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feat(plugin): Make metadata api lazy (swc-project#5310)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| use std::env; | ||
|
|
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| use crate::collections::AHashMap; | ||
|
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| /// Indexable key to the metadata context for a transform plugin, avoiding | ||
| /// serialization & allocation to the host by using incremental number. | ||
| /// TransformPluginMetadataContext does not implement Index trait, instead | ||
| /// host does manual matching to corresponding value. | ||
| #[derive(Copy, Clone)] | ||
| pub enum TransformPluginMetadataContextKind { | ||
| // This value always should increase, even if some keys are removed in the | ||
| // future. | ||
| Filename = 1, | ||
| Env = 2, | ||
| Cwd = 3, | ||
| } | ||
|
|
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| impl From<u32> for TransformPluginMetadataContextKind { | ||
| fn from(key: u32) -> TransformPluginMetadataContextKind { | ||
| match key { | ||
| 1 => TransformPluginMetadataContextKind::Filename, | ||
| 2 => TransformPluginMetadataContextKind::Env, | ||
| 3 => TransformPluginMetadataContextKind::Cwd, | ||
| _ => panic!("Invalid TransformPluginMetadataContextKind key"), | ||
| } | ||
| } | ||
| } | ||
|
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| /* | ||
| impl TransformPluginMetadataContextKind { | ||
| pub fn from(key: u32) -> TransformPluginMetadataContextKind { | ||
| match key { | ||
| 1 => TransformPluginMetadataContextKind::Filename, | ||
| 2 => TransformPluginMetadataContextKind::Env, | ||
| 3 => TransformPluginMetadataContextKind::Cwd, | ||
| _ => panic!("Invalid TransformPluginMetadataContextKind key"), | ||
| } | ||
| } | ||
| } | ||
| impl Into<u32> for TransformPluginMetadataContextKind { | ||
| fn into(self) -> u32 { | ||
| match self { | ||
| TransformPluginMetadataContextKind::Filename => 1, | ||
| TransformPluginMetadataContextKind::Env => 2, | ||
| TransformPluginMetadataContextKind::Cwd => 3, | ||
| } | ||
| } | ||
| }*/ | ||
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| /// Host side metadata context plugin may need to access. | ||
| /// This is a global context - any plugin in single transform will have same | ||
| /// values. | ||
| pub struct TransformPluginMetadataContext { | ||
| /// The path of the file being processed. This includes all of the path as | ||
| /// much as possible. | ||
| pub filename: Option<String>, | ||
| /// The current environment resolved as process.env.SWC_ENV || | ||
| /// process.env.NODE_ENV || "development" | ||
| pub env: String, | ||
| /// The current working directory. | ||
| pub cwd: Option<String>, | ||
| pub experimental: AHashMap<String, String>, | ||
| } | ||
|
|
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| impl TransformPluginMetadataContext { | ||
| pub fn new( | ||
| filename: Option<String>, | ||
| env: String, | ||
| experimental: Option<AHashMap<String, String>>, | ||
| ) -> Self { | ||
| TransformPluginMetadataContext { | ||
| filename, | ||
| env, | ||
| cwd: env::current_dir() | ||
| .map(|cwd| cwd.as_path().to_string_lossy().to_string()) | ||
| .ok(), | ||
| experimental: experimental.unwrap_or_default(), | ||
| } | ||
| } | ||
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| pub fn get(&self, key: &TransformPluginMetadataContextKind) -> Option<String> { | ||
| match key { | ||
| TransformPluginMetadataContextKind::Filename => self.filename.clone(), | ||
| TransformPluginMetadataContextKind::Env => Some(self.env.clone()), | ||
| TransformPluginMetadataContextKind::Cwd => self.cwd.clone(), | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| pub mod metadata; | ||
| #[cfg(feature = "plugin-base")] | ||
| #[cfg_attr(docsrs, doc(cfg(feature = "plugin-base")))] | ||
| pub mod serialized; |
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