v0.9.0

Herb v0.9

Check out the "What's new in Herb v0.9" post on the Herb Blog.

Core

• Fix TS2304: Cannot find name 'TextDecoder' error by @marcoroth in #1175
• Types: Add discriminated union support across language bindings by @marcoroth in #1154
• Implement lex_file and parse_file in language bindings by @marcoroth in #1325
• Expose Herb.parse_puby to parse Ruby with Prism by @marcoroth in #1353

Parser

• Fix ERB control flow tags in attribute positions by @marcoroth in #873
• Add analyze option to parser_options_T by @citizen428 in #1144
• Introduce HTMLConditionalElementNode by @marcoroth in #1146
• Make parser_options parameter const in herb_parse by @citizen428 in #1151
• Introduce HTMLConditionalOpenTagNode by @marcoroth in #1153
• Handle invalid HTML comment closing tag --!> by @marcoroth in #1156
• Improve error recovery for unclosed open tags and unterminated quotes by @marcoroth in #1169
• Add strict option to parser_options by @marcoroth in #1171
• Improve error recovery for ERB tags by @marcoroth in #1170
• Introduce HTMLOmittedCloseTagNode and OmittedClosingTagError by @marcoroth in #1173
• Introduce MissingAttributeValueError for empty attribute values by @marcoroth in #1182
• Mention strict: false in OmittedClosingTagError message by @marcoroth in #1189
• Don't treat backslash as escape character in attribute values by @marcoroth in #1213
• Fix regressions in analyzing conditional open tags by @marcoroth in #1208
• Store parser options on ParseResult by @marcoroth in #1190
• Introduce UnclosedCloseTagError by @marcoroth in #1216
• Improve ERB case node and end tag matching by @marcoroth in #1237
• Fix ConditionalElementMultipleTagsError on valid templates by @marcoroth in #1240
• Fix lambda block detection by @marcoroth in #1250
• Introduce StrayERBClosingTagError by @marcoroth in #1256
• Friendly token names in Unexpected Token error messages by @marcoroth in #194
• Allow inline case/when and case/in in strict mode by @marcoroth in #1263
• Rename source to element_source for HTMLElementNode by @marcoroth in #1331
• Analyze and transform Action View helpers by @marcoroth in #1347
• Expose Prism Nodes in Herb Syntax Tree by @marcoroth in #1350
• Detect turbo_frame_tag helper by @marcoroth in #1354

Engine

• Turn on strict by default by @marcoroth in #1184
• Fix ERB expression compilation when code contains a heredoc by @pinzonjulian in #1206
• Ensure Engine produces valid Ruby in test suite by @marcoroth in #1207
• Ensure assert_evaluated_snapshot produces valid Ruby in tests by @marcoroth in #1209
• Fix newline handling after heredoc terminators by @marcoroth in #1246
• Add support for disabling debug spans in ERBBlockNode via comments by @kozy4324 in #977
• <%= -%> does not trim trailing newline by @joelhawksley in #1361
• Inline comments on <% end %> on output blocks produce invalid Ruby by @joelhawksley in #1363
• Whitespace stripped between HTML closing tag and ERB control tag by @joelhawksley in #1366

Formatter

• Make sure herb-format respects .herb.yml by @marcoroth in #1185
• Don't collapse multiple ERB expressions in block elements by @marcoroth in #1214
• Add expectFormattedToMatch test helper by @marcoroth in #1215
• Fix infinite loop when rendering multiple groups of adjacent inline elements by @ydah in #1008
• Fix ERB text flow formatting to keep adjacent inline elements together by @ydah in #1010
• Fix punctuation separating from ERB tags in mixed content by @marcoroth in #1266
• Extract Text Flow Engine by @marcoroth in #1267
• Extract Attribute Renderer by @marcoroth in #1269
• Extract Spacing Analyzer and Comment Helpers by @marcoroth in #1270
• Fix adjacent ERB tags in ERB block by @marcoroth in #1278
• Preserve user newlines in block elements with mixed content by @marcoroth in #1279
• Preserve content in white-space significant elements by @marcoroth in #1280
• Refactor Format Printer using withInlineMode by @marcoroth in #1285
• Preserve user newlines for block elements with ERB children by @marcoroth in #1295
• Preserve user newlines for inline elements by @marcoroth in #1305

Linter

• Fix html-no-empty-headings to detect non-output ERB by @marcoroth in #1162
• Update html-anchor-require-href with erblint-github insights by @marcoroth in #1228
• Link Linter rule IDs to docs in CLI output by @marcoroth in #1241
• Improve colors in Linter CLI output by @marcoroth in #1242
• Link file paths in Linter CLI output by @marcoroth in #1243
• Make RuleClass().name static by @citizen428 in #1268
• Fix false positive for dynamic IDs across separate ERB blocks by @marcoroth in #1299
• Access rule type from class instead of instance by @marcoroth in #1298
• Accessibility rules should be warnings, not errors by @joelhawksley in #1066
• Improve html-img-require-alt rule by @marcoroth in #1311
• Move path to CLI-only bundle by @marcoroth in #1352
• Make html-anchor-require-href Action View Helper aware by @marcoroth in #1367
• CLI: Implement a Linter Worker to parallelize file processing by @marcoroth in #1371

Linter Rules

New Rules

• Implement erb-no-conditional-html-element rule by @marcoroth in #1150
• Implement html-no-aria-hidden-on-body rule by @marcoroth in #1163
• Implement html-no-abstract-roles rule by @marcoroth in #1164
• Implement erb-no-trailing-whitespace rule by @markokajzer in #1168
• Implement erb-no-conditional-open-tag rule by @markokajzer in #1200
• Implement html-allowed-script-type rule by @markokajzer in #1201
• Implement html-require-closing-tags rule by @markokajzer in #1199
• Implement turbo-permanent-require-id rule by @pardeyke in #1229
• Implement erb-no-inline-case-conditions rule by @marcoroth in #1265
• Implement erb-no-interpolated-class-names rule by @marcoroth in #1283
• Implement erb-no-duplicate-branch-elements rule by @marcoroth in #1301
• Implement erb-no-then-in-control-flow rule by @marcoroth in #1309
• Implement erb-no-statement-in-script rule by @marcoroth in #1330
• Implement erb-no-javascript-tag-helper rule by @marcoroth in #1330
• Implement erb-no-unsafe-script-interpolation rule by @marcoroth in #1330
• Implement erb-no-raw-output-in-attribute-value rule by @marcoroth in #1330
• Implement erb-no-unsafe-raw rule by @marcoroth in #1330
• Implement erb-no-unsafe-js-attribute rule by @marcoroth in #1330
• Implement erb-no-output-in-attribute-position rule by @marcoroth in #1330
• Implement erb-no-output-in-attribute-name rule by @marcoroth in #1330
• Implement erb-no-instance-variables-in-partials linter rule by @marcoroth in #1355
• Implement actionview-no-silent-helper rule by @marcoroth in #1358
• Implement html-details-has-summary rule by @marcoroth in #1370

Autofixes

• Implement autofix for erb-no-duplicate-branch-elements by @marcoroth in #1302

Language Server

• Respect .herb.yml files.exclude in LintService by @marcoroth in #1271
• Implement Document Highlights by @marcoroth in #1284
• Implement Folding Ranges by @marcoroth in #801
• Implement Toggle Comment Service by @marcoroth in #1308
• Improve edge cases in Comment Service by @marcoroth in #1329
• Implement Hover Provider for Action View Helpers by @marcoroth in #1356
• Action View Helper rewrite Code Actions by @marcoroth in #1357

Playground

• Add analyze and strict parser options by @marcoroth in #1172
• Implement a Ruby Prism playground by @marcoroth in #1360

Rewriter

• Preserve interpolated ERB class names in tailwind rewriter by @marcoroth in #1085
• Implement Action View Tag Helpers <-> HTML rewriters by @marcoroth in #1348
• Fix single-arg link_to in Action View rewriter by @marcoroth in #1351

Printer

• Implement Indentation Printer by @marcoroth in #1300

Extractor

• Add extract_ruby_options across all language bindings by @Lusqinha in #675
• Fix multi-line ERB comment extraction in extract_ruby by @marcoroth in #1297

Ruby

• Ruby: Respect .herb.yml and make exclude additive by @marcoroth in #1166
• Ruby: Remove tsort from Gemfile since it's fixed in RBS by @marcoroth in #1187
• Ruby: Don't run tests with forking threads by default by @marcoroth in #1255
• Ruby: Add more granular test rake tasks by @marcoroth in #1257
• Ruby: Re-enable Sorbet check by @mickeytgl in #465
• Ruby: Fix native extension loading for new RubyGems (Ruby 4.1+) by @marcoroth in #1281
• Ruby: Add arena_stats kwarg and --arena-stats CLI flag by @marcoroth in #1293
• Ruby: Improve --arena-stats output in analyze by @marcoroth in #1324
• Ruby: Add ability to install gem from a branch by @joelhawksley in #1337

Ruby CLI

• Improve and flesh out herb analyze command by @marcoroth in #1259
• Support stdin as an option for [file] by @marcoroth in #1186
• Expose Node.js binaries in Herb Ruby CLI by @marcoroth in #1192
• Expose --no-analyze and --track-whitespace options by @marcoroth in #1249
• Add --arena-stats flag to analyze subcommand by @marcoroth in #1294
• Show compiled source when compile produces invalid Ruby by @marcoroth in #1365

Rust

• Rust: Implement Visitors in Rust Bindings by @marcoroth in #1260
• Rust: Implement Herb Configuration in Rust by @marcoroth in #1261

Node.js/Deno

• Fix CommonJS packaging in @herb-tools/node by @fc-anjos in #375
• Test Deno compatibility in CI by @marcoroth in #1296

Java

• Java: Add JUnit and proper Java tests by @citizen428 in #1152
• Java: Migrate snapshot tests to JUnit by @marcoroth in #1217

Config

• Add engine.* configuration options by @joelhawksley in #1315 and @marcoroth in #1375

Visual Studio Code Extension

• Register Toggle Comment Service in VS Code Extension by @marcoroth in #1308

Documentation

• Branding updates by @marcoroth in #1286

Internal

• Upgrade to TypeScript 6.0 Beta by @marcoroth in #1148
• Upgrade to TypeScript 6.0 RC by @marcoroth in #1349
• CI: Reorder build steps to fail fast on cheap checks by @citizen428 in #1145
• Apply fixes from oxlint by @marcoroth in #1238
• Lock pkg-pr-new to v0.0.63 for now by @marcoroth in #1258

WebAssembly

• Remove ERROR_ON_UNDEFINED_SYMBOLS flag by @marcoroth in #1165
• Upgrade to Emscripten 5.x by @marcoroth in #1247

libherb

• Remove unused imports and fix signatures by @citizen428 in #1191
• Cleanup parser and bindings by @marcoroth in #1212
• Refactor analyze.c into src/analyze/ by @marcoroth in #714
• Add HERB_EXCLUDE_PRETTYPRINT preprocessor flag by @marcoroth in #1262
• Extract hb_allocator_T by @marcoroth in #1287
• Use Arena Allocator for Lexing and Parsing by @marcoroth in #726
• Implement merging arena pages by @timkaechele in #719
• Implement Tracking Allocator and add --leak-check to analyze by @marcoroth in #1304
• Use hb_allocator_T for location_create by @marcoroth in #1306
• Remove unnecessary malloc usage in errors and hb_string by @marcoroth in #1307
• Use hb_string_T for token_T.value by @timkaechele in #687
• Use hb_string_T for ERROR_T.message and error functions by @marcoroth in #1313
• Add trim, blank and simplify hb_string_T operations by @marcoroth in #1314
• Migrate token_type_to_friendly_string to hb_string_T by @marcoroth in #1316
• Update Prism and Ruby helpers to use hb_string_T by @marcoroth in #1317
• Optimize hb_string() to compute length at compile time by @marcoroth in #1318
• Inline hot-path lexer peek helpers by @marcoroth in #1319
• Inline hot-path hb_string functions by @marcoroth in #1320
• Implement realloc for hb_allocator_T by @marcoroth in #1322
• Migrate hb_array to use hb_allocator_T infrastructure by @marcoroth in #1323
• Migrate hb_buffer to use hb_allocator_T infrastructure by @marcoroth in #1326
• Add HB_STRING_LIST for static hb_string_T array initialization by @marcoroth in #1321
• Migrate hb_narray to use new allocator system by @timkaechele in #1327

Dependencies

• Bump qs from 6.14.1 to 6.14.2 by @dependabot[bot] in #1149
• Bump markdown-it from 14.1.0 to 14.1.1 by @dependabot[bot] in #1159
• Bump rimraf from 6.1.2 to 6.1.3 by @dependabot[bot] in #1194
• Bump playwright from 1.58.1 to 1.58.2 by @dependabot[bot] in #1195
• Bump oxlint from 1.43.0 to 1.48.0 by @dependabot[bot] in #1197
• Bump esbuild from 0.27.2 to 0.27.3 by @dependabot[bot] in #1198
• Bump ajv from 6.12.6 to 6.14.0 by @dependabot[bot] in #1227
• Bump oxlint from 1.48.0 to 1.50.0 by @dependabot[bot] in #1235
• Bump @typescript-eslint/parser from 8.54.0 to 8.56.1 by @dependabot[bot] in #1234
• Bump rollup from 4.57.1 to 4.59.0 by @dependabot[bot] in #1248
• Bump @shikijs/vitepress-twoslash from 3.22.0 to 4.0.1 by @dependabot[bot] in #1273
• Bump oxlint from 1.50.0 to 1.51.0 by @dependabot[bot] in #1275
• Bump yeoman-generator from 7.5.1 to 8.0.0 by @dependabot[bot] in #1276
• Bump @types/node from 22.19.13 to 25.3.3 in /javascript/packages/language-server by @dependabot[bot] in #1272
• Bump @typescript-eslint/eslint-plugin from 8.55.0 to 8.56.1 by @dependabot[bot] in #1274
• Bump underscore from 1.13.7 to 1.13.8 by @dependabot[bot] in #1290
• Bump svgo from 2.8.0 to 2.8.2 by @dependabot[bot] in #1303
• Bump postcss from 8.5.6 to 8.5.8 by @dependabot[bot] in #1333
• Bump node-addon-api from 8.5.0 to 8.6.0 by @dependabot[bot] in #1335
• Bump yeoman-generator from 8.0.0 to 8.0.2 by @dependabot[bot] in #1334
• Bump @shikijs/vitepress-twoslash from 4.0.1 to 4.0.2 by @dependabot[bot] in #1336

New Contributors

• @Lusqinha made their first contribution in #675
• @markokajzer made their first contribution in #1168
• @pinzonjulian made their first contribution in #1206
• @pardeyke made their first contribution in #1229
• @fc-anjos made their first contribution in #375
• @joelhawksley made their first contribution in #1066

Commits

Full Changelog: v0.8.10...v0.9.0