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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,92 +1,75 @@ | ||
| use crate::{GradleBuildpack, GradleBuildpackError, GRADLE_TASK_NAME_HEROKU_START_DAEMON}; | ||
| use indoc::{formatdoc, indoc}; | ||
| use libcnb::build::BuildContext; | ||
| use libcnb::data::layer_content_metadata::LayerTypes; | ||
| use libcnb::data::layer_name; | ||
| use libcnb::generic::GenericMetadata; | ||
| use libcnb::layer::{ExistingLayerStrategy, Layer, LayerData, LayerResult, LayerResultBuilder}; | ||
| use libcnb::layer::{ | ||
| CachedLayerDefinition, InvalidMetadataAction, LayerState, RestoredLayerAction, | ||
| }; | ||
| use libcnb::layer_env::{LayerEnv, ModificationBehavior, Scope}; | ||
| use libcnb::Buildpack; | ||
| use libcnb::Env; | ||
| use std::fs; | ||
| use std::path::Path; | ||
|
|
||
| pub(crate) struct GradleHomeLayer; | ||
|
|
||
| impl Layer for GradleHomeLayer { | ||
| type Buildpack = GradleBuildpack; | ||
| type Metadata = GenericMetadata; | ||
|
|
||
| fn types(&self) -> LayerTypes { | ||
| LayerTypes { | ||
| launch: true, | ||
| pub(crate) fn handle_gradle_home_layer( | ||
| context: &BuildContext<GradleBuildpack>, | ||
| env: &mut Env, | ||
| ) -> libcnb::Result<(), GradleBuildpackError> { | ||
| let layer_ref = context.cached_layer( | ||
| layer_name!("home"), | ||
| CachedLayerDefinition { | ||
| build: true, | ||
| cache: true, | ||
| } | ||
| } | ||
| launch: true, | ||
| invalid_metadata_action: &|_| InvalidMetadataAction::DeleteLayer, | ||
| restored_layer_action: &|_: &GenericMetadata, _| RestoredLayerAction::KeepLayer, | ||
| }, | ||
| )?; | ||
|
|
||
| fn create( | ||
| &mut self, | ||
| _context: &BuildContext<Self::Buildpack>, | ||
| layer_path: &Path, | ||
| ) -> Result<LayerResult<Self::Metadata>, <Self::Buildpack as Buildpack>::Error> { | ||
| // https://docs.gradle.org/8.3/userguide/build_environment.html#sec:gradle_configuration_properties | ||
| fs::write( | ||
| layer_path.join("gradle.properties"), | ||
| indoc! {" | ||
| match layer_ref.state { | ||
| LayerState::Restored { .. } => { | ||
| // Remove daemon metadata from the cached directory. Among other things, it contains a list | ||
| // of PIDs from previous runs that will clutter up the output and aren't meaningful with | ||
| // containerized builds anyway. | ||
| let daemon_dir_path = layer_ref.path().join("daemon"); | ||
| if daemon_dir_path.is_dir() { | ||
| // We explicitly ignore potential errors since not being able to remove this directory | ||
| // should not fail the build as it's mostly for output cosmetics only. | ||
| let _ignored_result = fs::remove_dir_all(daemon_dir_path); | ||
| } | ||
| } | ||
| LayerState::Empty { .. } => { | ||
| // https://docs.gradle.org/8.3/userguide/build_environment.html#sec:gradle_configuration_properties | ||
| fs::write( | ||
| layer_ref.path().join("gradle.properties"), | ||
| indoc! {" | ||
| org.gradle.welcome=never | ||
| org.gradle.caching=true | ||
| "}, | ||
| ) | ||
| .map_err(GradleBuildpackError::WriteGradlePropertiesError)?; | ||
| ) | ||
| .map_err(GradleBuildpackError::WriteGradlePropertiesError)?; | ||
|
|
||
| // We're adding this empty task to all projects to ensure we have a task we can run when | ||
| // we start the Gradle daemon that doesn't side-effect or output anything to the console. | ||
| // https://docs.gradle.org/8.3/userguide/init_scripts.html | ||
| fs::write( | ||
| layer_path.join("init.gradle.kts"), | ||
| formatdoc! {" | ||
| // We're adding this empty task to all projects to ensure we have a task we can run when | ||
| // we start the Gradle daemon that doesn't side-effect or output anything to the console. | ||
| // https://docs.gradle.org/8.3/userguide/init_scripts.html | ||
| fs::write( | ||
| layer_ref.path().join("init.gradle.kts"), | ||
| formatdoc! {" | ||
| allprojects {{ | ||
| tasks.register(\"{task_name}\") | ||
| }}", | ||
| task_name = GRADLE_TASK_NAME_HEROKU_START_DAEMON | ||
| }, | ||
| ) | ||
| .map_err(GradleBuildpackError::WriteGradleInitScriptError)?; | ||
| task_name = GRADLE_TASK_NAME_HEROKU_START_DAEMON | ||
| }, | ||
| ) | ||
| .map_err(GradleBuildpackError::WriteGradleInitScriptError)?; | ||
|
|
||
| LayerResultBuilder::new(None) | ||
| .env(LayerEnv::new().chainable_insert( | ||
| layer_ref.write_env(LayerEnv::new().chainable_insert( | ||
| Scope::All, | ||
| ModificationBehavior::Override, | ||
| "GRADLE_USER_HOME", | ||
| layer_path, | ||
| )) | ||
| .build() | ||
| } | ||
|
|
||
| fn existing_layer_strategy( | ||
| &mut self, | ||
| _context: &BuildContext<Self::Buildpack>, | ||
| _layer_data: &LayerData<Self::Metadata>, | ||
| ) -> Result<ExistingLayerStrategy, <Self::Buildpack as Buildpack>::Error> { | ||
| Ok(ExistingLayerStrategy::Update) | ||
| } | ||
|
|
||
| fn update( | ||
| &mut self, | ||
| _context: &BuildContext<Self::Buildpack>, | ||
| layer_data: &LayerData<Self::Metadata>, | ||
| ) -> Result<LayerResult<Self::Metadata>, <Self::Buildpack as Buildpack>::Error> { | ||
| // Remove daemon metadata from the cached directory. Among other things, it contains a list | ||
| // of PIDs from previous runs that will clutter up the output and aren't meaningful with | ||
| // containerized builds anyway. | ||
| let daemon_dir_path = layer_data.path.join("daemon"); | ||
| if daemon_dir_path.is_dir() { | ||
| // We explicitly ignore potential errors since not being able to remove this directory | ||
| // should not fail the build as it's mostly for output cosmetics only. | ||
| let _ignored_result = fs::remove_dir_all(daemon_dir_path); | ||
| layer_ref.path(), | ||
| ))?; | ||
| } | ||
|
|
||
| LayerResultBuilder::new(layer_data.content_metadata.metadata.clone()) | ||
| .env(layer_data.env.clone()) | ||
| .build() | ||
| } | ||
|
|
||
| *env = layer_ref.read_env()?.apply(Scope::Build, env); | ||
| Ok(()) | ||
| } |
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