[web] add --static-assets-url argument to build web#171638
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harryterkelsen merged 13 commits intoflutter:masterfrom Aug 7, 2025
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[web] add --static-assets-url argument to build web#171638harryterkelsen merged 13 commits intoflutter:masterfrom
harryterkelsen merged 13 commits intoflutter:masterfrom
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This pull request has been changed to a draft. The currently pending flutter-gold status will not be able to resolve until a new commit is pushed or the change is marked ready for review again. For more guidance, visit Writing a golden file test for Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. |
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Hey @harryterkelsen can you review this one? :) |
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Mostly LGTM with one requested change
| 'static-assets-url', | ||
| help: | ||
| 'Used when serving the static assets from a different domain the application is hosted on. ' | ||
| 'The value has to start with http and end with a slash "/". ' |
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I think having the static assets url start with http is a little too restrictive and also this documentation is somewhat ambiguous (can the --static-assets-url point to an https:// URL? Yes, but a reasonable person could read this documentation and think only http:// is allowed). I think just remove the check for startsWith('http'), keep the check for endsWith('/'), and update the documentation accordingly.
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Hey, @harryterkelsen. Thanks for your review! I just added a commit attending to your request.
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Sorry for letting this drop off my radar! Thanks for your PR, I requested a small change |
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Hello @harryterkelsen, sorry for pinging twice in a row. Do you mind reviewing this again? |
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Aug 6, 2025
packages/flutter_tools/test/commands.shard/hermetic/build_web_test.dart
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Closes flutter#171637 As mentioned in the issue, I am proposing a new argument to the flutter build web command: `--static-assets-url`. This argument would accept a full URL string ending with `/` as its value. During the build process, the Flutter tool would use this value to replace a dedicated placeholder within the `web/index.html` file (inspired by `--base-href` approach). Example Implementation: A developer would modify their `web/index.html` to use a new placeholder, for instance, `$FLUTTER_STATIC_ASSETS_URL`: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "$FLUTTER_STATIC_ASSETS_URL", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "$FLUTTER_STATIC_ASSETS_URL", }); await appRunner.runApp(); }, }); </script> </body> ... ``` The build command would be run with the new flag: `flutter build web --static-assets-url="https://static.company.com/some-webapp/“` - and the resulting `build/web/index.html` would have the placeholder replaced: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "https://static.company.com/some-webapp/", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "https://static.company.com/some-webapp/", }); await appRunner.runApp(); }, }); </script> </body> ... ```
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flutter/flutter@92a6bfb...3821790 2025-08-08 [email protected] Use LLDB as the default debugging method for iOS 17+ and Xcode 26+ (flutter/flutter#173443) 2025-08-08 [email protected] Roll Fuchsia Linux SDK from i4vsuEGyP8Xeb5tiy... to HclTm0V8hgSpfqmtG... (flutter/flutter#173462) 2025-08-08 [email protected] Support launching a HTTPS URL (flutter/flutter#164720) 2025-08-08 [email protected] Roll Dart SDK from c48772a79e1f to 4b7b565eb468 (1 revision) (flutter/flutter#173454) 2025-08-08 [email protected] Roll Dart SDK from ba58b96a80d7 to c48772a79e1f (3 revisions) (flutter/flutter#173451) 2025-08-07 [email protected] Web dev proxy (flutter/flutter#172175) 2025-08-07 [email protected] Roll ICU from b929596baebf to 1b2e3e8a421e (7 revisions) (flutter/flutter#173436) 2025-08-07 [email protected] [A11y] TextField prefix icon and suffix icon create a sibling node' (flutter/flutter#173312) 2025-08-07 [email protected] [Android templates] Remove jetifier usage (flutter/flutter#173431) 2025-08-07 [email protected] Remove a couple of asserts from display_list_unittest (flutter/flutter#173381) 2025-08-07 [email protected] Fix ScaffoldGeometry null scale with noAnimation FAB (flutter/flutter#172914) 2025-08-07 [email protected] Prepare for iOS debugging with lldb and devicectl (flutter/flutter#173417) 2025-08-07 [email protected] Fix `ReorderableList` proxy animation for partial drag-back (flutter/flutter#172380) 2025-08-07 [email protected] [ios26]Do not report error for Info.plist key not found (flutter/flutter#172913) 2025-08-07 [email protected] Manual roll to 3.10.0-75.1.beta (flutter/flutter#173423) 2025-08-07 [email protected] [web] add --static-assets-url argument to build web (flutter/flutter#171638) 2025-08-07 [email protected] Adds deprecation for impeller opt out on android (flutter/flutter#173375) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Closes flutter#171637 As mentioned in the issue, I am proposing a new argument to the flutter build web command: `--static-assets-url`. This argument would accept a full URL string ending with `/` as its value. During the build process, the Flutter tool would use this value to replace a dedicated placeholder within the `web/index.html` file (inspired by `--base-href` approach). Example Implementation: A developer would modify their `web/index.html` to use a new placeholder, for instance, `$FLUTTER_STATIC_ASSETS_URL`: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "$FLUTTER_STATIC_ASSETS_URL", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "$FLUTTER_STATIC_ASSETS_URL", }); await appRunner.runApp(); }, }); </script> </body> ... ``` The build command would be run with the new flag: `flutter build web --static-assets-url="https://static.company.com/some-webapp/“` - and the resulting `build/web/index.html` would have the placeholder replaced: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "https://static.company.com/some-webapp/", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "https://static.company.com/some-webapp/", }); await appRunner.runApp(); }, }); </script> </body> ... ```
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Closes flutter#171637 As mentioned in the issue, I am proposing a new argument to the flutter build web command: `--static-assets-url`. This argument would accept a full URL string ending with `/` as its value. During the build process, the Flutter tool would use this value to replace a dedicated placeholder within the `web/index.html` file (inspired by `--base-href` approach). Example Implementation: A developer would modify their `web/index.html` to use a new placeholder, for instance, `$FLUTTER_STATIC_ASSETS_URL`: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "$FLUTTER_STATIC_ASSETS_URL", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "$FLUTTER_STATIC_ASSETS_URL", }); await appRunner.runApp(); }, }); </script> </body> ... ``` The build command would be run with the new flag: `flutter build web --static-assets-url="https://static.company.com/some-webapp/“` - and the resulting `build/web/index.html` would have the placeholder replaced: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "https://static.company.com/some-webapp/", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "https://static.company.com/some-webapp/", }); await appRunner.runApp(); }, }); </script> </body> ... ```
korca0220
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Sep 22, 2025
Closes flutter#171637 As mentioned in the issue, I am proposing a new argument to the flutter build web command: `--static-assets-url`. This argument would accept a full URL string ending with `/` as its value. During the build process, the Flutter tool would use this value to replace a dedicated placeholder within the `web/index.html` file (inspired by `--base-href` approach). Example Implementation: A developer would modify their `web/index.html` to use a new placeholder, for instance, `$FLUTTER_STATIC_ASSETS_URL`: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "$FLUTTER_STATIC_ASSETS_URL", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "$FLUTTER_STATIC_ASSETS_URL", }); await appRunner.runApp(); }, }); </script> </body> ... ``` The build command would be run with the new flag: `flutter build web --static-assets-url="https://static.company.com/some-webapp/“` - and the resulting `build/web/index.html` would have the placeholder replaced: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "https://static.company.com/some-webapp/", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "https://static.company.com/some-webapp/", }); await appRunner.runApp(); }, }); </script> </body> ... ```
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lucaantonelli
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Nov 21, 2025
Closes flutter#171637 As mentioned in the issue, I am proposing a new argument to the flutter build web command: `--static-assets-url`. This argument would accept a full URL string ending with `/` as its value. During the build process, the Flutter tool would use this value to replace a dedicated placeholder within the `web/index.html` file (inspired by `--base-href` approach). Example Implementation: A developer would modify their `web/index.html` to use a new placeholder, for instance, `$FLUTTER_STATIC_ASSETS_URL`: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "$FLUTTER_STATIC_ASSETS_URL", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "$FLUTTER_STATIC_ASSETS_URL", }); await appRunner.runApp(); }, }); </script> </body> ... ``` The build command would be run with the new flag: `flutter build web --static-assets-url="https://static.company.com/some-webapp/“` - and the resulting `build/web/index.html` would have the placeholder replaced: ```html ... <body> <script> {{flutter_js}} {{flutter_build_config}} _flutter.loader.load({ config: { entryPointBaseUrl: "https://static.company.com/some-webapp/", }, onEntrypointLoaded: async function (engineInitializer) { const appRunner = await engineInitializer.initializeEngine({ assetBase: "https://static.company.com/some-webapp/", }); await appRunner.runApp(); }, }); </script> </body> ... ```
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Closes #171637
As mentioned in the issue, I am proposing a new argument to the flutter build web command:
--static-assets-url.This argument would accept a full URL string ending with
/as its value. During the build process, the Flutter tool would use this value to replace a dedicated placeholder within theweb/index.htmlfile (inspired by--base-hrefapproach).Example Implementation:
A developer would modify their
web/index.htmlto use a new placeholder, for instance,$FLUTTER_STATIC_ASSETS_URL:The build command would be run with the new flag:
flutter build web --static-assets-url="https://static.company.com/some-webapp/“- and the resultingbuild/web/index.htmlwould have the placeholder replaced: