feat(tools)!: SnapOtter 2.0 phase 4 wave 1: 45 core tools across all modalities (#219)

2026-08-03 07:46:42 +02:00 · 2026-06-13 10:18:49 +08:00
parent d647d8ed19
commit ae1337901d
115 changed files with 10026 additions and 924 deletions
@@ -0,0 +1,55 @@
+import { spawn } from "node:child_process";
+import { resolveGs } from "./binaries.js";
+
+export type PdfCompressionPreset = "screen" | "ebook" | "printer";
+
+/** Ghostscript re-distillation with a quality preset; 120s hard kill. */
+export async function gsCompressPdf(
+  inputPath: string,
+  outPath: string,
+  preset: PdfCompressionPreset,
+): Promise<void> {
+  const bin = resolveGs();
+  if (!bin) throw new Error("gs binary not found (set GS_PATH or install ghostscript)");
+  await new Promise<void>((resolvePromise, reject) => {
+    const child = spawn(
+      bin,
+      [
+        "-dSAFER",
+        "-dBATCH",
+        "-dNOPAUSE",
+        "-dQUIET",
+        "-sDEVICE=pdfwrite",
+        `-dPDFSETTINGS=/${preset}`,
+        "-dCompatibilityLevel=1.6",
+        `-sOutputFile=${outPath}`,
+        inputPath,
+      ],
+      { stdio: ["ignore", "ignore", "pipe"] },
+    );
+    let err = "";
+    let settled = false;
+    const timer = setTimeout(() => {
+      if (settled) return;
+      settled = true;
+      child.kill("SIGKILL");
+      reject(new Error("ghostscript timed out after 120s"));
+    }, 120_000);
+    child.stderr.on("data", (c: Buffer) => {
+      err = (err + c.toString("utf8")).slice(-4096);
+    });
+    child.on("error", (e) => {
+      if (settled) return;
+      settled = true;
+      clearTimeout(timer);
+      reject(e);
+    });
+    child.on("close", (code, signal) => {
+      if (settled) return;
+      settled = true;
+      clearTimeout(timer);
+      if (code === 0) resolvePromise();
+      else reject(new Error(`gs exited ${code ?? signal}: ${err.slice(-1000)}`));
+    });
+  });
+}