Prevent error when local plugin not found

[chris-steele]

If the database indicates a plugin is installed locally, but the plugin is not on disk (or bower registered), an uncaught error is thrown. This can have the effect of halting the installation of framework plugins which results in various issues, the first evidence often being a missing schema error.

See also: #204, #180

adapt-cli/lib/integration/Plugin.js

Lines 152 to 158 in 291b63a

	/**
	* whether querying the server or disk for plugin information worked
	* @returns {boolean}
	*/
	get isPresent () {
	return Boolean(this._projectInfo || this._sourceInfo)
	}

adapt-cli/lib/integration/Plugin.js

Lines 292 to 303 in 291b63a

	if (this.isLocalSource) {
	const info = this.projectVersion ? this._projectInfo : this._sourceInfo
	const satisfiesConstraint = !this.hasValidRequestVersion || semver.satisfies(info.version, this.requestedVersion, semverOptions)
	const satisfiesFramework = semver.satisfies(framework, info.framework)
	if (satisfiesFramework && satisfiesConstraint) this.latestCompatibleSourceVersion = info.version
	return info.version
	}
	if (!this.isPresent) return null
	// check if the latest version is compatible
	const satisfiesConstraint = !this.hasValidRequestVersion || semver.satisfies(this._sourceInfo.version, this.requestedVersion, semverOptions)