Initialize echo backend project

backend-go/.gitignore

@@ -0,0 +1,28 @@
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+go.work.sum
+
+# env file
+.env
+
+# bin
+bin

backend-go/.golangci.yml

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+run:
+  deadline: 5m
+
+linters:
+  enable:
+    - errcheck
+    - goimports
+    - govet
+    - goconst
+    - gocyclo
+    - gofmt
+    - revive
+    - goprintffuncname
+    - gosec
+    - lll
+    - misspell
+    - nakedret
+    - wrapcheck
+  disable:
+    - gosimple
+    - staticcheck
+    - structcheck
+    - unused

backend-go/Makefile

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+CODEPAIR_VERSION := 0.2.0
+
+default: help
+
+tools: ## install tools for developing codepair
+	go install github.com/golangci/golangci-lint/cmd/[email protected]
+
+build: ## builds an executable that runs in the current environment
+	go build -o ./bin/codepair ./cmd/codepair
+
+fmt: ## applies format and simplify codes
+	go fmt ./...
+
+lint: ## runs the golang-ci lint, checks for lint violations
+	golangci-lint run
+
+test: ## run tests
+	go test -v ./...
+
+clean: ## remove build artifacts
+	rm -rf ./bin
+
+help:
+	@echo 'Commands:'
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "    %-20s %s\n", $$1, $$2}'
+	@echo
+
+.PHONY: tools build fmt lint test clean help

backend-go/README.md

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+# CodePair Service Backend
+
+This project is the backend part of the CodePair service developed using Go.
+It is being migrated from the NestJS framework to Go. (Related Issue: [#430](https://github.com/yorkie-team/codepair/issues/430))
+
+## Setting Developing Environment
+
+### Requirements
+
+Below are needed for developing and building CodePair.
+
+- [Go](https://golang.org) (version 1.18+)
+
+### Building & Testing
+
+You can build the CodePair project by running the following command.
+
+```sh
+make tools
+make build		# executable: ./bin/codepair
+```
+
+You can automatically check the programmatic and stylistic errors of your code.
+
+```sh
+make lint
+```

backend-go/cmd/codepair/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+func main() {
+	e := echo.New()
+	e.GET("/", func(c echo.Context) error {
+		err := c.String(http.StatusOK, "Hello, World!")
+		return fmt.Errorf("error: %w", err)
+	})
+	e.Logger.Fatal(e.Start(":3001"))
+}

backend-go/go.mod

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+module github.com/yorkie-team/codepair/backend
+
+go 1.23.3
+
+require (
+	github.com/labstack/echo/v4 v4.13.3 // indirect
+	github.com/labstack/gommon v0.4.2 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/valyala/fasttemplate v1.2.2 // indirect
+	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/net v0.33.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+)

backend-go/go.sum

@@ -0,0 +1,23 @@
+github.com/labstack/echo/v4 v4.13.3 h1:pwhpCPrTl5qry5HRdM5FwdXnhXSLSY+WE+YQSeCaafY=
+github.com/labstack/echo/v4 v4.13.3/go.mod h1:o90YNEeQWjDozo584l7AwhJMHN0bOC4tAfg+Xox9q5g=
+github.com/labstack/gommon v0.4.2 h1:F8qTUNXgG1+6WQmqoUWnz8WiEU60mXVVw0P4ht1WRA0=
+github.com/labstack/gommon v0.4.2/go.mod h1:QlUFxVM+SNXhDL/Z7YhocGIBYOiwB0mXm1+1bAPHPyU=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
+github.com/valyala/fasttemplate v1.2.2 h1:lxLXG0uE3Qnshl9QyaK6XJxMXlQZELvChBOCmQD0Loo=
+github.com/valyala/fasttemplate v1.2.2/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
+golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
+golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=