feat: string-unpack api

.env.dist

@@ -0,0 +1,7 @@
+COMPOSE_PROJECT_NAME=h-skills
+ALPINE_VER=3.19
+GOVERTER_VER=v1.4.0
+GOLANGCI_LINT_VER=v1.56.2
+POSTGRES_VER=16.2
+AIR_VER=1.52.0
+SQLC_VER=1.26.0

.gitignore

@@ -0,0 +1,4 @@
+/.task
+/.env
+/bin/env
+/tmp/

.golangci.yml

@@ -0,0 +1,2 @@
+# golangci-lint configuration file.
+# Read more at: https://github.com/golangci/golangci-lint#config-file

Dockerfile

@@ -0,0 +1,20 @@
+ARG POSTGRES_VER
+ARG GO_VER
+ARG ALPINE_VER
+
+FROM postgres:${POSTGRES_VER} AS postgres
+
+COPY ./string-unpack/internal/db/* /docker-entrypoint-initdb.d/
+
+RUN set -ex \
+    && chmod 1777 /tmp
+
+FROM golang:${GO_VER}-alpine${ALPINE_VER} AS golang
+
+ARG AIR_VER
+RUN set -ex \
+    && chmod 1777 /tmp \
+    &&  apk add --no-cache \
+        git \
+        tzdata \
+    && go install github.com/cosmtrek/air@v${AIR_VER}

Taskfile.go.yaml

@@ -0,0 +1,129 @@
+version: '3'
+
+vars:
+  GOFUMPT_VER: '{{.GOFUMPT_VER | default "latest"}}'
+  GOIMPORTS_LOCAL: '{{.GOIMPORTS_LOCAL | default nil}}'
+  GOIMPORT_VER: '{{.GOIMPORT_VER | default "latest"}}'
+  GOLANGCI_LINT_VER: '{{.GOLANGCI_LINT_VER | default "latest"}}'
+  GOVULNCHECK_VER: '{{.GOVULNCHECK_VER | default "latest"}}'
+  PROTOLINT_VER: '{{.PROTOLINT_VER | default "latest"}}'
+  STATICCHECK_VER: '{{.STATICCHECK_VER | default "latest"}}'
+  TMP_DIR: '{{.TMP_DIR | default "./tmp"}}'
+
+tasks:
+  # =======
+  # HELPERS
+  # =======
+
+  lint:
+    desc: golangci-lint + protolint.
+    cmds:
+    - task: govulncheck
+    - task: staticcheck
+    - task: golangci-lint
+    - task: protolint
+
+  cs:
+    desc: fmt + goimports.
+    cmds:
+    - task: fmt
+    - task: goimports
+
+  # ===============
+  # QUALITY CONTROL
+  # ===============
+
+  fmt:
+    desc: format code using gofumpt.
+    cmds:
+    - >-
+      go run mvdan.cc/gofumpt@{{.GOFUMPT_VER}} -l -w .
+    sources:
+    - ./**/*.go
+
+  goimports:
+    desc: format imports using goimports.
+    cmds:
+    - >-
+      go run golang.org/x/tools/cmd/goimports@{{.GOIMPORT_VER}}
+      {{if .GOIMPORTS_LOCAL}} -local="{{.GOIMPORTS_LOCAL}}"{{end}} 
+      -w .
+    sources:
+    - ./**/*.go
+
+  tidy:
+    desc: go mod tidy + go mod verify.
+    cmds:
+    - go mod tidy -v
+    - go mod verify
+    sources:
+    - ./**/*.go
+    - go.mod
+    - go.sum
+
+  golangci-lint:
+    desc: golangci-lint.
+    cmds:
+    - go run github.com/golangci/golangci-lint/cmd/golangci-lint@{{.GOLANGCI_LINT_VER}} run -v ./...
+    sources:
+    - ./**/*.go
+
+  govulncheck:
+    desc: govulncheck.
+    cmds:
+    - go run golang.org/x/vuln/cmd/govulncheck@{{.GOVULNCHECK_VER}} ./...
+    sources:
+    - ./**/*.go
+
+  staticcheck:
+    desc: staticcheck.
+    cmds:
+    - go run honnef.co/go/tools/cmd/staticcheck@{{.STATICCHECK_VER}} -checks=all,-ST1000 ./...
+    sources:
+    - ./**/*.go
+
+  protolint:
+    desc: protolint -fix.
+    cmds:
+    - cmd: go run github.com/yoheimuta/protolint/cmd/protolint@{{.PROTOLINT_VER}} lint -fix .
+      ignore_error: true
+    sources: &protolint_sources
+    - ./**/*.proto
+
+  protolint:check:
+    desc: protolint check.
+    cmds:
+    - go run github.com/yoheimuta/protolint/cmd/protolint@{{.PROTOLINT_VER}} lint .
+    sources: *protolint_sources
+
+  # ===========
+  # DEVELOPMENT
+  # ===========
+
+  generate:
+    desc: go generate
+    cmds:
+    - go generate ./...
+    sources:
+    - ./**/*.go
+
+  vendor:
+    desc: go mod vendor.
+    cmds:
+    - go mod vendor -v
+    sources:
+    - go.mod
+    - go.sum
+    generates:
+    - vendor
+
+  test:
+    desc: go tests ./...
+    cmds:
+    - go test -race -buildvcs -coverprofile={{.TMP_DIR}}/coverage.out -vet=off ./...
+
+  test:cover:
+    desc: tests and display coverage.
+    deps: [ test ]
+    cmds:
+    - go tool cover -html={{.TMP_DIR}}/coverage.out

Taskfile.yaml

@@ -0,0 +1,192 @@
+version: '3'
+
+includes:
+  go:
+    taskfile: ./Taskfile.go.yaml
+
+output: prefixed
+
+silent: true
+interval: 1s
+
+dotenv:
+- ./.env
+
+vars:
+  NEWLINE_EXCLUDE: >-
+    -not -path "./.git/*" 
+    -not -path "./.idea/*" 
+    -not -path "./vendor/*" 
+    -not -path "./tmp/*" 
+    -not -name "*.ico"  
+    -not -name "*.png" 
+    -not -name "*.svg"
+
+tasks:
+  # =======
+  # HELPERS
+  # =======
+
+  all:
+    desc: generate + tidy + lint + test.
+    cmds:
+    - task: generate
+    - task: go:tidy
+    - task: go:lint
+    - task: go:test
+
+  generate:
+    desc: all generators + cs.
+    cmds:
+    - task: sqlc
+    - task: goverter
+    - task: go:generate
+    - task: cs
+
+  cs:
+    desc: go:cs + newline.
+    cmds:
+    - task: go:cs
+    - task: newline
+
+  # ===============
+  # QUALITY CONTROL
+  # ===============
+
+  newline:
+    desc: add newline at end file.
+    cmds:
+    - >-
+      find . 
+      {{.NEWLINE_EXCLUDE}}
+      -type f -exec grep -Iq . {} \; -and -print0 
+      | xargs -0 -n 1 sh -c 'test -z "$(tail -c 1 "$0")" 
+      || (echo "" >> $0 && echo $0)' 
+      || exit 1
+    sources: &newline_sources
+    - ./**/*
+    - exclude: "*.ico"
+    - exclude: "*.png"
+    - exclude: "*.svg"
+
+  newline:check:
+    desc: check newline at end file.
+    cmds:
+    - find .
+      {{.NEWLINE_EXCLUDE}}
+      -type f -exec grep -Iq . {} \; -and -print0
+      | xargs -0 -n 1 sh -c 'test -z "$(tail -c 1 "$0")"
+      || (echo "No new line at end of $0" && exit 1)'
+      || exit 1
+    sources: *newline_sources
+
+  # ===========
+  # DEVELOPMENT
+  # ===========
+
+  dotenv:install:
+    internal: true
+    cmds:
+    - mkdir -p bin
+    - curl -o bin/env https://raw.githubusercontent.com/bashup/dotenv/master/dotenv
+    - chmod +x bin/env
+    status:
+    - test -f bin/env
+
+  dotenv:
+    deps: [ dotenv:install ]
+    desc: fill .env file.
+    vars:
+      UID:
+        sh: id -u
+      GID:
+        sh: id -g
+      GO_VER:
+        sh: go mod edit -json | jq -r .Go
+      GOIMPORTS_LOCAL:
+        sh: go list -m | awk -F/ '{print $1}'
+      ENV_DIST:
+        sh: cat .env.dist|tr '\n' ' '
+      GOPATH:
+        sh: go env GOPATH
+    cmds:
+    - bin/env set GROUP_ID={{.UID}} USER_ID={{.GID}} GO_VER={{.GO_VER}} GOPATH={{.GOPATH}} {{.ENV_DIST}}
+    sources:
+    - .env.dist
+    - Taskfile.yaml
+    generates:
+    - .env
+
+  goverter:
+    desc: go run goverter
+    deps: [ dotenv ]
+    cmds:
+    - go run github.com/jmattheis/goverter/cmd/goverter@{{.GOVERTER_VER}} gen ./...
+    sources:
+    - ./**/*.go
+
+  sqlc:
+    desc: go run sqlc.
+    deps: [ dotenv ]
+    cmds:
+    - go run github.com/sqlc-dev/sqlc/cmd/sqlc@v{{.SQLC_VER}} generate
+    sources:
+    - sqlc.yaml
+    - ./**/sql/**/*
+    - ./**/db/**/*
+
+  # =========
+  # OPERATION
+  # =========
+
+  up:
+    desc: up all services.
+    cmds:
+    - task: postgres:up
+    - task: api:up
+
+  down:
+    desc: docker compose down.
+    deps: [ dotenv ]
+    cmds:
+    - docker compose down -v --remove-orphans
+
+  postgres:build:
+    internal: true
+    desc: docker compose build postgres.
+    deps: [ dotenv ]
+    cmds:
+    - docker compose build postgres
+    sources:
+    - ./**/db/**/*
+    - Dockerfile
+    - docker-compose.yml
+
+  postgres:up:
+    desc: docker compose up postgres.
+    deps: [ dotenv, postgres:build ]
+    cmds:
+    - docker compose up -d --force-recreate postgres
+
+  postgres:push:
+    desc: docker compose push postgres.
+    deps: [ dotenv, postgres:build ]
+    cmds:
+    - docker compose push postgres
+
+  api:build:
+    internal: true
+    desc: docker compose build api image.
+    deps: [ dotenv ]
+    cmds:
+    - docker compose build api
+    sources:
+    - .env
+    - Dockerfile
+    - docker-compose.yml
+
+  api:up:
+    desc: docker compose up api.
+    deps: [ dotenv, api:build ]
+    cmds:
+    - docker compose up -d --force-recreate api

cmd/api/config.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"flag"
+	"time"
+
+	"github.com/kelseyhightower/envconfig"
+)
+
+type Config struct {
+	DSN              string        `envconfig:"DSN" default:"postgresql://postgres:postgres@postgres:5432/postgres?sslmode=disable"`
+	ReconnectTimeout time.Duration `envconfig:"RECONNECT_TIMEOUT" default:"2s"`
+}
+
+func (c *Config) Parse() error {
+	flag.StringVar(&c.DSN, "DSN", "", "postgresql DSN")
+	flag.Parse()
+
+	if err := envconfig.Process("", c); err != nil {
+		return err
+	}
+
+	return nil
+}

cmd/api/main.go

@@ -0,0 +1,113 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+
+	stringunpack "git.grachevko.ru/grachevko/h/string-unpack"
+
+	"github.com/gin-gonic/gin"
+	"github.com/prometheus/client_golang/prometheus"
+	collector "github.com/prometheus/client_golang/prometheus/collectors/version"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
+)
+
+func main() {
+	logger, _ := zap.NewProduction()
+	defer func(logger *zap.Logger) {
+		_ = logger.Sync()
+	}(logger) // flushes buffer, if any
+
+	cfg := Config{}
+	if err := cfg.Parse(); err != nil {
+		logger.Fatal("config parse", zap.Error(err))
+	}
+
+	ctx := context.Background()
+
+	ctx, stop := signal.NotifyContext(ctx, syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	var metricServer *http.Server
+	{ // Metrics
+		prometheus.MustRegister(collector.NewCollector("unpack"))
+		mux := http.NewServeMux()
+		mux.Handle("/metrics", promhttp.Handler())
+		metricServer = &http.Server{
+			Handler: mux,
+			Addr:    ":8089",
+		}
+
+		go func() {
+			if err := metricServer.ListenAndServe(); err != nil {
+				logger.Error("metric server failed", zap.Error(err))
+			}
+		}()
+	} // Metrics
+
+pgconn:
+	conn, err := pgx.Connect(ctx, cfg.DSN)
+	if err != nil {
+		logger.Error("pgx", zap.Error(err))
+
+		logger.Info("Wait before reconnect", zap.Duration("after", cfg.ReconnectTimeout))
+		<-time.After(cfg.ReconnectTimeout)
+		logger.Info("Retrying connection")
+		goto pgconn
+	}
+	defer func(conn *pgx.Conn, ctx context.Context) {
+		if err = conn.Close(ctx); err != nil {
+			logger.Error("pgx close", zap.Error(err))
+		}
+	}(conn, ctx)
+
+	var httpServer *http.Server
+	{ // Http
+		r := gin.Default()
+
+		stringunpack.Setup(ctx, logger, r.Group("unpack"), conn)
+
+		httpServer = &http.Server{
+			Addr:    ":8080",
+			Handler: r,
+		}
+
+		go func() {
+			if err := httpServer.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+				logger.Error("http server failed", zap.Error(err))
+			}
+		}()
+	} // Http
+
+	// Listen for the interrupt signal.
+	<-ctx.Done()
+
+	{ // Graceful shutdown
+		// Restore default behavior on the interrupt signal and notify user of shutdown.
+		stop()
+		logger.Info("shutting down gracefully, press Ctrl+C again to force")
+
+		// The context is used to inform the server it has 5 seconds to finish
+		// the request it is currently handling
+		ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+		defer cancel()
+
+		g, ctx := errgroup.WithContext(ctx)
+		g.Go(func() error { return metricServer.Shutdown(ctx) })
+		g.Go(func() error { return httpServer.Shutdown(ctx) })
+
+		if err := g.Wait(); err != nil {
+			logger.Error("graceful shutdown failed", zap.Error(err))
+		}
+	} // Graceful shutdown
+
+	logger.Info("Server exiting")
+}

cmd/sort-cli/config.go

@@ -2,8 +2,6 @@ package main
 
 import "flag"
 
-const stdin = "-"
-
 type Config struct {
 	Key     int
 	Numeric bool
@@ -23,6 +21,6 @@ func (c *Config) ParseFlags() {
 	c.Sources = flag.Args()
 
 	if len(c.Sources) == 0 {
-		c.Sources = []string{stdin}
+		c.Sources = []string{"-"}
 	}
 }

cmd/sort-cli/main.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"os"
+
+	sortcli "git.grachevko.ru/grachevko/h/sort-cli"
 )
 
 func main() {
@@ -18,8 +20,8 @@ func run() string {
 	cfg := &Config{}
 	cfg.ParseFlags()
 
-	lines := content{}
+	lines := sortcli.Content{}
-	lines.Load(open(cfg.Sources))
+	lines.Load(sortcli.Open(cfg.Sources))
 
 	if cfg.Unique {
 		lines.Uniques()

cmd/sort-cli/main_test.go

@@ -2,10 +2,11 @@ package main
 
 import (
 	"flag"
-	"github.com/stretchr/testify/assert"
 	"os"
 	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestFlags(t *testing.T) {
@@ -20,22 +21,26 @@ func TestFlags(t *testing.T) {
 		ExpectedExit   int
 		ExpectedOutput string
 	}{
-		{"No flags",
+		{
+			"No flags",
 			[]string{"testdata/first"},
 			0,
 			"alabama barcelona\nbarcelona california\ncalifornia denver\ncalifornia denver\nамур брянск\nбелгород волгоград\nволгоград геленджик",
 		},
-		{"Reverse",
+		{
+			"Reverse",
 			[]string{"-r", "testdata/first"},
 			0,
 			"волгоград геленджик\nбелгород волгоград\nамур брянск\ncalifornia denver\ncalifornia denver\nbarcelona california\nalabama barcelona",
 		},
-		{"Unique",
+		{
+			"Unique",
 			[]string{"-u", "testdata/first"},
 			0,
 			"alabama barcelona\nbarcelona california\ncalifornia denver\nамур брянск\nбелгород волгоград\nволгоград геленджик",
 		},
-		{"Column 2",
+		{
+			"Column 2",
 			[]string{"-k=2", "testdata/first"},
 			0,
 			"alabama barcelona\nbarcelona california\ncalifornia denver\ncalifornia denver\nамур брянск\nбелгород волгоград\nволгоград геленджик",

docker-compose.yml

@@ -0,0 +1,41 @@
+services:
+  postgres:
+    build:
+      target: postgres
+      context: .
+      args: &args
+        AIR_VER: ${AIR_VER}
+        ALPINE_VER: ${ALPINE_VER}
+        GO_VER: ${GO_VER}
+        POSTGRES_VER: ${POSTGRES_VER}
+    image: harbor.grachevko.ru/grachevko/h-skills/postgres:dev
+    labels:
+      ru.grachevko.dhu: 'postgres.h-skills.local'
+    environment:
+      POSTGRES_DB: postgres
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      PGDATABASE: postgres
+      PGUSER: postgres
+      PGPASSWORD: postgres
+    volumes:
+    - type: tmpfs
+      target: /var/lib/postgresql/data
+      tmpfs:
+        size: 4294967296
+
+  api:
+    build:
+      target: golang
+      args: *args
+    command: air --build.cmd "go build -o ./tmp/api ./cmd/api/" --build.bin "./tmp/api"
+    labels:
+      ru.grachevko.dhu: 'api.h-skills.local'
+    environment:
+      GOPATH: ${GOPATH}
+    working_dir: /app
+    volumes:
+    - ./:/app
+    - ${GOPATH}:${GOPATH}
+    - ${HOME}/.cache/go-build:/.cache/go-build
+    user: ${USER_ID}:${GROUP_ID}

go.mod

@@ -0,0 +1,53 @@
+module git.grachevko.ru/grachevko/h
+
+go 1.22.3
+
+require (
+	github.com/gin-gonic/gin v1.10.0
+	github.com/jackc/pgx/v5 v5.5.5
+	github.com/kelseyhightower/envconfig v1.4.0
+	github.com/prometheus/client_golang v1.19.0
+	github.com/stretchr/testify v1.9.0
+	go.uber.org/zap v1.27.0
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842
+	golang.org/x/sync v0.7.0
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/bytedance/sonic v1.11.6 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_model v0.6.0 // indirect
+	github.com/prometheus/common v0.53.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	go.uber.org/multierr v1.10.0 // indirect
+	golang.org/x/arch v0.8.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/text v0.15.0 // indirect
+	google.golang.org/protobuf v1.34.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,126 @@
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0=
+github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4=
+github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM=
+github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
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lru/Makefile

@@ -1,48 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: audit
-audit:
-	go mod verify
-	go vet ./...
-	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000 ./...
-	go run golang.org/x/vuln/cmd/govulncheck@latest ./...
-	go test -race -buildvcs -vet=off ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -v -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -v -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

lru/go.mod

@@ -1,11 +0,0 @@
-module lru
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

lru/go.sum

@@ -1,10 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

lru/lru_test.go

@@ -2,9 +2,10 @@ package lru
 
 import (
 	"fmt"
-	"github.com/stretchr/testify/assert"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestTtl(t *testing.T) {

merge-channel/Makefile

@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

merge-channel/go.mod

@@ -1,11 +0,0 @@
-module merge-channel
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

merge-channel/go.sum

@@ -1,10 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

merge-channel/main.go

@@ -1,11 +1,11 @@
-package main
+package mergechannel
 
 import (
 	"errors"
 	"sync"
 )
 
-var InsufficientChannelsErr = errors.New("channels count must be >2")
+var ErrInsufficientChannels = errors.New("channels count must be >2")
 
 func merge[T any](channels ...<-chan T) (<-chan T, error) {
 	out := make(chan T)
@@ -13,7 +13,7 @@ func merge[T any](channels ...<-chan T) (<-chan T, error) {
 	if len(channels) < 2 {
 		close(out)
 
-		return out, InsufficientChannelsErr
+		return out, ErrInsufficientChannels
 	}
 
 	var wg sync.WaitGroup

merge-channel/main_test.go

@@ -1,4 +1,4 @@
-package main
+package mergechannel
 
 import (
 	"testing"
@@ -32,5 +32,5 @@ func TestInsufficient(t *testing.T) {
 	a := make(chan int)
 
 	_, err := merge(a)
-	assert.Equal(t, err, InsufficientChannelsErr)
+	assert.Equal(t, err, ErrInsufficientChannels)
 }

pipeline/Makefile

@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

pipeline/go.mod

@@ -1,11 +0,0 @@
-module pipeline
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

pipeline/go.sum

@@ -1,10 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pipeline/pipeline.go

@@ -1,4 +1,4 @@
-package main
+package pipeline
 
 func Pipe[In any, Out any](in <-chan In, pipe func(In) Out) <-chan Out {
 	out := make(chan Out)

pipeline/pipeline_test.go

@@ -1,4 +1,4 @@
-package main
+package pipeline
 
 import (
 	"testing"

semaphore/Makefile

@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

semaphore/go.mod

@@ -1,3 +0,0 @@
-module semaphore
-
-go 1.21.6

semaphore/semaphore.go

@@ -1,4 +1,4 @@
-package main
+package semaphore
 
 import (
 	"context"

semaphore/semaphore_test.go

@@ -1,9 +1,8 @@
-package main
+package semaphore
 
 import (
 	"testing"
 )
 
 func TestPipe(t *testing.T) {
-
 }

sort-cli/Makefile

@@ -1,50 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: tidy audit test/cover
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: audit
-audit:
-	go mod verify
-	go vet ./...
-	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000 ./...
-	go run golang.org/x/vuln/cmd/govulncheck@latest ./...
-	go test -race -buildvcs -vet=off ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -v -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -v -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

sort-cli/content.go

@@ -1,20 +1,21 @@
-package main
+package sortcli
 
 import (
 	"bufio"
 	"errors"
-	"golang.org/x/exp/slices"
 	"io"
 	"log"
 	"strings"
+
+	"golang.org/x/exp/slices"
 )
 
 // NL New line constant
 const NL = "\n"
 
-type content [][]byte
+type Content [][]byte
 
-func (c *content) Sort(reverse bool) {
+func (c *Content) Sort(reverse bool) {
 	slices.SortFunc(*c, func(a, b []byte) int {
 		if reverse {
 			a, b = b, a
@@ -24,10 +25,10 @@ func (c *content) Sort(reverse bool) {
 	})
 }
 
-func (c *content) Uniques() {
+func (c *Content) Uniques() {
 	m := make(map[string]struct{}, len(*c))
 
-	*c = slices.DeleteFunc[content, []byte](*c, func(line []byte) bool {
+	*c = slices.DeleteFunc[Content, []byte](*c, func(line []byte) bool {
 		if _, ok := m[string(line)]; !ok {
 			m[string(line)] = struct{}{}
 
@@ -38,7 +39,7 @@ func (c *content) Uniques() {
 	})
 }
 
-func (c *content) String() string {
+func (c *Content) String() string {
 	lines := *c
 
 	var n int
@@ -63,7 +64,7 @@ func (c *content) String() string {
 	return sb.String()
 }
 
-func (c *content) Load(r io.Reader) {
+func (c *Content) Load(r io.Reader) {
 	br := bufio.NewReader(r)
 
 	for {

sort-cli/content_test.go

@@ -1,9 +1,10 @@
-package main
+package sortcli
 
 import (
-	"github.com/stretchr/testify/assert"
 	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 const input = `
@@ -15,7 +16,7 @@ Africa
 `
 
 func TestLoad(t *testing.T) {
-	c := &content{}
+	c := &Content{}
 	c.Load(strings.NewReader(input))
 
 	assert.Equal(t, input, c.String())
@@ -27,7 +28,8 @@ func TestUnique(t *testing.T) {
 		Content  string
 		Expected string
 	}{
-		{"Unique",
+		{
+			"Unique",
 			input,
 			`
 Zimbabwe
@@ -40,7 +42,7 @@ America`,
 		tc := tc
 
 		t.Run(tc.Name, func(t *testing.T) {
-			c := &content{}
+			c := &Content{}
 			c.Load(strings.NewReader(tc.Content))
 
 			c.Uniques()

sort-cli/go.mod

@@ -1,14 +0,0 @@
-module sort-cli
-
-go 1.21.6
-
-require (
-	github.com/stretchr/testify v1.8.4
-	golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3
-)
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

sort-cli/go.sum

@@ -1,12 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3 h1:hNQpMuAJe5CtcUqCXaWga3FHu+kQvCqcsoVaQgSV60o=
-golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3/go.mod h1:idGWGoKP1toJGkd5/ig9ZLuPcZBC3ewk7SzmH0uou08=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

sort-cli/loader.go

@@ -1,4 +1,4 @@
-package main
+package sortcli
 
 import (
 	"io"
@@ -6,13 +6,13 @@ import (
 	"os"
 )
 
-func open(sources []string) io.Reader {
+func Open(sources []string) io.Reader {
 	rs := make([]io.Reader, 0, len(sources))
 
 	for _, source := range sources {
 		var r io.Reader
 
-		if source == stdin {
+		if source == "-" {
 			r = os.Stdin
 		} else {
 			if _, err := os.Stat(source); err != nil {

sqlc.yaml

@@ -0,0 +1,14 @@
+version: "2"
+sql:
+- engine: "postgresql"
+  queries: "string-unpack/internal/sql/"
+  schema: "string-unpack/internal/db/schema.sql"
+  gen:
+    go:
+      out: "string-unpack/internal/sql"
+      sql_package: "pgx/v5"
+      emit_db_tags: true
+      emit_interface: true
+      emit_json_tags: true
+      emit_methods_with_db_argument: false
+      query_parameter_limit: 0

string-unpack/internal/db/schema.sql

@@ -0,0 +1,10 @@
+CREATE EXTENSION IF NOT EXISTS pgcrypto;
+
+CREATE TABLE unpack_history
+(
+    id         uuid        default gen_random_uuid() primary key,
+    input      text NOT NULL,
+    result     text NOT NULL,
+    created_at timestamptz DEFAULT NOW()
+)
+;

string-unpack/internal/sql/db.go

@@ -0,0 +1,32 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.26.0
+
+package sql
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
+)
+
+type DBTX interface {
+	Exec(context.Context, string, ...interface{}) (pgconn.CommandTag, error)
+	Query(context.Context, string, ...interface{}) (pgx.Rows, error)
+	QueryRow(context.Context, string, ...interface{}) pgx.Row
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+func (q *Queries) WithTx(tx pgx.Tx) *Queries {
+	return &Queries{
+		db: tx,
+	}
+}

string-unpack/internal/sql/insert.sql

@@ -0,0 +1,9 @@
+-- name: Insert :one
+INSERT INTO unpack_history (input, result)
+VALUES (@input, @result)
+RETURNING
+    id,
+    input,
+    result,
+    created_at
+;

string-unpack/internal/sql/insert.sql.go

@@ -0,0 +1,37 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.26.0
+// source: insert.sql
+
+package sql
+
+import (
+	"context"
+)
+
+const insert = `-- name: Insert :one
+INSERT INTO unpack_history (input, result)
+VALUES ($1, $2)
+RETURNING
+    id,
+    input,
+    result,
+    created_at
+`
+
+type InsertParams struct {
+	Input  string `db:"input" json:"input"`
+	Result string `db:"result" json:"result"`
+}
+
+func (q *Queries) Insert(ctx context.Context, arg InsertParams) (UnpackHistory, error) {
+	row := q.db.QueryRow(ctx, insert, arg.Input, arg.Result)
+	var i UnpackHistory
+	err := row.Scan(
+		&i.ID,
+		&i.Input,
+		&i.Result,
+		&i.CreatedAt,
+	)
+	return i, err
+}

string-unpack/internal/sql/latest.sql

@@ -0,0 +1,9 @@
+-- name: Latest :many
+SELECT id,
+       input,
+       result,
+       created_at
+FROM unpack_history
+ORDER BY created_at DESC
+LIMIT 15
+;

string-unpack/internal/sql/latest.sql.go

@@ -0,0 +1,45 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.26.0
+// source: latest.sql
+
+package sql
+
+import (
+	"context"
+)
+
+const latest = `-- name: Latest :many
+SELECT id,
+       input,
+       result,
+       created_at
+FROM unpack_history
+ORDER BY created_at DESC
+LIMIT 15
+`
+
+func (q *Queries) Latest(ctx context.Context) ([]UnpackHistory, error) {
+	rows, err := q.db.Query(ctx, latest)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []UnpackHistory
+	for rows.Next() {
+		var i UnpackHistory
+		if err := rows.Scan(
+			&i.ID,
+			&i.Input,
+			&i.Result,
+			&i.CreatedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}

string-unpack/internal/sql/models.go

@@ -0,0 +1,16 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.26.0
+
+package sql
+
+import (
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+type UnpackHistory struct {
+	ID        pgtype.UUID        `db:"id" json:"id"`
+	Input     string             `db:"input" json:"input"`
+	Result    string             `db:"result" json:"result"`
+	CreatedAt pgtype.Timestamptz `db:"created_at" json:"created_at"`
+}

string-unpack/internal/sql/querier.go

@@ -0,0 +1,16 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.26.0
+
+package sql
+
+import (
+	"context"
+)
+
+type Querier interface {
+	Insert(ctx context.Context, arg InsertParams) (UnpackHistory, error)
+	Latest(ctx context.Context) ([]UnpackHistory, error)
+}
+
+var _ Querier = (*Queries)(nil)

string-unpack/server.go

@@ -0,0 +1,78 @@
+package stringunpack
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"git.grachevko.ru/grachevko/h/string-unpack/internal/sql"
+	"github.com/gin-gonic/gin"
+	"github.com/jackc/pgx/v5"
+	"go.uber.org/zap"
+)
+
+var queries sql.Querier
+
+func Setup(ctx context.Context, logger *zap.Logger, r *gin.RouterGroup, conn *pgx.Conn) {
+	if queries != nil {
+		panic("Setup must call only once")
+	}
+
+	queries = sql.New(conn)
+
+	unpack := func(input string) (r string, err error) {
+		r, err = Unpack(input)
+
+		{ // history
+			result := r
+			if err != nil {
+				result = fmt.Sprintf("err: %s", err.Error())
+			}
+			_, err := queries.Insert(ctx, sql.InsertParams{
+				Input:  input,
+				Result: result,
+			})
+			if err != nil {
+				logger.Error("pg insert", zap.Error(err))
+			}
+		} // history
+
+		return
+	}
+
+	r.GET("history", func(c *gin.Context) {
+		latest, err := queries.Latest(ctx)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{
+				"err": err.Error(),
+			})
+
+			return
+		}
+
+		c.JSON(http.StatusOK, latest)
+	})
+
+	r.GET(":s", func(c *gin.Context) {
+		s := c.Param("s")
+
+		result, err := unpack(s)
+		if errors.Is(err, ErrIncorrectString) {
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"err": err.Error(),
+			})
+
+			return
+		}
+		if err != nil {
+			logger.Error("unpack", zap.Error(err))
+
+			c.AbortWithStatus(http.StatusInternalServerError)
+		}
+
+		c.JSON(http.StatusOK, gin.H{
+			"result": result,
+		})
+	})
+}

string-unpack/unpack.go

@@ -0,0 +1,54 @@
+package stringunpack
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+)
+
+var ErrIncorrectString = errors.New("incorrect string")
+
+func Unpack(s string) (string, error) {
+	if s == "" {
+		return "", nil
+	}
+
+	var sb strings.Builder
+	sb.Grow(len(s))
+
+	var curSymbol rune
+	for _, r := range s {
+		isNumber := false
+		number := 0
+		if n, err := strconv.Atoi(string(r)); err == nil {
+			number = n
+			isNumber = true
+		}
+
+		if curSymbol == rune(0) {
+			switch {
+			case isNumber:
+				return "", ErrIncorrectString
+			case !isNumber:
+				curSymbol = r
+			}
+		} else {
+			switch {
+			case !isNumber:
+				sb.WriteRune(curSymbol)
+				curSymbol = r
+			case isNumber:
+				for i := 0; i < number; i++ {
+					sb.WriteRune(curSymbol)
+				}
+				curSymbol = rune(0)
+			}
+		}
+	}
+
+	if curSymbol != rune(0) {
+		sb.WriteRune(curSymbol)
+	}
+
+	return sb.String(), nil
+}

string-unpack/unpack_test.go

@@ -0,0 +1,44 @@
+package stringunpack_test
+
+import (
+	"testing"
+
+	stringunpack "git.grachevko.ru/grachevko/h/string-unpack"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUnpack(t *testing.T) {
+	testcases := []struct {
+		input    string
+		expected string
+	}{
+		{input: "a4bc2d5e", expected: "aaaabccddddde"},
+		{input: "abcd", expected: "abcd"},
+		{input: "aaa0b", expected: "aab"},
+		{input: "", expected: ""},
+		{input: "d\n5abc", expected: "d\n\n\n\n\nabc"},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.input, func(t *testing.T) {
+			result, err := stringunpack.Unpack(tc.input)
+			assert.NoError(t, err)
+			assert.Equal(t, tc.expected, result)
+		})
+	}
+}
+
+func TestUnpackIncorrectString(t *testing.T) {
+	testcases := []string{
+		"3abc",
+		"45",
+		"aaa10b",
+	}
+
+	for _, input := range testcases {
+		t.Run(input, func(t *testing.T) {
+			_, err := stringunpack.Unpack(input)
+			assert.Equal(t, stringunpack.ErrIncorrectString, err)
+		})
+	}
+}

unique-chars/Makefile

@@ -1,48 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: audit
-audit:
-	go mod verify
-	go vet ./...
-	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000 ./...
-	go run golang.org/x/vuln/cmd/govulncheck@latest ./...
-	go test -race -buildvcs -vet=off ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -v -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -v -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

unique-chars/go.mod

@@ -1,10 +0,0 @@
-module uniqueschars
-
-go 1.21.6
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

unique-chars/go.sum

@@ -1,9 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

unique-chars/uniquechars_test.go

@@ -1,8 +1,9 @@
 package uniqueschars
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestUnique(t *testing.T) {

worker-pool/Makefile

@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out

worker-pool/go.mod

@@ -1,11 +0,0 @@
-module worker-pool
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

worker-pool/workerpool.go

@@ -1,4 +1,4 @@
-package main
+package workerpool
 
 import (
 	"fmt"

worker-pool/workerpool_test.go

@@ -1,4 +1,4 @@
-package main
+package workerpool
 
 import (
 	"fmt"