lru: init

.env.dist

@@ -1,7 +0,0 @@
-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

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

.golangci.yml

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

Dockerfile

@@ -1,20 +0,0 @@
-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

@@ -1,129 +0,0 @@
-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

@@ -1,192 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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

@@ -1,113 +0,0 @@
-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

@@ -1,26 +0,0 @@
-package main
-
-import "flag"
-
-type Config struct {
-	Key     int
-	Numeric bool
-	Reverse bool
-	Unique  bool
-	Sources []string
-}
-
-func (c *Config) ParseFlags() {
-	flag.IntVar(&c.Key, "k", 0, "sort via column")
-	flag.BoolVar(&c.Numeric, "n", false, "compare according to string numerical value")
-	flag.BoolVar(&c.Reverse, "r", false, "reverse the result of comparisons")
-	flag.BoolVar(&c.Unique, "u", false, "output only the first of an equal run")
-
-	flag.Parse()
-
-	c.Sources = flag.Args()
-
-	if len(c.Sources) == 0 {
-		c.Sources = []string{"-"}
-	}
-}

cmd/sort-cli/main.go

@@ -1,33 +0,0 @@
-package main
-
-import (
-	"os"
-
-	sortcli "git.grachevko.ru/grachevko/h/sort-cli"
-)
-
-func main() {
-	result := run()
-
-	if _, err := os.Stdout.WriteString(result); err != nil {
-		panic(err)
-	}
-
-	os.Exit(0)
-}
-
-func run() string {
-	cfg := &Config{}
-	cfg.ParseFlags()
-
-	lines := sortcli.Content{}
-	lines.Load(sortcli.Open(cfg.Sources))
-
-	if cfg.Unique {
-		lines.Uniques()
-	}
-
-	lines.Sort(cfg.Reverse)
-
-	return lines.String()
-}

docker-compose.yml

@@ -1,41 +0,0 @@
-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

@@ -1,53 +0,0 @@
-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

@@ -1,126 +0,0 @@
-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=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
-github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
-github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
-github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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lru/Makefile

@@ -0,0 +1,48 @@
+.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

@@ -0,0 +1,11 @@
+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

@@ -0,0 +1,10 @@
+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.go

@@ -12,7 +12,7 @@ type LRU[T any] struct {
 }
 type item[T any] struct {
 	key   string
-	value T
+	value *T
 	eol   time.Time
 }
 
@@ -30,7 +30,7 @@ func (lru *LRU[T]) Set(key string, value T, ttl time.Duration) (evicted bool) {
 	if element, ok := lru.items[key]; ok {
 		lru.queue.MoveToFront(element)
 		item := element.Value.(*item[T])
-		item.value = value
+		item.value = &value
 		item.eol = eol
 
 		return
@@ -43,7 +43,7 @@ func (lru *LRU[T]) Set(key string, value T, ttl time.Duration) (evicted bool) {
 
 	item := &item[T]{
 		key:   key,
-		value: value,
+		value: &value,
 		eol:   eol,
 	}
 
@@ -68,7 +68,7 @@ func (lru *LRU[T]) Get(name string) (value T, ok bool) {
 
 	lru.queue.MoveToFront(element)
 
-	return item.value, true
+	return *item.value, true
 }
 
 func (lru *LRU[T]) evict() {

lru/lru_test.go

@@ -1,11 +1,9 @@
 package lru
 
 import (
-	"fmt"
+	"github.com/stretchr/testify/assert"
 	"testing"
 	"time"
-
-	"github.com/stretchr/testify/assert"
 )
 
 func TestTtl(t *testing.T) {
@@ -41,7 +39,7 @@ func TestEvictExpired(t *testing.T) {
 	assert.False(t, cache.Set("first", 1, 1000*time.Millisecond))
 	assert.False(t, cache.Set("second", 2, 100*time.Millisecond))
 
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(200*time.Millisecond)
 
 	assert.True(t, cache.Set("third", 3, 1000*time.Millisecond))
 
@@ -60,7 +58,7 @@ func TestSetExisted(t *testing.T) {
 	assert.False(t, cache.Set("first", 1, 200*time.Millisecond))
 	assert.False(t, cache.Set("second", 2, 500*time.Millisecond))
 
-	time.Sleep(100 * time.Millisecond)
+	time.Sleep(100*time.Millisecond)
 
 	assert.False(t, cache.Set("first", 11, 1000*time.Millisecond))
 	assert.True(t, cache.Set("third", 3, 1000*time.Millisecond))
@@ -74,27 +72,7 @@ func TestSetExisted(t *testing.T) {
 	assert.False(t, ok)
 }
 
-func TestDummy(t *testing.T) { // for coverage 100% coverage
+func TestDummy(t *testing.T)  { // for coverage 100% coverage
 	cache := New[int](0)
 	cache.evict()
 }
-
-func Benchmark(b *testing.B) {
-	cache := New[string](10)
-	ttl := 1000 * time.Millisecond
-
-	b.Run("Set", func(b *testing.B) {
-		for i := 0; i < b.N; i++ {
-			cache.Set(fmt.Sprintf("item:%d", i), fmt.Sprintf("item:%d", i), ttl)
-		}
-	})
-
-	b.Run("Get", func(b *testing.B) {
-		for i := 0; i < b.N; i++ {
-			value, ok := cache.Get(fmt.Sprintf("item:%d", i))
-			if ok {
-				_ = value
-			}
-		}
-	})
-}

merge-channel/main.go

@@ -1,38 +0,0 @@
-package mergechannel
-
-import (
-	"errors"
-	"sync"
-)
-
-var ErrInsufficientChannels = errors.New("channels count must be >2")
-
-func merge[T any](channels ...<-chan T) (<-chan T, error) {
-	out := make(chan T)
-
-	if len(channels) < 2 {
-		close(out)
-
-		return out, ErrInsufficientChannels
-	}
-
-	var wg sync.WaitGroup
-	wg.Add(len(channels))
-
-	for _, c := range channels {
-		go func(channel <-chan T) {
-			defer wg.Done()
-
-			for v := range channel {
-				out <- v
-			}
-		}(c)
-	}
-
-	go func() {
-		wg.Wait()
-		close(out)
-	}()
-
-	return out, nil
-}

merge-channel/main_test.go

@@ -1,36 +0,0 @@
-package mergechannel
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestMerge(t *testing.T) {
-	a := make(chan int, 5)
-	b := make(chan int, 5)
-
-	for i := 0; i < 5; i++ {
-		a <- i
-		b <- i
-	}
-
-	merged, err := merge(a, b)
-	assert.Nil(t, err)
-
-	close(a)
-	close(b)
-
-	sum := 0
-	for v := range merged {
-		sum += v
-	}
-	assert.Equal(t, sum, 20)
-}
-
-func TestInsufficient(t *testing.T) {
-	a := make(chan int)
-
-	_, err := merge(a)
-	assert.Equal(t, err, ErrInsufficientChannels)
-}

pipeline/pipeline.go

@@ -1,14 +0,0 @@
-package pipeline
-
-func Pipe[In any, Out any](in <-chan In, pipe func(In) Out) <-chan Out {
-	out := make(chan Out)
-
-	go func() {
-		for n := range in {
-			out <- pipe(n)
-		}
-		close(out)
-	}()
-
-	return out
-}

pipeline/pipeline_test.go

@@ -1,21 +0,0 @@
-package pipeline
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestPipe(t *testing.T) {
-	a := make(chan int, 1)
-
-	pipe := func(in int) int {
-		return in * 2
-	}
-
-	b := Pipe(a, pipe)
-	a <- 5
-	close(a)
-
-	assert.Equal(t, 10, <-b)
-}

semaphore/semaphore.go

@@ -1,63 +0,0 @@
-package semaphore
-
-import (
-	"context"
-	"sync/atomic"
-	"time"
-)
-
-type Semaphore interface {
-	Acquire(ctx context.Context) error
-	Release()
-}
-
-// ChanSemaphore implementation
-type ChanSemaphore struct {
-	C chan struct{}
-}
-
-func (s *ChanSemaphore) Acquire(ctx context.Context) error {
-	select {
-	case s.C <- struct{}{}:
-		return nil
-	case <-ctx.Done():
-		return ctx.Err()
-	}
-}
-
-func (s *ChanSemaphore) Release() {
-	<-s.C
-}
-
-// AtomicSemaphore implementation
-type AtomicSemaphore struct {
-	acquired atomic.Bool
-	TryDelay time.Duration
-}
-
-func (s *AtomicSemaphore) Acquire(ctx context.Context) error {
-	if s.acquired.CompareAndSwap(false, true) {
-		return nil
-	}
-
-	return s.slowAcquire(ctx)
-}
-
-func (s *AtomicSemaphore) slowAcquire(ctx context.Context) error {
-	ticker := time.NewTicker(s.TryDelay)
-
-	for {
-		select {
-		case <-ctx.Done():
-			return ctx.Err()
-		case <-ticker.C:
-			if s.acquired.CompareAndSwap(false, true) {
-				return nil
-			}
-		}
-	}
-}
-
-func (s *AtomicSemaphore) Release() {
-	s.acquired.Store(false)
-}

semaphore/semaphore_test.go

@@ -1,8 +0,0 @@
-package semaphore
-
-import (
-	"testing"
-)
-
-func TestPipe(t *testing.T) {
-}

sort-cli/content.go

@@ -1,84 +0,0 @@
-package sortcli
-
-import (
-	"bufio"
-	"errors"
-	"io"
-	"log"
-	"strings"
-
-	"golang.org/x/exp/slices"
-)
-
-// NL New line constant
-const NL = "\n"
-
-type Content [][]byte
-
-func (c *Content) Sort(reverse bool) {
-	slices.SortFunc(*c, func(a, b []byte) int {
-		if reverse {
-			a, b = b, a
-		}
-
-		return slices.Compare(a, b)
-	})
-}
-
-func (c *Content) Uniques() {
-	m := make(map[string]struct{}, len(*c))
-
-	*c = slices.DeleteFunc[Content, []byte](*c, func(line []byte) bool {
-		if _, ok := m[string(line)]; !ok {
-			m[string(line)] = struct{}{}
-
-			return false
-		}
-
-		return true
-	})
-}
-
-func (c *Content) String() string {
-	lines := *c
-
-	var n int
-	for _, line := range lines {
-		n += len(line)
-	}
-	n += len(lines) * len(NL)
-
-	var sb strings.Builder
-	sb.Grow(n)
-
-	for i, line := range lines {
-		if i > 0 {
-			sb.WriteString(NL)
-		}
-
-		for _, rn := range line {
-			sb.WriteByte(rn)
-		}
-	}
-
-	return sb.String()
-}
-
-func (c *Content) Load(r io.Reader) {
-	br := bufio.NewReader(r)
-
-	for {
-		line, _, err := br.ReadLine()
-		if err != nil {
-			if errors.Is(io.EOF, err) {
-				*c = append(*c, line)
-
-				break
-			}
-
-			log.Fatalf("can't read line: %s", err)
-		}
-
-		*c = append(*c, line)
-	}
-}

sort-cli/content_test.go

@@ -1,53 +0,0 @@
-package sortcli
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-const input = `
-Zimbabwe
-Africa
-America
-Zimbabwe
-Africa
-`
-
-func TestLoad(t *testing.T) {
-	c := &Content{}
-	c.Load(strings.NewReader(input))
-
-	assert.Equal(t, input, c.String())
-}
-
-func TestUnique(t *testing.T) {
-	cases := []struct {
-		Name     string
-		Content  string
-		Expected string
-	}{
-		{
-			"Unique",
-			input,
-			`
-Zimbabwe
-Africa
-America`,
-		},
-	}
-
-	for _, tc := range cases {
-		tc := tc
-
-		t.Run(tc.Name, func(t *testing.T) {
-			c := &Content{}
-			c.Load(strings.NewReader(tc.Content))
-
-			c.Uniques()
-
-			assert.Equal(t, tc.Expected, c.String())
-		})
-	}
-}

sort-cli/go.mod

@@ -0,0 +1,14 @@
+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

@@ -0,0 +1,12 @@
+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

@@ -1,34 +0,0 @@
-package sortcli
-
-import (
-	"io"
-	"log"
-	"os"
-)
-
-func Open(sources []string) io.Reader {
-	rs := make([]io.Reader, 0, len(sources))
-
-	for _, source := range sources {
-		var r io.Reader
-
-		if source == "-" {
-			r = os.Stdin
-		} else {
-			if _, err := os.Stat(source); err != nil {
-				log.Fatalf("file not exists: %s", source)
-			}
-
-			f, err := os.Open(source)
-			if err != nil {
-				log.Fatalf("file open file: %s", err)
-			}
-
-			r = f
-		}
-
-		rs = append(rs, r)
-	}
-
-	return io.MultiReader(rs...)
-}

sort-cli/main.go

@@ -0,0 +1,211 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"golang.org/x/exp/maps"
+	"io"
+	"log"
+	"os"
+	"sort"
+	"strings"
+)
+
+type Cfg struct {
+	Key     int
+	Numeric bool
+	Reverse bool
+	Unique  bool
+}
+
+func main() {
+	fmt.Print(run())
+
+	os.Exit(0)
+}
+
+func run() string {
+	var c Cfg
+
+	flag.IntVar(&c.Key, "k", 0, "sort via column")
+	flag.BoolVar(&c.Numeric, "n", false, "compare according to string numerical value")
+	flag.BoolVar(&c.Reverse, "r", false, "reverse the result of comparisons")
+	flag.BoolVar(&c.Unique, "u", false, "output only the first of an equal run")
+
+	flag.Parse()
+
+	return doSort(&c, flag.Args())
+}
+
+func doSort(cfg *Cfg, sources []string) string {
+	r := splitLines(load(sources), []byte("\n"), cfg.Key)
+
+	if cfg.Unique {
+		r = uniques(r)
+	}
+
+	rs := &Rows{s: r, cfg: cfg}
+	sort.Sort(rs)
+
+	return rs.String()
+}
+
+type Row struct {
+	Line   []byte
+	Column []byte
+}
+
+type Rows struct {
+	s   []*Row
+	cfg *Cfg
+}
+
+func (p *Rows) Len() int { return len(p.s) }
+func (p *Rows) Less(i, j int) bool {
+	s := p.s
+
+	lr := s[i]
+	rr := s[j]
+
+	if p.cfg.Reverse {
+		lr, rr = rr, lr
+	}
+
+	var l, r []rune
+
+	if p.cfg.Key == 0 {
+		l, r = bytes.Runes(lr.Line), bytes.Runes(rr.Line)
+	} else {
+		l, r = bytes.Runes(lr.Column), bytes.Runes(rr.Column)
+	}
+
+	ln := len(l)
+	rn := len(r)
+
+	for i := 0; i < min(ln, rn); i++ {
+		if l[i] == r[i] {
+			continue
+		}
+
+		return l[i] < r[i]
+	}
+
+	return ln < rn
+}
+
+func (p *Rows) Swap(i, j int) {
+	s := p.s
+
+	s[i], s[j] = s[j], s[i]
+}
+
+func (p *Rows) String() string {
+	r := p.s
+
+	var n int
+	for _, s := range r {
+		n += len(s.Line)
+	}
+	n += len(r) * len("\n")
+
+	var sb strings.Builder
+	sb.Grow(n)
+
+	for _, c := range r {
+		for _, rn := range c.Line {
+			sb.WriteByte(rn)
+		}
+
+		sb.WriteString("\n")
+	}
+
+	return sb.String()
+}
+
+func load(sources []string) []byte {
+	if len(sources) == 0 {
+		return loadStdin()
+	}
+
+	inputs := make([][]byte, 0, len(sources))
+	for _, path := range sources {
+		if path == "-" {
+			inputs = append(inputs, loadStdin())
+
+			continue
+		}
+
+		inputs = append(inputs, loadFile(path))
+	}
+
+	var totalSize int
+	for _, s := range inputs {
+		totalSize += len(s)
+	}
+
+	var b bytes.Buffer
+	b.Grow(totalSize)
+
+	for _, c := range inputs {
+		b.Write(c)
+	}
+
+	return b.Bytes()
+}
+
+func loadStdin() []byte {
+	b, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		log.Fatalf("can't read stdin: %e", err)
+	}
+
+	return b
+}
+
+func loadFile(path string) []byte {
+	if _, err := os.Stat(path); err != nil {
+		log.Fatalf("file not exists: %s", path)
+	}
+
+	content, err := os.ReadFile(path)
+	if err != nil {
+		log.Fatalf("file open file: %s", err)
+	}
+
+	return content
+}
+
+func splitLines(b, sp []byte, key int) []*Row {
+	r := make([]*Row, 0, bytes.Count(b, sp))
+	for _, b := range bytes.Split(b, sp) {
+		var column []byte
+
+		if key != 0 {
+			bs := bytes.Split(b, []byte(" "))
+
+			if len(bs) < key {
+				continue // TODO is it error or not?
+				// log.Fatalf("Column for key \"%d\" doesn't exists", cfg.Key)
+			}
+
+			column = bs[key-1]
+		}
+
+		r = append(r, &Row{Line: b, Column: column})
+	}
+
+	return r
+}
+
+func uniques(r []*Row) []*Row {
+	m := make(map[string]*Row, len(r))
+
+	for _, r := range r {
+		r := r
+
+		m[string(r.Line)] = r
+	}
+
+	return maps.Values(m)
+}

sort-cli/main_test.go

@@ -2,11 +2,10 @@ package main
 
 import (
 	"flag"
+	"github.com/stretchr/testify/assert"
 	"os"
 	"strings"
 	"testing"
-
-	"github.com/stretchr/testify/assert"
 )
 
 func TestFlags(t *testing.T) {
@@ -21,26 +20,22 @@ 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",

sqlc.yaml

@@ -1,14 +0,0 @@
-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

@@ -1,10 +0,0 @@
-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

@@ -1,32 +0,0 @@
-// 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

@@ -1,9 +0,0 @@
--- 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

@@ -1,37 +0,0 @@
-// 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

@@ -1,9 +0,0 @@
--- 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

@@ -1,45 +0,0 @@
-// 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

@@ -1,16 +0,0 @@
-// 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

@@ -1,16 +0,0 @@
-// 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

@@ -1,78 +0,0 @@
-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

@@ -1,54 +0,0 @@
-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

@@ -1,44 +0,0 @@
-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/uniquechars.go

@@ -1,22 +0,0 @@
-package uniqueschars
-
-import (
-	"unicode"
-	"unicode/utf8"
-)
-
-func Unique(s string) bool {
-	m := make(map[rune]struct{}, utf8.RuneCountInString(s)/2)
-
-	for _, c := range s {
-		c := unicode.ToLower(c)
-
-		if _, ok := m[c]; ok {
-			return false
-		}
-
-		m[c] = struct{}{}
-	}
-
-	return true
-}

unique-chars/uniquechars_test.go

@@ -1,44 +0,0 @@
-package uniqueschars
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestUnique(t *testing.T) {
-	cases := []struct {
-		Name     string
-		input    string
-		expected bool
-	}{
-		{
-			"eng alphabet",
-			"abcdefghijklmnopqrstuvwxyz",
-			true,
-		},
-		{
-			"eng mixed case",
-			"aAbBfF",
-			false,
-		},
-		{
-			"cyrillic alphabet",
-			"абвгдеёжзийклмнопрстуфхцчшщъыьэюя",
-			true,
-		},
-		{
-			"cyrillic case mixed",
-			"аАбБвВ",
-			false,
-		},
-	}
-
-	for _, tc := range cases {
-		tc := tc
-
-		t.Run(tc.Name, func(t *testing.T) {
-			assert.Equal(t, tc.expected, Unique(tc.input))
-		})
-	}
-}

worker-pool/workerpool.go

@@ -1,21 +0,0 @@
-package workerpool
-
-import (
-	"fmt"
-)
-
-func WorkerPool[T any](limit int, worker func(int, T)) chan<- T {
-	tasks := make(chan T, limit)
-
-	for i := 1; i <= limit; i++ {
-		go func(i int) {
-			defer fmt.Printf("worker:%d done\n", i)
-
-			for t := range tasks {
-				worker(i, t)
-			}
-		}(i)
-	}
-
-	return tasks
-}

worker-pool/workerpool_test.go

@@ -1,41 +0,0 @@
-package workerpool
-
-import (
-	"fmt"
-	"sync"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestWorkerPool(t *testing.T) {
-	const tasks = 5
-
-	var wg sync.WaitGroup
-	wg.Add(tasks)
-
-	var mt sync.Mutex
-	done := make(map[int]bool, tasks)
-
-	worker := func(pid int, task int) {
-		defer wg.Done()
-
-		mt.Lock()
-		done[pid] = true
-		mt.Unlock()
-
-		fmt.Printf("task:%+v\n", task)
-	}
-
-	pool := WorkerPool(tasks, worker)
-
-	for j := 0; j < tasks; j++ {
-		pool <- j
-	}
-	close(pool)
-	wg.Wait()
-
-	for _, v := range done {
-		assert.True(t, v)
-	}
-}