Technical/Increase project code quality

* Added, configured cspell
* Added, configured markdownlint
* Added, configured shellcheck
* Added, configured yamllint
* Updated, refactored circleci config
* Fixed linters issues through all codebase

.circleci/config.yml

@@ -1,22 +1,43 @@
+---
+
 version: 2.1
 
+defaults: &defaults
+  working_directory: ~/truemail-go
+  docker:
+    - image: cimg/go:1.19
+
 jobs:
   linters:
     docker:
       - image: golangci/golangci-lint:v1.50.1-alpine
+
     steps:
       - checkout
-      - run: golangci-lint run
 
-  test:
-    docker:
-      - image: cimg/go:1.19.3
-    working_directory: ~/truemail-go
+      - run:
+          name: Installing linters
+          command: |
+                apk add --update npm shellcheck yamllint
+                npm install --global --save-dev git+https://github.com/streetsidesoftware/cspell-cli markdownlint-cli lefthook
+                cp .circleci/linter_configs/.lefthook.yml lefthook.yml
+
+      - run:
+          name: Running linters
+          command: lefthook run linters
+
+  tests:
+    <<: *defaults
+
     steps:
       - checkout
 
       - run:
-          name: Running tests with Gotestsum
+          name: Installing Gotestsum
+          command: go get gotest.tools/gotestsum
+
+      - run:
+          name: Running tests
           command: gotestsum --format standard-verbose -- -coverprofile=coverage_report ./...
 
       - run:
@@ -41,8 +62,25 @@ jobs:
           command: |
             bash <(curl -s https://codecov.io/bash) -f coverage_report
 
+  release:
+    <<: *defaults
+
+    steps:
+      - checkout
+
+      - run:
+          name: Publishing new release to Go Packages
+          command: |
+            ./.circleci/scripts/release.sh
+
 workflows:
   build:
     jobs:
       - linters
-      - test
+      - tests
+      - release:
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              only: /v[0-9]+(\.[0-9]+)*(-.*)*/

.circleci/linter_configs/.cspell.yml

@@ -0,0 +1,33 @@
+---
+
+enableGlobDot: true
+
+patterns:
+  - name: GithubUser
+    pattern: /\[@.+\]/gmx
+  - name: MarkdownCode
+    pattern: /`{1,3}.+`{1,3}/gmx
+  - name: MarkdownCodeBlock
+    pattern: /^\s*```[\s\S]*?^\s*```/gmx
+
+languageSettings:
+  - languageId: markdown
+    ignoreRegExpList:
+      - Email
+      - GithubUser
+      - MarkdownCode
+      - MarkdownCodeBlock
+
+words:
+  - Codecov
+  - Unmarshal
+  - Trotsenko
+  - Vladislav
+  - bestwebua
+  - codebases
+  - consts
+  - dockerized
+  - struct
+  - substeps
+  - truemail
+  - unexported

.golangci.yml → .circleci/linter_configs/.golangci.yml

@@ -1,3 +1,5 @@
+---
+
 linters:
   enable:
     - gocyclo

.circleci/linter_configs/.lefthook.yml

@@ -0,0 +1,19 @@
+---
+
+no_tty: true
+skip_output:
+  - meta
+
+linters:
+  commands:
+    cspell:
+      run: cspell-cli lint -c '.circleci/linter_configs/.cspell.yml' '**/*.{txt,md}'
+    golangci:
+      run: golangci-lint -c '.circleci/linter_configs/.golangci.yml' run
+    markdownlint:
+      run: markdownlint -c '.circleci/linter_configs/.markdownlint.yml' '**/*.md'
+    shellcheck:
+      glob: '*.{sh}'
+      run: shellcheck --norc {all_files}
+    yamllint:
+      run: yamllint -c '.circleci/linter_configs/.yamllint.yml' .

.circleci/linter_configs/.markdownlint.yml

@@ -0,0 +1,9 @@
+---
+
+default: true
+
+MD013:
+  line_length: 500
+
+MD024:
+  siblings_only: true

.circleci/linter_configs/.yamllint.yml

@@ -0,0 +1,7 @@
+---
+
+extends: default
+
+rules:
+  line-length:
+    max: 200

.circleci/scripts/release.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+set -e
+
+latest_tag() {
+  git tag -l | grep -E "^v[0-9]+\.[0-9]+\.[0-9]+" | cut -d"-" -f 1 | sort | tail -n 1
+}
+
+publish_release() {
+  echo "Triggering pkg.go.dev about new truemail-go release..."
+  curl -X POST "https://pkg.go.dev/fetch/github.com/truemail-rb/truemail-go@$(latest_tag)"
+}
+
+publish_release

.github/BRANCH_NAMING_CONVENTION.md

@@ -16,7 +16,7 @@ bugfix/fix-some-bug-name
 
 ### Squash commits
 
-Please squash all branch commits into the one before openning your PR from your fork. It's simple to do with the git:
+Please squash all branch commits into the one before opening your PR from your fork. It's simple to do with the git:
 
 ```bash
 git rebase -i [hash your first commit of your branch]~1
@@ -25,9 +25,9 @@ git rebase -i 6467fe36232401fa740af067cfd8ac9ec932fed2~1 # example
 
 ### Add commit description
 
-Please complete your commit description folowing next pattern:
+Please complete your commit description following next pattern:
 
-```
+```code
 Technical/Add info files # should be the same name as your branch name
 
 * Added license, changelog, contributing, code of conduct docs

.github/FUNDING.yml

@@ -1 +1,3 @@
+---
+
 github: [bestwebua]

CHANGELOG.md

@@ -2,6 +2,25 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.3] - 2022-12-26
+
+### Added
+
+- Added [`cspell`](https://cspell.org) linter
+- Added [`markdownlint`](https://github.com/DavidAnson/markdownlint) linter
+- Added [`shellcheck`](https://www.shellcheck.net) linter
+- Added [`yamllint`](https://yamllint.readthedocs.io) linter
+- Added [`lefthook`](https://github.com/evilmartians/lefthook) linters aggregator
+
+### Fixed
+
+- Fixed typos in project's codebase
+- Fixed new project's linter issues
+
+### Updated
+
+- Updated `CircleCI` config
+
 ## [1.0.2] - 2022-11-20
 
 - Updated dependencies
@@ -32,7 +51,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Updated
 
 - Updated `ConfigurationAttr#validate`, tests
-- Updated golangci config
+- Updated `golangci` config
 - Updated package documentation
 
 ## [0.1.2] - 2022-02-28

README.md

@@ -202,7 +202,7 @@ configuration := truemail.NewConfiguration(
     // This parameter uses for SMTP session in SMTP validation layer.
     SmtpPort: 2525,
 
-    // Optional parameter. This option will provide to use smtp fail fast behaviour. When
+    // Optional parameter. This option will provide to use smtp fail fast behavior. When
     // smtpFailFast = true it means that Truemail ends smtp validation session after first
     // attempt on the first mx server in any fail cases (network connection/timeout error,
     // smtp validation error). This feature helps to reduce total time of SMTP validation
@@ -487,7 +487,7 @@ By default, you don't need pass with-parameter to use it. Example of usage is sp
 
 ##### SMTP fail fast enabled
 
-Truemail can use fail fast behaviour for SMTP validation layer. When `SmtpFailFast = true` it means that `truemail` ends smtp validation session after first attempt on the first mx server in any fail cases (network connection/timeout error, smtp validation error). This feature helps to reduce total time of SMTP validation session up to 1 second.
+Truemail can use fail fast behavior for SMTP validation layer. When `SmtpFailFast = true` it means that `truemail` ends smtp validation session after first attempt on the first mx server in any fail cases (network connection/timeout error, smtp validation error). This feature helps to reduce total time of SMTP validation session up to 1 second.
 
 ```go
 import "github.com/truemail-rb/truemail-go"

dns_resolver_test.go

@@ -123,7 +123,7 @@ func TestDnsResolverCnameRecord(t *testing.T) {
 
 	t.Run("when target CNAME record found", func(t *testing.T) {
 		otherDomain := randomDomain()
-		dnsRecords := map[string]mockdns.Zone{domain: {CNAME: toDnsHostName(otherDomain)}} // TODO: different go-mockdns behaviour for domain key, should be with dot
+		dnsRecords := map[string]mockdns.Zone{domain: {CNAME: toDnsHostName(otherDomain)}} // TODO: different go-mockdns behavior for domain key, should be with dot
 		dnsResolver := createDnsResolver(dnsRecords)
 		resolvedHostName, err := dnsResolver.cnameRecord(domain)
 

validator.go

@@ -26,7 +26,7 @@ func (validatorResult *validatorResult) addError(key, value string) {
 	validatorResult.Errors[key] = value
 }
 
-// Structure with behaviour. Responsible for the
+// Structure with behavior. Responsible for the
 // logic of calling the validation layers sequence
 type validator struct {
 	result *validatorResult