feat(linter): Extend project initialization fallbacks

src/linter/linter.ts

@@ -188,26 +188,38 @@ async function getProjectGraph(rootDir: string, ui5Config?: string | object): Pr
 		rootConfigPath = ui5YamlPath;
 	} else {
 		if (ui5Config) throw new Error(`Unable to find UI5 config file '${ui5Config}'`);
-		const isApp = await dirExists(path.join(rootDir, "webapp"));
-		if (isApp) {
-			rootConfiguration = {
-				specVersion: "3.0",
-				type: "application",
-				metadata: {
-					name: "ui5-linter-target",
-				},
-			};
-		} else {
-			const isLibrary = await dirExists(path.join(rootDir, "src"));
-			if (isLibrary) {
-				rootConfiguration = {
-					specVersion: "3.0",
-					type: "library",
-					metadata: {
-						name: "ui5-linter-target",
-					},
-				};
-			}
+
+		const dirChecks = await Promise.all([
+			dirExists(path.join(rootDir, "webapp")),
+			dirExists(path.join(rootDir, "src", "main", "webapp")),
+			dirExists(path.join(rootDir, "WebContent")),
+			dirExists(path.join(rootDir, "src", "main", "jslib")),
+			dirExists(path.join(rootDir, "src", "main", "js")),
+			dirExists(path.join(rootDir, "src", "main", "uilib")),
+			dirExists(path.join(rootDir, "src")),
+		]);
+
+		if (dirChecks[0]) {
+			// Common app with webapp folder
+			rootConfiguration = createProjectConfig("application", "webapp");
+		} else if (dirChecks[1]) {
+			// Legacy app with src/main/webapp folder
+			rootConfiguration = createProjectConfig("application", "src/main/webapp");
+		} else if (dirChecks[2]) {
+			// Legacy app with WebContent folder
+			rootConfiguration = createProjectConfig("application", "WebContent");
+		} else if (dirChecks[3]) {
+			// Library with src/main/jslib folder
+			rootConfiguration = createProjectConfig("library", "src/main/jslib", "src/test/jslib");
+		} else if (dirChecks[4]) {
+			// Library with src/main/js folder
+			rootConfiguration = createProjectConfig("library", "src/main/js", "src/test/js");
+		} else if (dirChecks[5]) {
+			// Library with src/main/uilib folder
+			rootConfiguration = createProjectConfig("library", "src/main/uilib", "src/test/uilib");
+		} else if (dirChecks[6]) {
+			// Library with src folder
+			rootConfiguration = createProjectConfig("library", "src", "test");
 		}
 	}
 
@@ -231,6 +243,47 @@ async function getProjectGraph(rootDir: string, ui5Config?: string | object): Pr
 	});
 }
 
+interface ProjectConfig {
+	specVersion: string;
+	type: string;
+	metadata: {
+		name: string;
+	};
+	resources?: {
+		configuration: {
+			paths: {
+				webapp?: string;
+				src?: string;
+				test?: string;
+			};
+		};
+	};
+}
+
+function createProjectConfig(projectType: string, projectSrcPath?: string, projectTestPath?: string): ProjectConfig {
+	let resourcesConfig: ProjectConfig["resources"] = {
+		configuration: {
+			paths: {},
+		},
+	};
+	if (projectType === "application") {
+		resourcesConfig.configuration.paths.webapp = projectSrcPath ?? "webapp";
+	} else if (projectType === "library") {
+		resourcesConfig.configuration.paths.src = projectSrcPath ?? "src";
+		resourcesConfig.configuration.paths.test = projectTestPath ?? "test";
+	} else {
+		// Do not set a resources configuration for other project types
+		resourcesConfig = undefined;
+	}
+	return {
+		specVersion: "4.0",
+		type: projectType,
+		metadata: {
+			name: "ui5-linter-project",
+		},
+		resources: resourcesConfig,
+	};
+}
 /**
  * Normalize provided virtual paths to the original file paths
  */
@@ -389,3 +442,8 @@ export function mergeIgnorePatterns(options: LinterOptions, config: UI5LintConfi
 		...(options.ignorePatterns ?? []), // CLI patterns go after config patterns
 	].filter(($) => $);
 }
+
+// Export local function for testing only
+export const __localFunctions__ = (process.env.NODE_ENV === "test") ?
+		{getProjectGraph} :
+	/* istanbul ignore next */ undefined;

test/fixtures/linter/projects/legacy-dirs/legacy.app.a/WebContent/manifest.json

@@ -0,0 +1,7 @@
+{
+	"_version": "1.12.0",
+	"sap.app": {
+		"id": "com.app",
+		"type": "application"
+	}
+}

test/fixtures/linter/projects/legacy-dirs/legacy.app.b/src/main/webapp/manifest.json

@@ -0,0 +1,7 @@
+{
+	"_version": "1.12.0",
+	"sap.app": {
+		"id": "com.app",
+		"type": "application"
+	}
+}

test/fixtures/linter/projects/legacy-dirs/legacy.lib.a/src/main/jslib/.library

@@ -0,0 +1,7 @@
+<?xml version="1.0" ?>
+<library xmlns="http://www.sap.com/sap.ui.library.xsd">
+	<name>library.with.custom.paths</name>
+	<vendor>SAP SE</vendor>
+	<version>${version}</version>
+	<copyright>${copyright}</copyright>
+</library>

test/fixtures/linter/projects/legacy-dirs/legacy.lib.b/src/main/uilib/.library

@@ -0,0 +1,7 @@
+<?xml version="1.0" ?>
+<library xmlns="http://www.sap.com/sap.ui.library.xsd">
+	<name>library.with.custom.paths</name>
+	<vendor>SAP SE</vendor>
+	<version>${version}</version>
+	<copyright>${copyright}</copyright>
+</library>

test/fixtures/linter/projects/legacy-dirs/legacy.lib.c/src/main/js/.library

@@ -0,0 +1,7 @@
+<?xml version="1.0" ?>
+<library xmlns="http://www.sap.com/sap.ui.library.xsd">
+	<name>library.with.custom.paths</name>
+	<vendor>SAP SE</vendor>
+	<version>${version}</version>
+	<copyright>${copyright}</copyright>
+</library>

test/lib/linter/linter.ts

@@ -2,6 +2,7 @@ import anyTest, {TestFn} from "ava";
 import sinonGlobal, {SinonStub} from "sinon";
 import path from "node:path";
 import {fileURLToPath} from "node:url";
+import esmock from "esmock";
 import {
 	createTestsForFixtures, assertExpectedLintResults,
 	esmockDeprecationText, preprocessLintResultsForSnapshot,
@@ -28,7 +29,7 @@ test.after.always((t) => {
 	t.context.sinon.restore();
 });
 
-// Define tests for reach file in the fixtures/linter/general directory
+// Define tests for each file in the fixtures/linter/general directory
 createTestsForFixtures(fixturesGeneralPath);
 
 // Test project fixtures individually
@@ -272,3 +273,154 @@ test.serial("lint: com.ui5.troublesome.app with custom UI5 config which does NOT
 		ui5Config,
 	}), {message: `Unable to find UI5 config file '${ui5Config}'`});
 });
+
+test.serial("lint: getProjectGraph with different directory structures", async (t) => {
+	const graphFromObjectStub = t.context.sinon.stub().resolves();
+	const {__localFunctions__} = await esmock("../../../src/linter/linter.js", {
+		"@ui5/project/graph": {
+			graphFromObject: graphFromObjectStub,
+		},
+	});
+
+	const {getProjectGraph} = __localFunctions__;
+
+	const basePath = path.join(fixturesProjectsPath, "legacy-dirs");
+
+	// Legacy app structures
+	const appA = path.join(basePath, "legacy.app.a");
+	const appB = path.join(basePath, "legacy.app.b");
+	const libA = path.join(basePath, "legacy.lib.a");
+	const libB = path.join(basePath, "legacy.lib.b");
+	const libC = path.join(basePath, "legacy.lib.c");
+
+	await getProjectGraph(appA);
+	await getProjectGraph(appB);
+	await getProjectGraph(libA);
+	await getProjectGraph(libB);
+	await getProjectGraph(libC);
+
+	t.is(graphFromObjectStub.callCount, 5);
+	t.deepEqual(graphFromObjectStub.getCall(0).args[0], {
+		dependencyTree: {
+			dependencies: [],
+			id: "ui5-linter-target",
+			path: appA,
+			version: "1.0.0",
+		},
+		resolveFrameworkDependencies: false,
+		rootConfigPath: undefined,
+		rootConfiguration: {
+			metadata: {
+				name: "ui5-linter-project",
+			},
+			resources: {
+				configuration: {
+					paths: {
+						webapp: "WebContent",
+					},
+				},
+			},
+			specVersion: "4.0",
+			type: "application",
+		},
+	});
+	t.deepEqual(graphFromObjectStub.getCall(1).args[0], {
+		dependencyTree: {
+			dependencies: [],
+			id: "ui5-linter-target",
+			path: appB,
+			version: "1.0.0",
+		},
+		resolveFrameworkDependencies: false,
+		rootConfigPath: undefined,
+		rootConfiguration: {
+			metadata: {
+				name: "ui5-linter-project",
+			},
+			resources: {
+				configuration: {
+					paths: {
+						webapp: "src/main/webapp",
+					},
+				},
+			},
+			specVersion: "4.0",
+			type: "application",
+		},
+	});
+	t.deepEqual(graphFromObjectStub.getCall(2).args[0], {
+		dependencyTree: {
+			dependencies: [],
+			id: "ui5-linter-target",
+			path: libA,
+			version: "1.0.0",
+		},
+		resolveFrameworkDependencies: false,
+		rootConfigPath: undefined,
+		rootConfiguration: {
+			metadata: {
+				name: "ui5-linter-project",
+			},
+			resources: {
+				configuration: {
+					paths: {
+						src: "src/main/jslib",
+						test: "src/test/jslib",
+					},
+				},
+			},
+			specVersion: "4.0",
+			type: "library",
+		},
+	});
+	t.deepEqual(graphFromObjectStub.getCall(3).args[0], {
+		dependencyTree: {
+			dependencies: [],
+			id: "ui5-linter-target",
+			path: libB,
+			version: "1.0.0",
+		},
+		resolveFrameworkDependencies: false,
+		rootConfigPath: undefined,
+		rootConfiguration: {
+			metadata: {
+				name: "ui5-linter-project",
+			},
+			resources: {
+				configuration: {
+					paths: {
+						src: "src/main/uilib",
+						test: "src/test/uilib",
+					},
+				},
+			},
+			specVersion: "4.0",
+			type: "library",
+		},
+	});
+	t.deepEqual(graphFromObjectStub.getCall(4).args[0], {
+		dependencyTree: {
+			dependencies: [],
+			id: "ui5-linter-target",
+			path: libC,
+			version: "1.0.0",
+		},
+		resolveFrameworkDependencies: false,
+		rootConfigPath: undefined,
+		rootConfiguration: {
+			metadata: {
+				name: "ui5-linter-project",
+			},
+			resources: {
+				configuration: {
+					paths: {
+						src: "src/main/js",
+						test: "src/test/js",
+					},
+				},
+			},
+			specVersion: "4.0",
+			type: "library",
+		},
+	});
+});