feat: remove obsolete parseTriggers fallback

[taeold]

This PR removes the obsolete parseTriggers.ts and related files (triggerParser.js, extractTriggers.js), which were used as a fallback for parsing function triggers in older versions of the Firebase Functions SDK.

This is part of a major version update and drops support for SDK versions older than 3.20.0.

[gemini-code-assist]

Summary of Changes

Hello @taeold, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly refactors the function trigger parsing mechanism by removing an obsolete fallback that supported older versions of the Firebase Functions SDK. By dropping support for SDK versions prior to 3.20.0, the codebase is streamlined, and a more robust error-handling approach is implemented for incompatible SDK versions. This change ensures that the system operates with modern SDK features and reduces technical debt.

Highlights

• Removal of Obsolete Trigger Parsing Fallback: The parseTriggers.ts module and its associated files (triggerParser.js, extractTriggers.js) have been completely removed, as they were part of an obsolete fallback mechanism for parsing function triggers.
• Enforcement of Minimum SDK Version: The system now explicitly requires firebase-functions SDK version 3.20.0 or newer. Instead of falling back to old parsing logic, an error is now thrown if an older SDK version is detected.
• Codebase Simplification: Eliminating the old trigger parsing logic and related files reduces codebase complexity and maintenance overhead, focusing on modern SDK features.
• Updated Build Configuration: The webpack.common.js configuration was cleaned up by removing commented-out references to copying uncompiled JavaScript files that were part of the obsolete trigger parsing system.
• New Test Coverage: A new test case was added to index.spec.ts to ensure proper error handling when an unsupported firebase-functions SDK version is detected during the build discovery process.

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[gemini-code-assist]

Code Review

This pull request effectively removes the obsolete parseTriggers fallback mechanism for older Firebase Functions SDK versions. The changes are clean and focused, including the removal of related files and tests. A new test has been added to ensure that an error is thrown for unsupported SDK versions, which is a great addition. My only concern is a small, potentially out-of-scope change in the webpack configuration that should be clarified.

[taeold]

/gemini review

[gemini-code-assist]

Code Review

This pull request effectively removes the obsolete parseTriggers fallback mechanism, which simplifies the codebase by deleting several files and their associated tests. The logic is correctly updated to enforce a minimum Firebase Functions SDK version by throwing an error instead of falling back, which is a sound approach for a major version update. The changes are clean and well-tested. I have one minor suggestion to improve code readability.

[gemini-code-assist]

For better readability, you could invert the if/else to handle the valid semver case first. This avoids nesting the main logic within an else block and follows a more common pattern of handling the success path before the error/edge case path.

Suggested change

	if (!semver.valid(this.sdkVersion)) {
	logger.debug(
	`Could not parse firebase-functions version '${this.sdkVersion}' into semver. Falling back to parseTriggers.`,
	);
	return parseTriggers.discoverBuild(this.projectId, this.sourceDir, this.runtime, config, env);
	}
	if (semver.lt(this.sdkVersion, MIN_FUNCTIONS_SDK_VERSION)) {
	logLabeledWarning(
	"functions",
	`You are using an old version of firebase-functions SDK (${this.sdkVersion}). ` +
	`Please update firebase-functions SDK to >=${MIN_FUNCTIONS_SDK_VERSION}`,
	);
	return parseTriggers.discoverBuild(this.projectId, this.sourceDir, this.runtime, config, env);
	}
	// Perform a check for the minimum SDK version that added annotation support for the `Build.extensions` property
	// and log to the user explaining why they need to upgrade their version.
	if (semver.lt(this.sdkVersion, MIN_FUNCTIONS_SDK_VERSION_FOR_EXTENSIONS_FEATURES)) {
	logLabeledBullet(
	"functions",
	`You are using a version of firebase-functions SDK (${this.sdkVersion}) that does not have support for the newest Firebase Extensions features. ` +
	`Please update firebase-functions SDK to >=${MIN_FUNCTIONS_SDK_VERSION_FOR_EXTENSIONS_FEATURES} to use them correctly`,
	);
	logger.debug(`Could not parse firebase-functions version '${this.sdkVersion}' into semver.`);
	} else {
	if (semver.lt(this.sdkVersion, MIN_FUNCTIONS_SDK_VERSION)) {
	throw new FirebaseError(
	`You are using an old version of firebase-functions SDK (${this.sdkVersion}). ` +
	`Please update firebase-functions SDK to >=${MIN_FUNCTIONS_SDK_VERSION}`,
	);
	}
	// Perform a check for the minimum SDK version that added annotation support for the `Build.extensions` property
	// and log to the user explaining why they need to upgrade their version.
	if (semver.lt(this.sdkVersion, MIN_FUNCTIONS_SDK_VERSION_FOR_EXTENSIONS_FEATURES)) {
	logLabeledBullet(
	"functions",
	`You are using a version of firebase-functions SDK (${this.sdkVersion}) that does not have support for the newest Firebase Extensions features. ` +
	`Please update firebase-functions SDK to >=${MIN_FUNCTIONS_SDK_VERSION_FOR_EXTENSIONS_FEATURES} to use them correctly`,
	);
	}
	}
	if (semver.valid(this.sdkVersion)) {
	if (semver.lt(this.sdkVersion, MIN_FUNCTIONS_SDK_VERSION)) {
	throw new FirebaseError(
	`You are using an old version of firebase-functions SDK (${this.sdkVersion}). ` +
	`Please update firebase-functions SDK to >=${MIN_FUNCTIONS_SDK_VERSION}`,
	);
	}
	// Perform a check for the minimum SDK version that added annotation support for the `Build.extensions` property
	// and log to the user explaining why they need to upgrade their version.
	if (semver.lt(this.sdkVersion, MIN_FUNCTIONS_SDK_VERSION_FOR_EXTENSIONS_FEATURES)) {
	logLabeledBullet(
	"functions",
	`You are using a version of firebase-functions SDK (${this.sdkVersion}) that does not have support for the newest Firebase Extensions features. ` +
	`Please update firebase-functions SDK to >=${MIN_FUNCTIONS_SDK_VERSION_FOR_EXTENSIONS_FEATURES} to use them correctly`,
	);
	}
	} else {
	logger.debug(`Could not parse firebase-functions version '${this.sdkVersion}' into semver.`);
	}