sviatoslav-lebediev sviatoslav-lebediev

Serverless plugin author's cheat sheet

This cheat sheet provides a detailed overview of the exposed lifecycle events and available commands (and entrypoints) of the Serverless framework, that can be hooked by plugins (internal and external ones). The document is structured by the commands invoked by the user.

Lifecycle events are shown as the globally available outer events (all providers) and sub lifecycle events that are provider specific in the called order. Currently only the AWS provider is shown. If you have information about the other provider,

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

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Advanced SCSS

Or, 16 cool things you may not have known your stylesheets could do. I'd rather have kept it to a nice round number like 10, but they just kept coming. Sorry.

I've been using SCSS/SASS for most of my styling work since 2009, and I'm a huge fan of Compass (by the great @chriseppstein). It really helped many of us through the darkest cross-browser crap. Even though browsers are increasingly playing nice with CSS, another problem has become very topical: managing the complexity in stylesheets as our in-browser apps get larger and larger. SCSS is an indispensable tool for dealing with this.

This isn't an introduction to the language by a long shot; many things probably won't make sense unless you have some SCSS under your belt already. That said, if you're not yet comfy with the basics, check out the aweso

	CustomMetric:
	Type: AWS::Logs::MetricFilter
	Properties:
	LogGroupName: !Sub /aws/lambda/${AWS::StackName}
	FilterPattern: '[str="REPORT", ..., str="Max", str="Memory", str="Used:", MaxMemoryUsed, str="MB"]'
	MetricTransformations:
	- MetricNamespace: Organization/Project/Service
	MetricName: MaxMemoryUsed
	MetricValue: $MaxMemoryUsed

	'use strict';

	// This plugin will bind to all available lifecycle events and print them out as they are invoked
	class LifecyclePrinter {
	constructor(serverless, options) {
	this.serverless = serverless;
	this.options = options;

	this.provider = this.serverless.getProvider('aws');

	--log_gc (Log heap samples on garbage collection for the hp2ps tool.)
	type: bool default: false
	--expose_gc (expose gc extension)
	type: bool default: false
	--max_new_space_size (max size of the new generation (in kBytes))
	type: int default: 0
	--max_old_space_size (max size of the old generation (in Mbytes))
	type: int default: 0
	--max_executable_size (max size of executable memory (in Mbytes))
	type: int default: 0

	** Find commmonly accessed tables and their use of indexes:

	SELECT relname,seq_tup_read,idx_tup_fetch,cast(idx_tup_fetch AS numeric) / (idx_tup_fetch + seq_tup_read) AS idx_tup_pct FROM pg_stat_user_tables WHERE (idx_tup_fetch + seq_tup_read)>0 ORDER BY idx_tup_pct;

	Returns output like:

	relname \| seq_tup_read \| idx_tup_fetch \| idx_tup_pct
	----------------------+--------------+---------------+------------------------
	schema_migrations \| 817 \| 0 \| 0.00000000000000000000
	user_device_photos \| 349 \| 0 \| 0.00000000000000000000