyWindowsPath, false, true)).toMatchSnapshot();
+        });
+
+        it('produces a path in POSIX format', () => {
+          expect(standardize(dummyWindowsPath)).toMatchSnapshot();
+        });
+      });
+
+      describe('on POSIX-compatible platforms', () => {
+        let mockPathNormalize: jest.SpyInstance<string, [p: string]>;
+
+        beforeAll(() => {
+          Object.defineProperty(process, 'platform', {
+            ...Object.getOwnPropertyDescriptor(process, 'property'),
+            value: 'linux',
+          });
+
+          mockPathNormalize = jest.spyOn(path, 'normalize').mockReturnValue(dummyPOSIXPath);
+        });
+
+        afterAll(() => {
+          // Restore the real property value after each test
+          Object.defineProperty(process, 'platform', realPlatform);
+          mockPathNormalize.mockRestore();
+        });
+
+        it('produces a path in POSIX format', () => {
+          expect(standardize(dummyPOSIXPath)).toMatchSnapshot();
+        });
+
+        it('ignores additional parameters', () => {
+          expect(standardize(dummyPOSIXPath, false, true)).toMatchSnapshot();
+        });
+      });
+    });
+  });
+});