feat!: move getCustomDataKey to Linker

.yarn/versions/fd50b4cb.yml

@@ -0,0 +1,34 @@
+releases:
+  "@yarnpkg/core": major
+  "@yarnpkg/plugin-nm": patch
+  "@yarnpkg/plugin-pnp": patch
+  "@yarnpkg/plugin-pnpm": patch
+
+declined:
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-exec"
+  - "@yarnpkg/plugin-file"
+  - "@yarnpkg/plugin-git"
+  - "@yarnpkg/plugin-github"
+  - "@yarnpkg/plugin-http"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-link"
+  - "@yarnpkg/plugin-npm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/cli"
+  - "@yarnpkg/doctor"
+  - "@yarnpkg/extensions"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"

CHANGELOG.md

@@ -31,6 +31,8 @@ The following changes only affect people writing Yarn plugins:
 
 - The `generateLoader` function in `@yarnpkg/pnp` no longer generates the `$$SETUP_STATE` function, it now needs to be present in the `loader` passed to the function.
 
+- The `getCustomDataKey` function in `Installer` from `@yarnpkg/core` has been moved to `Linker`.
+
 ### Compatibility
 
 - The patched filesystem now supports `ftruncate`.

packages/plugin-nm/sources/NodeModulesLinker.ts

@@ -34,6 +34,13 @@ export enum NodeModulesMode {
 export class NodeModulesLinker implements Linker {
   private installStateCache: Map<string, Promise<InstallState | null>> = new Map();
 
+  getCustomDataKey() {
+    return JSON.stringify({
+      name: `NodeModulesLinker`,
+      version: 2,
+    });
+  }
+
   supportsPackage(pkg: Package, opts: MinimalLinkOptions) {
     return this.isEnabled(opts);
   }
@@ -119,13 +126,6 @@ class NodeModulesInstaller implements Installer {
     // Nothing to do
   }
 
-  getCustomDataKey() {
-    return JSON.stringify({
-      name: `NodeModulesInstaller`,
-      version: 2,
-    });
-  }
-
   private customData: {
     store: Map<LocatorHash, CustomPackageData>;
   } = {

packages/plugin-pnp/sources/PnpLinker.ts

@@ -24,6 +24,13 @@ export class PnpLinker implements Linker {
 
   private pnpCache: Map<string, PnpApi> = new Map();
 
+  getCustomDataKey() {
+    return JSON.stringify({
+      name: `PnpLinker`,
+      version: 2,
+    });
+  }
+
   supportsPackage(pkg: Package, opts: MinimalLinkOptions) {
     return this.isEnabled(opts);
   }
@@ -101,13 +108,6 @@ export class PnpInstaller implements Installer {
     this.opts = opts;
   }
 
-  getCustomDataKey() {
-    return JSON.stringify({
-      name: `PnpInstaller`,
-      version: 2,
-    });
-  }
-
   private customData: {
     store: Map<LocatorHash, CustomPackageData>;
   } = {

packages/plugin-pnpm/sources/PnpmLinker.ts

@@ -9,6 +9,13 @@ export type PnpmCustomData = {
 };
 
 export class PnpmLinker implements Linker {
+  getCustomDataKey() {
+    return JSON.stringify({
+      name: `PnpmLinker`,
+      version: 2,
+    });
+  }
+
   supportsPackage(pkg: Package, opts: MinimalLinkOptions) {
     return this.isEnabled(opts);
   }
@@ -17,8 +24,8 @@ export class PnpmLinker implements Linker {
     if (!this.isEnabled(opts))
       throw new Error(`Assertion failed: Expected the pnpm linker to be enabled`);
 
-    const customDataKey = getCustomDataKey();
-    const customData = opts.project.installersCustomData.get(customDataKey) as PnpmCustomData | undefined;
+    const customDataKey = this.getCustomDataKey();
+    const customData = opts.project.linkersCustomData.get(customDataKey) as PnpmCustomData | undefined;
     if (!customData)
       throw new UsageError(`The project in ${formatUtils.pretty(opts.project.configuration, `${opts.project.cwd}/package.json`, formatUtils.Type.PATH)} doesn't seem to have been installed - running an install there might help`);
 
@@ -33,8 +40,8 @@ export class PnpmLinker implements Linker {
     if (!this.isEnabled(opts))
       return null;
 
-    const customDataKey = getCustomDataKey();
-    const customData = opts.project.installersCustomData.get(customDataKey) as any;
+    const customDataKey = this.getCustomDataKey();
+    const customData = opts.project.linkersCustomData.get(customDataKey) as any;
     if (!customData)
       throw new UsageError(`The project in ${formatUtils.pretty(opts.project.configuration, `${opts.project.cwd}/package.json`, formatUtils.Type.PATH)} doesn't seem to have been installed - running an install there might help`);
 
@@ -77,10 +84,6 @@ class PnpmInstaller implements Installer {
     // Nothing to do
   }
 
-  getCustomDataKey() {
-    return getCustomDataKey();
-  }
-
   private customData: PnpmCustomData = {
     pathByLocator: new Map(),
     locatorByPath: new Map(),
@@ -286,13 +289,6 @@ class PnpmInstaller implements Installer {
   }
 }
 
-function getCustomDataKey() {
-  return JSON.stringify({
-    name: `PnpmInstaller`,
-    version: 2,
-  });
-}
-
 function getNodeModulesLocation(project: Project) {
   return ppath.join(project.cwd, Filename.nodeModules);
 }

packages/yarnpkg-core/sources/Installer.ts

@@ -71,18 +71,6 @@ export type InstallPackageExtraApi = {
 };
 
 export interface Installer {
-  /**
-   * Return an arbitrary key.
-   *
-   * This key will be used to save and restore the installer's custom data. You
-   * typically will want to return the installer's name, but you can be fancy
-   * and send a stringified JSON payload that include the cache version, etc.
-   *
-   * TODO (Yarn 4): Move this method into `Linker` so that linkers can use it
-   * to save some state useful to findPackageLocator (cf PnpmLinker).
-   */
-  getCustomDataKey(): string;
-
   /**
    * Only called if the installer has a custom data key matching one currently
    * stored. Will be called with whatever `finalizeInstall` returned in its

packages/yarnpkg-core/sources/Linker.ts

@@ -69,6 +69,15 @@ export interface Linker {
    */
   findPackageLocator(location: PortablePath, opts: LinkOptions): Promise<Locator | null>;
 
+  /**
+   * Return an arbitrary key.
+   *
+   * This key will be used to save and restore the installer's custom data. You
+   * typically will want to return the installer's name, but you can be fancy
+   * and send a stringified JSON payload that include the cache version, etc.
+   */
+  getCustomDataKey(): string;
+
   /**
    * This function must instantiate an Installer object that describes how to
    * install the packages on the disk. Check the Installer file for more

packages/yarnpkg-core/sources/Project.ts

@@ -138,8 +138,8 @@ export type InstallOptions = {
 };
 
 const INSTALL_STATE_FIELDS = {
-  restoreInstallersCustomData: [
-    `installersCustomData`,
+  restoreLinkersCustomData: [
+    `linkersCustomData`,
   ] as const,
 
   restoreResolutions: [
@@ -223,10 +223,10 @@ export class Project {
   public peerRequirements: Map<string, PeerRequirement> = new Map();
 
   /**
-   * Contains whatever data the installers (cf `Linker.ts`) want to persist
+   * Contains whatever data the linkers (cf `Linker.ts`) want to persist
    * from an install to another.
    */
-  public installersCustomData: Map<string, unknown> = new Map();
+  public linkersCustomData: Map<string, unknown> = new Map();
 
   /**
    * Those checksums are used to detect whether the relevant files actually
@@ -1048,8 +1048,8 @@ export class Project {
     const installers = new Map(linkers.map(linker => {
       const installer = linker.makeInstaller(linkerOptions);
 
-      const customDataKey = installer.getCustomDataKey();
-      const customData = this.installersCustomData.get(customDataKey);
+      const customDataKey = linker.getCustomDataKey();
+      const customData = this.linkersCustomData.get(customDataKey);
       if (typeof customData !== `undefined`)
         installer.attachCustomData(customData);
 
@@ -1246,9 +1246,9 @@ export class Project {
 
     // Step 3: Inform our linkers that they should have all the info needed
 
-    const installersCustomData = new Map();
+    const linkersCustomData = new Map();
 
-    for (const installer of installers.values()) {
+    for (const [linker, installer] of installers) {
       const finalizeInstallData = await installer.finalizeInstall();
 
       for (const installStatus of finalizeInstallData?.records ?? []) {
@@ -1259,11 +1259,11 @@ export class Project {
       }
 
       if (typeof finalizeInstallData?.customData !== `undefined`) {
-        installersCustomData.set(installer.getCustomDataKey(), finalizeInstallData.customData);
+        linkersCustomData.set(linker.getCustomDataKey(), finalizeInstallData.customData);
       }
     }
 
-    this.installersCustomData = installersCustomData;
+    this.linkersCustomData = linkersCustomData;
 
     await miscUtils.allSettledSafe(pendingPromises);
 
@@ -1789,7 +1789,7 @@ export class Project {
     this.installStateChecksum = newInstallStateChecksum;
   }
 
-  async restoreInstallState({restoreInstallersCustomData = true, restoreResolutions = true, restoreBuildState = true}: RestoreInstallStateOpts = {}) {
+  async restoreInstallState({restoreLinkersCustomData = true, restoreResolutions = true, restoreBuildState = true}: RestoreInstallStateOpts = {}) {
     const installStatePath = this.configuration.get(`installStatePath`);
 
     let installState: InstallState;
@@ -1805,9 +1805,9 @@ export class Project {
       return;
     }
 
-    if (restoreInstallersCustomData)
-      if (typeof installState.installersCustomData !== `undefined`)
-        this.installersCustomData = installState.installersCustomData;
+    if (restoreLinkersCustomData)
+      if (typeof installState.linkersCustomData !== `undefined`)
+        this.linkersCustomData = installState.linkersCustomData;
 
     if (restoreBuildState)
       Object.assign(this, pick(installState, INSTALL_STATE_FIELDS.restoreBuildState));