Function getFixedToolEnvForCopilotMutation

src/shared/utils.ts:313–336

({ processEnv, toolEnv }: { processEnv: Record<string, string | undefined>; toolEnv: Record<string, string>; })

 * @returns  The default toolEnv to use.
 */
export function getFixedToolEnvForCopilotMutation({ processEnv, toolEnv }: { processEnv: Record<string, string | undefined>; toolEnv: Record<string, string>; }): Record<string, string> {
	// Workaround GitHub Copilot mutating the extension host processes env variables
	// to include safe.bareRepository=explicit which breaks Swift PM.
	//
	// If the last config added was safe.bareRepository=explicit, then reduce the count to remove it.

	const newToolEnv = Object.assign({}, toolEnv);
	const configCountEnvVarValue = processEnv.GIT_CONFIG_COUNT;
	// Has a value?
	if (typeof configCountEnvVarValue === "string") {
		const configCount = parseInt(configCountEnvVarValue, 10);
		// Is numeric?
		if (Number.isInteger(configCount)) {
			const lastConfigIndex = configCount - 1;
			// Last setting is the one we're trying to eliminate?
			if (processEnv[`GIT_CONFIG_KEY_${lastConfigIndex}`] === "safe.bareRepository"
				&& processEnv[`GIT_CONFIG_VALUE_${lastConfigIndex}`] === "explicit")
				// Wind back the count to exclude it.
				newToolEnv.GIT_CONFIG_COUNT = (configCount - 1).toString();
		}
	}

	return newToolEnv;
}