Category Archives: Programming
Go internals
Channels https://youtu.be/KBZlN0izeiY Go scheduler https://youtu.be/YHRO5WQGh0k
Setup local Athens for proper go mod
There is a project called Athens for proxying all your go mod downloads. How to use it locally. 1. Create the following files and directories: a. /Users/d.bolgov/.ssh-athens/storage — empty directory to cache go modules b. /Users/d.bolgov/.ssh-athens/.netrc — if you prefer using .netrc machine github.com login [yourlogin] password [yourpassword] c. /Users/d.bolgov/.ssh-athens/gitconfig/.gitconfig — if you want to …
Installing protobuf tools on MacOS
Installing protoc brew install protobuf Or follow different instructions. Installing grpc_cli Option 1. Easy way. brew tap grpc/grpc brew install —with-plugins grpc It is described here — https://github.com/grpc/homebrew-grpc. Option 2. Hard way — using cmake and make. NOT RECOMMENDED. brew install autoconf automake libtool shtool cmake git clone -b $(curl -L https://grpc.io/release) https://github.com/grpc/grpc cd grpc …
Nice talk about concurrency in Go
Another good talk. It’s not only about channels, but also about atomics and patterns around ti. https://www.youtube.com/watch?v=YEKjSzIwAdA
Make your bot for telegram using go
It’s really not that difficult. Here are the docs: https://core.telegram.org/bots https://core.telegram.org/bots/api Here is a simple library in go for telegram — https://github.com/go-telegram-bot-api/telegram-bot-api/ (too simple, from my point of view, does not cover all functionality, but okay). And here is a skeletton for making your bots if you want it as just standalone binary — https://github.com/nezorflame/example-telegram-bot/
Gitlab-ci: build go app with docker as a docker image
Preparations [TO BE UPDATED LATER] My gitlab-ci.yml variables: PACKAGE_PATH: /go/src/gitlab.com/[username_for_gitlab]/[project_name] # https://docs.gitlab.com/ee/ci/docker/using_docker_build.html CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest stages: — dep — test — build # A hack to make Golang-in-Gitlab happy .anchors: — &inject-gopath mkdir -p $(dirname ${PACKAGE_PATH}) && ln -s ${CI_PROJECT_DIR} ${PACKAGE_PATH} && cd ${PACKAGE_PATH} dep: stage: dep image: golang:1.13.1-alpine before_script: — *inject-gopath script: go …
Free weather APIs
https://openweathermap.org/api — old, odd, but works https://www.weatherbit.io/api https://developer.accuweather.com/accuweather-forecast-api/apis to be discovered https://darksky.net/dev/docs to be discovered http://api.weather2020.com/ to be discovered, looks abandoned https://www.aerisweather.com/support/docs/api/ works, but keys are for valid for 3 months only https://www.wunderground.com/api died (https://apicommunity.wunderground.com/weatherapi/topics/end-of-service-for-the-weather-underground-api)
Another cool article on using PostgreSQL+pgBouncer with go
Extremely interesting and very practical talk about problems occurring with go+pgBouncer (in Russian, sorry). https://habr.com/ru/company/oleg-bunin/blog/461935/ And a video on that: https://www.youtube.com/watch?v=Uojy57I-xP0
env-file parser for Goland
You can use env-file parser for running and debugging your app in Jetbrains’ products like Goland. It’s pretty simple and works. https://github.com/Ashald/EnvFile
How golang garbage collection works
It is a Mark-and-Sweep GC. Phases Mark Stop-the-World: Set write barrier (to know how much was allocated during maark phase) Concurrent: Mark all memory which is still in use by the app Stop-the-World: Remove write barrier Concurrent: Sweep (it actually happens on new allocations) Details/Algorithm It’s a tri-color process: grey for objects to check, black …