Add Dockerfile highlighting support

src/Highlighter.php

@@ -11,6 +11,7 @@
 use Tempest\Highlight\Languages\Css\CssLanguage;
 use Tempest\Highlight\Languages\Diff\DiffLanguage;
 use Tempest\Highlight\Languages\DocComment\DocCommentLanguage;
+use Tempest\Highlight\Languages\Dockerfile\DockerfileLanguage;
 use Tempest\Highlight\Languages\Ellison\EllisonLanguage;
 use Tempest\Highlight\Languages\Gdscript\GdscriptLanguage;
 use Tempest\Highlight\Languages\Html\HtmlLanguage;
@@ -43,6 +44,7 @@ public function __construct(
             ->addLanguage(new CssLanguage())
             ->addLanguage(new DiffLanguage())
             ->addLanguage(new DocCommentLanguage())
+            ->addLanguage(new DockerfileLanguage())
             ->addLanguage(new EllisonLanguage())
             ->addLanguage(new GdscriptLanguage())
             ->addLanguage(new HtmlLanguage())

src/Languages/Dockerfile/DockerfileLanguage.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Languages\Dockerfile;
+
+use Tempest\Highlight\Languages\Base\BaseLanguage;
+use Tempest\Highlight\Languages\Dockerfile\Patterns\ImageAliasKeywordPattern;
+use Tempest\Highlight\Languages\Dockerfile\Patterns\ImageAliasNamePattern;
+use Tempest\Highlight\Languages\Dockerfile\Patterns\ImageNamePattern;
+use Tempest\Highlight\Languages\Dockerfile\Patterns\ImageTagPattern;
+use Tempest\Highlight\Languages\Dockerfile\Patterns\KeywordPattern;
+
+class DockerfileLanguage extends BaseLanguage
+{
+    public function getName(): string
+    {
+        return 'Dockerfile';
+    }
+
+    public function getPatterns(): array
+    {
+        return [
+            new KeywordPattern('ADD'),
+            new KeywordPattern('ARG'),
+            new KeywordPattern('CMD'),
+            new KeywordPattern('COPY'),
+            new KeywordPattern('ENTRYPOINT'),
+            new KeywordPattern('ENV'),
+            new KeywordPattern('EXPOSE'),
+            new KeywordPattern('FROM'),
+            new KeywordPattern('HEALTHCHECK'),
+            new KeywordPattern('LABEL'),
+            new KeywordPattern('MAINTAINER'),
+            new KeywordPattern('ONBUILD'),
+            new KeywordPattern('RUN'),
+            new KeywordPattern('SHELL'),
+            new KeywordPattern('STOPSIGNAL'),
+            new KeywordPattern('USER'),
+            new KeywordPattern('VOLUME'),
+            new KeywordPattern('WORKDIR'),
+
+            new ImageNamePattern(),
+            new ImageAliasKeywordPattern(),
+            new ImageAliasNamePattern(),
+            new ImageTagPattern(),
+        ];
+    }
+}

src/Languages/Dockerfile/Patterns/ImageAliasKeywordPattern.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Languages\Dockerfile\Patterns;
+
+use Tempest\Highlight\IsPattern;
+use Tempest\Highlight\Pattern;
+use Tempest\Highlight\PatternTest;
+use Tempest\Highlight\Tokens\TokenTypeEnum;
+
+#[PatternTest(input: 'FROM php', output: null)]
+#[PatternTest(input: 'FROM php:8.1', output: null)]
+#[PatternTest(input: 'FROM php:8.1 AS stage-one', output: 'AS')]
+#[PatternTest(input: ' FROM php:8.1 AS stage-one ', output: 'AS')]
+final readonly class ImageAliasKeywordPattern implements Pattern
+{
+    use IsPattern;
+
+    public function getPattern(): string
+    {
+        return "/^[\s]*FROM[\s][\S]+[\s](?<match>AS)[\s][\S]+/m";
+    }
+
+    public function getTokenType(): TokenTypeEnum
+    {
+        return TokenTypeEnum::KEYWORD;
+    }
+}

src/Languages/Dockerfile/Patterns/ImageAliasNamePattern.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Languages\Dockerfile\Patterns;
+
+use Tempest\Highlight\IsPattern;
+use Tempest\Highlight\Pattern;
+use Tempest\Highlight\PatternTest;
+use Tempest\Highlight\Tokens\TokenTypeEnum;
+
+#[PatternTest(input: 'FROM php', output: null)]
+#[PatternTest(input: 'FROM php:8.1', output: null)]
+#[PatternTest(input: 'FROM php:8.1 AS stage-one', output: 'stage-one')]
+#[PatternTest(input: ' FROM php:8.1 AS stage-one ', output: 'stage-one')]
+final readonly class ImageAliasNamePattern implements Pattern
+{
+    use IsPattern;
+
+    public function getPattern(): string
+    {
+        return "/^[\s]*FROM[\s][\S]+[\s]AS[\s](?<match>[\S]+)/m";
+    }
+
+    public function getTokenType(): TokenTypeEnum
+    {
+        return TokenTypeEnum::VALUE;
+    }
+}

src/Languages/Dockerfile/Patterns/ImageNamePattern.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Languages\Dockerfile\Patterns;
+
+use Tempest\Highlight\IsPattern;
+use Tempest\Highlight\Pattern;
+use Tempest\Highlight\PatternTest;
+use Tempest\Highlight\Tokens\TokenTypeEnum;
+
+#[PatternTest(input: 'FROM php', output: 'php')]
+#[PatternTest(input: ' FROM php', output: 'php')]
+#[PatternTest(input: 'FROM php:8.1', output: 'php')]
+#[PatternTest(input: 'FROM php/cli:8.1', output: 'php/cli')]
+#[PatternTest(input: 'FROM php:8.1 AS stage-one', output: 'php')]
+
+final readonly class ImageNamePattern implements Pattern
+{
+    use IsPattern;
+
+    public function getPattern(): string
+    {
+        return "/^[\s]*FROM[\s](?<match>[\w\/]+)/m";
+    }
+
+    public function getTokenType(): TokenTypeEnum
+    {
+        return TokenTypeEnum::VALUE;
+    }
+}

src/Languages/Dockerfile/Patterns/ImageTagPattern.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Languages\Dockerfile\Patterns;
+
+use Tempest\Highlight\IsPattern;
+use Tempest\Highlight\Pattern;
+use Tempest\Highlight\PatternTest;
+use Tempest\Highlight\Tokens\TokenTypeEnum;
+
+#[PatternTest(input: 'FROM php', output: null)]
+#[PatternTest(input: 'FROM php', output: null)]
+#[PatternTest(input: 'FROM php:8.1', output: '8.1')]
+#[PatternTest(input: 'FROM php/cli:8.1', output: '8.1')]
+#[PatternTest(input: 'FROM php:8.1 AS stage-one', output: '8.1')]
+
+final readonly class ImageTagPattern implements Pattern
+{
+    use IsPattern;
+
+    public function getPattern(): string
+    {
+        return "/^[\s]*FROM[\s][\w\/]+:(?<match>\S+)[\s]?/m";
+    }
+
+    public function getTokenType(): TokenTypeEnum
+    {
+        return TokenTypeEnum::VALUE;
+    }
+}

src/Languages/Dockerfile/Patterns/KeywordPattern.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Languages\Dockerfile\Patterns;
+
+use Tempest\Highlight\IsPattern;
+use Tempest\Highlight\Pattern;
+use Tempest\Highlight\Tokens\TokenTypeEnum;
+
+final readonly class KeywordPattern implements Pattern
+{
+    use IsPattern;
+
+    public function __construct(private string $keyword)
+    {
+    }
+
+    public function getPattern(): string
+    {
+        return "/^[\s]*(?<match>{$this->keyword})[\s].*/m";
+    }
+
+    public function getTokenType(): TokenTypeEnum
+    {
+        return TokenTypeEnum::KEYWORD;
+    }
+}

tests/Languages/Dockerfile/Patterns/KeywordPatternTest.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Tests\Languages\Dockerfile\Patterns;
+
+use PHPUnit\Framework\TestCase;
+use Tempest\Highlight\Languages\Dockerfile\Patterns\KeywordPattern;
+use Tempest\Highlight\Tests\TestsPatterns;
+
+class KeywordPatternTest extends TestCase
+{
+    use TestsPatterns;
+
+    public function test_pattern()
+    {
+        $this->assertMatches(
+            pattern: new KeywordPattern('FROM'),
+            content: 'FROM image:tag',
+            expected: 'FROM',
+        );
+
+        $this->assertMatches(
+            pattern: new KeywordPattern('FROM'),
+            content: 'FROM image:tag AS alias',
+            expected: 'FROM',
+        );
+
+        $this->assertMatches(
+            pattern: new KeywordPattern('FROM'),
+            content: ' FROM image:tag AS alias',
+            expected: 'FROM',
+        );
+
+        $this->assertMatches(
+            pattern: new KeywordPattern('COPY'),
+            content: <<<'DOCKERFILE'
+                     FROM image:tag
+                     COPY . /usr/share/nginx/html
+                     DOCKERFILE,
+            expected: 'COPY',
+        );
+    }
+}