Batuhan Apaydın developer-guy

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

	# Source: https://gist.github.com/820aecf0799d679d9082eef00d07b515

	#############################################################################
	# Bitnami Sealed Secrets #
	# How To Store Kubernetes Secrets In Git Repositories Without Getting Fired #
	# https://youtu.be/xd2QoV6GJlc #
	#############################################################################

	# Referenced videos:
	# - What Is GitOps And Why Do We Want It?: https://youtu.be/qwyRJlmG5ew

	#!/usr/bin/env bash
	set -e
	# Proxy minikube to localhost on arbitrary port:
	kubectl proxy --port=8080 &
	sleep 3

	# Now swagger.json is available at localhost:12345/openapi/v2
	# Save to /tmp/temp/json and serve with e.g. docker swagger-ui container
	curl http://localhost:8080/openapi/v2 > /tmp/temp.json
	docker container run -d -p 9999:8080 -e SWAGGER_JSON=/var/specs/temp.json -v /tmp/temp.json:/var/specs/temp.json swaggerapi/swagger-ui

	package main

	import (
	"context"
	"flag"
	image2 "github.com/aquasecurity/fanal/artifact/image"
	"github.com/aquasecurity/fanal/cache"
	"github.com/aquasecurity/fanal/image"
	dbTypes "github.com/aquasecurity/trivy-db/pkg/types"
	"github.com/aquasecurity/trivy/pkg/log"

	image: gitlab.dev.terastrm.net:4567/terastream/cisco-nso/ci-cisco-nso:4.2.3

	stages:
	- build
	- mr-robot

	variables:
	NCS_VERSION: "4.2.3"
	DOCKER_REGISTRY: "gitlab.dev.terastrm.net:4567/terastream/cisco-nso"
	TARGET_REGISTRY: "repo.dev.terastrm.net:5000/"

	package tar_helper

	import (
	"archive/tar"
	"compress/gzip"
	"errors"
	"fmt"
	"io"
	"io/ioutil"
	"os"

	package main

	import (
	"bytes"
	"io"
	"io/ioutil"
	"log"
	"os"
	"os/exec"

	# Sample from @citizen428 https://dev.to/citizen428/comment/6cmh
	FROM golang:alpine as build
	RUN apk add --no-cache ca-certificates
	WORKDIR /build
	ADD . .
	RUN CGO_ENABLED=0 GOOS=linux \
	go build -ldflags '-extldflags "-static"' -o app

	FROM scratch
	COPY --from=build /etc/ssl/certs/ca-certificates.crt \

	package main

	import (
	"context"
	"fmt"
	"github.com/containers/image/copy"
	"github.com/containers/image/docker"
	"github.com/containers/image/manifest"
	"github.com/containers/image/signature"
	"github.com/containers/image/types"