Initial Save

node_modules/fs-capacitor/lib/index.mjs

@@ -0,0 +1,206 @@
+import crypto from "crypto";
+import fs from "fs";
+import os from "os";
+import path from "path";
+export class ReadAfterDestroyedError extends Error {}
+export class ReadStream extends fs.ReadStream {
+  constructor(writeStream, name) {
+    super("", {});
+    this.name = name;
+    this._writeStream = writeStream;
+    this.error = this._writeStream.error;
+    this.addListener("error", error => {
+      this.error = error;
+    });
+    this.open();
+  }
+
+  get ended() {
+    return this._readableState.ended;
+  }
+
+  _read(n) {
+    if (typeof this.fd !== "number")
+      return this.once("open", function() {
+        this._read(n);
+      });
+    if (this._writeStream.finished || this._writeStream.closed)
+      return super._read(n);
+    const unread = this._writeStream.bytesWritten - this.bytesRead;
+
+    if (unread === 0) {
+      const retry = () => {
+        this._writeStream.removeListener("finish", retry);
+
+        this._writeStream.removeListener("write", retry);
+
+        this._read(n);
+      };
+
+      this._writeStream.addListener("finish", retry);
+
+      this._writeStream.addListener("write", retry);
+
+      return;
+    }
+
+    return super._read(Math.min(n, unread));
+  }
+
+  _destroy(error, callback) {
+    if (typeof this.fd !== "number") {
+      this.once("open", this._destroy.bind(this, error, callback));
+      return;
+    }
+
+    fs.close(this.fd, closeError => {
+      callback(closeError || error);
+      this.fd = null;
+      this.closed = true;
+      this.emit("close");
+    });
+  }
+
+  open() {
+    if (!this._writeStream) return;
+
+    if (typeof this._writeStream.fd !== "number") {
+      this._writeStream.once("open", () => this.open());
+
+      return;
+    }
+
+    this.path = this._writeStream.path;
+    super.open();
+  }
+}
+export class WriteStream extends fs.WriteStream {
+  constructor() {
+    super("", {
+      autoClose: false
+    });
+    this._readStreams = new Set();
+    this.error = null;
+
+    this._cleanupSync = () => {
+      process.removeListener("exit", this._cleanupSync);
+      process.removeListener("SIGINT", this._cleanupSync);
+      if (typeof this.fd === "number")
+        try {
+          fs.closeSync(this.fd);
+        } catch (error) {}
+
+      try {
+        fs.unlinkSync(this.path);
+      } catch (error) {}
+    };
+  }
+
+  get finished() {
+    return this._writableState.finished;
+  }
+
+  open() {
+    crypto.randomBytes(16, (error, buffer) => {
+      if (error) {
+        this.destroy(error);
+        return;
+      }
+
+      this.path = path.join(
+        os.tmpdir(),
+        `capacitor-${buffer.toString("hex")}.tmp`
+      );
+      fs.open(this.path, "wx", this.mode, (error, fd) => {
+        if (error) {
+          this.destroy(error);
+          return;
+        }
+
+        process.addListener("exit", this._cleanupSync);
+        process.addListener("SIGINT", this._cleanupSync);
+        this.fd = fd;
+        this.emit("open", fd);
+        this.emit("ready");
+      });
+    });
+  }
+
+  _write(chunk, encoding, callback) {
+    super._write(chunk, encoding, error => {
+      if (!error) this.emit("write");
+      callback(error);
+    });
+  }
+
+  _destroy(error, callback) {
+    if (typeof this.fd !== "number") {
+      this.once("open", this._destroy.bind(this, error, callback));
+      return;
+    }
+
+    process.removeListener("exit", this._cleanupSync);
+    process.removeListener("SIGINT", this._cleanupSync);
+
+    const unlink = error => {
+      fs.unlink(this.path, unlinkError => {
+        callback(unlinkError || error);
+        this.fd = null;
+        this.closed = true;
+        this.emit("close");
+      });
+    };
+
+    if (typeof this.fd === "number") {
+      fs.close(this.fd, closeError => {
+        unlink(closeError || error);
+      });
+      return;
+    }
+
+    unlink(error);
+  }
+
+  destroy(error, callback) {
+    if (error) this.error = error;
+    if (this.destroyed) return super.destroy(error, callback);
+    if (typeof callback === "function")
+      this.once("close", callback.bind(this, error));
+
+    if (this._readStreams.size === 0) {
+      super.destroy(error, callback);
+      return;
+    }
+
+    this._destroyPending = true;
+    if (error)
+      for (let readStream of this._readStreams) readStream.destroy(error);
+  }
+
+  createReadStream(name) {
+    if (this.destroyed)
+      throw new ReadAfterDestroyedError(
+        "A ReadStream cannot be created from a destroyed WriteStream."
+      );
+    const readStream = new ReadStream(this, name);
+
+    this._readStreams.add(readStream);
+
+    const remove = () => {
+      this._deleteReadStream(readStream);
+
+      readStream.removeListener("end", remove);
+      readStream.removeListener("close", remove);
+    };
+
+    readStream.addListener("end", remove);
+    readStream.addListener("close", remove);
+    return readStream;
+  }
+
+  _deleteReadStream(readStream) {
+    if (this._readStreams.delete(readStream) && this._destroyPending)
+      this.destroy();
+  }
+}
+export default WriteStream;