classic

Author: n1ru4l

packages/libraries/cli/src/helpers/git-schema-loader.ts

@@ -0,0 +1,70 @@
+import { execSync } from 'node:child_process';
+
+function isGlobPath(path: string) {
+  const globPattern = /[*?{}\[\]()]/;
+  return globPattern.test(path);
+}
+
+const filePathPattern = 'file://';
+
+function parseSingleLocalFilePath(schemaPointer: string) {
+  if (schemaPointer.includes('://') && !schemaPointer.startsWith(filePathPattern)) {
+    return {
+      status: 'error' as const,
+      error: {
+        type: 'path' as const,
+        message: 'URL is not a local path.',
+      },
+    };
+  }
+
+  if (isGlobPath(schemaPointer)) {
+    return {
+      status: 'error' as const,
+      error: {
+        type: 'path' as const,
+        message: 'Path is a glob pattern.',
+      },
+    };
+  }
+
+  return {
+    status: 'ok' as const,
+    path: schemaPointer.startsWith(filePathPattern)
+      ? schemaPointer.substring(0, filePathPattern.length)
+      : schemaPointer,
+  };
+}
+
+const buildShowGitFileCommand = (commit: string, path: string) => `git show ${commit}:${path}`;
+
+function loadGitFile(commit: string, path: string) {
+  try {
+    const sdl = execSync(buildShowGitFileCommand(commit, path), { cwd: process.cwd() }).toString();
+    return {
+      status: 'ok' as const,
+      sdl,
+    };
+  } catch (error) {
+    if (error instanceof Error) {
+      return {
+        status: 'error' as const,
+        error: {
+          type: 'git' as const,
+          message: 'Failed to load schema SDL.\n' + error.message,
+          path,
+        },
+      };
+    }
+    throw error;
+  }
+}
+
+export function loadSchemaFromGitHistory(schemaPointer: string, commit: string) {
+  const pathResult = parseSingleLocalFilePath(schemaPointer);
+  if (pathResult.error) {
+    return pathResult;
+  }
+  const fileResult = loadGitFile(commit, pathResult.path);
+  return fileResult;
+}