makefile, goreleaser and so on

Author: mxssl

.gitignore

@@ -0,0 +1 @@
+wait-for-pg

.goreleaser.yml

@@ -0,0 +1,20 @@
+before:
+  hooks:
+    - go mod download
+builds:
+- env:
+  - CGO_ENABLED=0
+  goos:
+    - linux
+  goarch:
+    - amd64
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+    - '^docs:'
+    - '^test:'

Dockerfile

@@ -0,0 +1,25 @@
+FROM golang:1.13.4-alpine3.10 as builder
+
+ENV GO111MODULE=on
+
+WORKDIR /go/src/github.com/mxssl/wait-for-pg
+COPY . .
+
+# Install external dependcies
+RUN apk add --no-cache \
+  ca-certificates \
+  curl \
+  git
+
+# Compile binary
+RUN CGO_ENABLED=0 \
+  GOOS=`go env GOHOSTOS` \
+  GOARCH=`go env GOHOSTARCH` \
+  go build -o wait-for-pg
+
+# Copy compiled binary to clear Alpine Linux image
+FROM alpine:3.10.3
+WORKDIR /
+RUN apk add --no-cache ca-certificates
+COPY --from=builder /go/src/github.com/mxssl/wait-for-pg/wait-for-pg /usr/local/bin/wait-for-pg
+RUN chmod +x /usr/local/bin/wait-for-pg

Makefile

@@ -0,0 +1,41 @@
+BINARY_NAME=wait-for-pg
+CURRENT_DIR=$(shell pwd)
+TAG=$(shell git name-rev --tags --name-only $(git rev-parse HEAD))
+DOCKER_REGISTRY=mxssl
+export GO111MODULE=on
+
+.PHONY: all build clean lint test init github-release-dry github-release docker-release
+
+all: build
+
+build:
+	go build -o ${BINARY_NAME} -v
+
+clean:
+	rm -f ${BINARY_NAME}
+
+lint:
+	golangci-lint run -v
+
+test:
+	go test -v ./...
+
+init:
+	go mod init
+
+tidy:
+	go mod tidy
+
+github-release-dry:
+	echo -e "TAG: ${TAG}"
+	goreleaser release --rm-dist --snapshot --skip-publish
+
+github-release:
+	echo -e "TAG: ${TAG}"
+	goreleaser release --rm-dist
+
+docker-release:
+	echo -e "Registry: ${DOCKER_REGISTRY}"
+	echo -e "TAG: ${TAG}"
+	docker build --tag ${DOCKER_REGISTRY}/${BINARY_NAME}:${TAG} .
+	docker push ${DOCKER_REGISTRY}/${BINARY_NAME}:${TAG}

README.md

@@ -1,16 +1,16 @@
 # wait-for-pg
 
-## install
+Simple app that checks if PostgreSQL database is ready or not.
+
+## Install and usage
+
+### Option 1: use binary
 
 ```sh
-wget https://github.com/mxssl/wait-for-pg/releases/download/v0.0.1/wait-for-pg -O /usr/local/bin/wait-for-pg
+wget https://github.com/mxssl/wait-for-pg/releases/download/v0.0.2/wait-for-pg -O /usr/local/bin/wait-for-pg
 
 chmod +x /usr/local/bin/wait-for-pg
-```
 
-## usage
-
-```sh
 wait-for-pg check \
   --host postgres.domain.com \
   --port 5432 \
@@ -21,5 +21,22 @@ wait-for-pg check \
   --sleep 2
 ```
 
+### Option 2: use docker container
+
+```sh
+docker container \
+  run \
+  --rm \
+  mxssl/wait-for-pg:0.0.2 \
+  wait-for-pg check \
+    --host postgres.domain.com \
+    --port 5432 \
+    --user pguser \
+    --password pgpass \
+    --dbname dbname \
+    --retry 10 \
+    --sleep 2
+```
+
 - If PG is ready then app returns exit code 0
 - If PG isn't ready then app returns exit code 1

cmd/check.go

@@ -84,7 +84,8 @@ func check(c config) {
 				log.Printf("Error: %s", err.Error())
 				continue
 			}
-		} else if db == nil {
+		}
+		if db == nil {
 			log.Printf("Error: %s", err.Error())
 			continue
 		}

go.mod

@@ -0,0 +1,28 @@
+module github.com/mxssl/wait-for-pg
+
+go 1.13
+
+require (
+	github.com/bombsimon/wsl v1.2.8 // indirect
+	github.com/go-critic/go-critic v0.4.0 // indirect
+	github.com/gogo/protobuf v1.3.1 // indirect
+	github.com/golangci/gocyclo v0.0.0-20180528144436-0a533e8fa43d // indirect
+	github.com/golangci/golangci-lint v1.21.0 // indirect
+	github.com/golangci/revgrep v0.0.0-20180812185044-276a5c0a1039 // indirect
+	github.com/gostaticanalysis/analysisutil v0.0.3 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
+	github.com/lib/pq v1.2.0
+	github.com/mattn/go-isatty v0.0.10 // indirect
+	github.com/pelletier/go-toml v1.6.0 // indirect
+	github.com/securego/gosec v0.0.0-20191119104125-df484bfa9e9f // indirect
+	github.com/spf13/afero v1.2.2 // indirect
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/viper v1.5.0 // indirect
+	github.com/uudashr/gocognit v1.0.0 // indirect
+	golang.org/x/sys v0.0.0-20191128015809-6d18c012aee9 // indirect
+	golang.org/x/tools v0.0.0-20191127201027-ecd32218bd7f // indirect
+	gopkg.in/yaml.v2 v2.2.7 // indirect
+	mvdan.cc/unparam v0.0.0-20191111180625-960b1ec0f2c2 // indirect
+	sourcegraph.com/sqs/pbtypes v1.0.0 // indirect
+)