flutter_prerender 1.1.0 changelog

1.1.0 #

Two ways this produced wrong output on a completely standard app, both found by running it against a fresh go_router project rather than by reading the code.

The generated page kept nothing from your build #

Prerendering replaces the document a visitor receives, and the generator wrote a fresh <head> from scratch. Everything flutter build web had put there was dropped: the PWA manifest, the favicon, the theme colour, and most consequentially <base href>.

Without that base href, flutter_bootstrap.js resolves main.dart.js against the deep route it was served from, so /beans/kenya asked for /beans/kenya/main.dart.js, got a 404, and the Flutter app never booted. The visitor was left on the static snapshot forever. Nothing in the output looked wrong, which is why it survived a release.

The build's own head is now carried into every generated page. Tags the tool computes per route (title, description, canonical, Open Graph, Twitter, JSON-LD) still win; charset and viewport are not duplicated; inline scripts are dropped, because a build's service-worker bootstrap re-registers against the wrong scope from a deep route. An explicit baseHref in your config still overrides everything.

Every route could come out as a copy of the home page, and the run passed #

Flutter web defaults to the hash URL strategy, where the route lives after a # that no server and no crawler ever sees. Prerendering an app in that state gives you N byte-identical files. The tool warned per route, said "the app may not be routing on the path", and exited 0 — so CI went green and you deployed four pages that each claim to be different.

The warning now names the cause and the fix: call usePathUrlStrategy().
When every non-root route collapses onto the root, that is not a warning any more. It exits 4 and writes nothing you would have had to un-deploy. One duplicate among several is still just a warning, because two paths really can render the same page.

Also #

The README now says to install with dart pub global activate, and measures what flutter pub add costs instead: 24 packages resolved into your app's runtime dependencies for a build-time tool.
It also says the first run downloads about 150 MB of Chromium and takes minutes, and suggests caching it in CI.
New: SourceHead, exported, if you drive the engine yourself.

1.0.0 #

First stable release. From here the public API follows semantic versioning: a breaking change will not land without a major-version bump.

Seal the 20 leaf classes that make up the public surface (PrerenderConfig, PrerenderResult, RouteSpec, the exception types, and the rest) with final. They are meant to be constructed and read, not extended, and nothing in the package or its tests subtypes them. This keeps the rest of 1.x additive: PrerenderResult gained failedRoutes in 0.3.1 and PrerenderConfig grows fields most minors, and each such addition would break an external implements. PageCapturer stays an open interface, because faking it is how the pipeline is tested, ContentNode stays sealed with its four final variants, and PrerenderException stays open as an extensible base.
Correct the documented meaning of parityThreshold. Its field and help text called it a minimum acceptable content similarity, but the guard flags on the injection ratio: a page is suspicious when more than 1 - threshold of its words were never shown, and similarity never drives the decision. A prerender that faithfully covers part of a page has low similarity and is not flagged. The docs now say what the code does, before 1.0.0 freezes the wrong contract.
Fix --version, which printed 0.1.0 in every release since 0.1.0 because a hand-maintained constant was never bumped. It is correct now, and a test reads pubspec.yaml and fails if the two ever drift again.

0.3.2 #

Fix a route being able to write its index.html outside the output directory. A route is turned into a path under --out, but normalizeRoute only ensured a single leading slash: a .. segment (../secret) wrote above the output directory, and a leading // (//etc/passwd) became an absolute path that path.join honoured, discarding --out entirely. This was reachable from a plain routes file or a YAML config, not only --crawl, and had been present since 0.1.0. normalizeRoute now rejects both shapes; discovered crawl links that would traverse are skipped rather than aborting the crawl; and the writer refuses any target outside the output directory as a second layer. Ordinary routes, and a safe absolute link like /../about that cannot climb above root, are unaffected.

0.3.1 #

Fix --crawl aborting the whole run and discarding every page already rendered when it followed a same-origin link to something that is not a Flutter route, such as a PDF or an image linked from the site's own nav or footer. The browser capturer already treats an empty semantics tree and empty rendered text as "this page never booted a Flutter app" and throws; the engine now catches that per route instead of letting it escape run() and take down the whole prerender. Every route rendered before the failure keeps its file and its sitemap entry.
The failed route is recorded in the new PrerenderResult.failedRoutes, printed in the CLI summary, and reported as a warning on stderr. --fail-on-empty also exits non-zero when a route failed to capture.

0.3.0 #

Add --crawl, which discovers routes by following the in-page links the engine already recovers instead of prerendering only the listed routes. The routes you pass (or / when you pass none) seed a work queue, every same-origin link found on a page is normalised and enqueued if it has not been seen, and the crawl stops at --max-pages (default 100). Off-site links, mailto:/tel:, and bare fragments are skipped; an absolute URL is followed only when its origin matches --base-url. Without --crawl nothing changes: the tool still prerenders exactly the routes you list.
The sitemap now lists the pages that were actually prerendered rather than the configured route list, so a crawl's discovered pages are included. For a fixed route list the output is the same as before.

0.2.2 #

Shorten the screenshot description. pub.dev accepts up to 200 characters but scores only those under 160, so the previous release published cleanly and quietly gave up the documentation points it was meant to earn.

0.2.1 #

Declare the diagram in pubspec.yaml so pub.dev renders it on the package page. It was already in the repository and the README, but pub.dev shows only what the screenshots: field points at.

0.2.0 #

Add --robots, which writes a robots.txt declaring the generated sitemap. The tool produced a sitemap.xml that nothing pointed at; the Sitemap: directive is the documented way to announce one and is what webmaster tools and non-Google crawlers read. The line is only written when a sitemap was actually produced, so a crawler is never sent to a URL that would 404.
The flag is off by default and never replaces an existing robots.txt. A project that ships web/robots.txt has it copied into the build, and silently overwriting crawl rules somebody wrote on purpose would be a worse bug than not writing the file; the existing one is left alone and the run reports it as a warning.
Fix dart analyze reporting dozens of errors on a clean checkout. The example is a Flutter app, so the package's pure-Dart analyzer could not resolve any widget in it and called every one undefined. It is excluded from the package's analysis and still checked on its own terms with cd example && flutter analyze.

0.1.2 #

Docs: make clear up front that this is a command-line tool you run against a flutter build web output, not a package you add to an app's dependencies. Also clarifies why pub.dev lists the platforms the tool runs on (Linux, macOS, Windows) rather than web.

0.1.1 #

Docs: tightened the README wording and visuals.

0.1.0 #

Initial release.

CLI (flutter_prerender) that prerenders a flutter build web output to static, crawlable HTML, one file per route.
Recovers headings, paragraphs, links and image alt text from Flutter's accessibility tree without changing app source.
Injects <title>, meta description, canonical, Open Graph, Twitter Card and optional JSON-LD per route.
Generates sitemap.xml.
Parity guard that compares the generated HTML against Flutter's own accessibility text and warns (or fails, with --fail-on-parity) on injected content.
Warnings for routes that recover no content (--fail-on-empty to make it fatal) and for routes that duplicate another route's content.
YAML config file and command-line flags, with flags overriding the file. Invalid numeric flags are rejected instead of silently ignored.

flutter_prerender 1.1.0
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1.1.0 #

The generated page kept nothing from your build #

Every route could come out as a copy of the home page, and the run passed #

Also #

1.0.0 #

0.3.2 #

0.3.1 #

0.3.0 #

0.2.2 #

0.2.1 #

0.2.0 #

0.1.2 #

0.1.1 #

0.1.0 #

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Metadata

1.1.0 #

The generated page kept nothing from your build #

Every route could come out as a copy of the home page, and the run passed #

Also #

1.0.0 #

0.3.2 #

0.3.1 #

0.3.0 #

0.2.2 #

0.2.1 #

0.2.0 #

0.1.2 #

0.1.1 #

0.1.0 #

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flutter_prerender 1.1.0
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