From 779e320fb7e9c1a0ab195903ecde9245c159b46b Mon Sep 17 00:00:00 2001
From: Victor Soares <vitorsoares96@hotmail.com>
Date: Thu, 25 May 2023 09:04:40 -0300
Subject: [PATCH] :sparkles: feature: add gsModulePath option

---
 package.json    |  2 +-
 src/compress.ts | 20 ++++++++++++++------
 src/types.ts    |  1 +
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/package.json b/package.json
index 65b6b4b..1c02e72 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "compress-pdf",
-  "version": "0.3.3",
+  "version": "0.3.4",
   "templateVersion": "1.3.0",
   "description": "An compress pdf library using ghostscript",
   "main": "dist/index.js",
diff --git a/src/compress.ts b/src/compress.ts
index 42a8264..f2ed135 100644
--- a/src/compress.ts
+++ b/src/compress.ts
@@ -14,14 +14,18 @@ const defaultOptions: Required<Options> = {
   compatibilityLevel: 1.4,
   resolution: 'ebook',
   imageQuality: 100,
+  gsModulePath: '',
   binPath: getBinPath(os.platform()),
 };
 
 async function compress(file: string | Buffer, options?: Options) {
-  const { resolution, imageQuality, compatibilityLevel, binPath } = defaults(
-    options,
-    defaultOptions
-  );
+  const {
+    resolution,
+    imageQuality,
+    compatibilityLevel,
+    binPath,
+    gsModulePath,
+  } = defaults(options, defaultOptions);
 
   const output = path.resolve(os.tmpdir(), Date.now().toString());
   const gsModule = getGSModulePath(binPath, os.platform());
@@ -30,13 +34,17 @@ async function compress(file: string | Buffer, options?: Options) {
   let tempFile: string | undefined;
 
   if (typeof file === 'string') {
-    command = `${gsModule} -q -dNOPAUSE -dBATCH -dSAFER -dSimulateOverprint=true -sDEVICE=pdfwrite -dCompatibilityLevel=${compatibilityLevel} -dPDFSETTINGS=/${resolution} -dEmbedAllFonts=true -dSubsetFonts=true -dAutoRotatePages=/None -dColorImageDownsampleType=/Bicubic -dColorImageResolution=${imageQuality} -dGrayImageDownsampleType=/Bicubic -dGrayImageResolution=${imageQuality} -dMonoImageDownsampleType=/Bicubic -dMonoImageResolution=${imageQuality} -sOutputFile=${output} ${file}`;
+    command = `${
+      gsModulePath || gsModule
+    } -q -dNOPAUSE -dBATCH -dSAFER -dSimulateOverprint=true -sDEVICE=pdfwrite -dCompatibilityLevel=${compatibilityLevel} -dPDFSETTINGS=/${resolution} -dEmbedAllFonts=true -dSubsetFonts=true -dAutoRotatePages=/None -dColorImageDownsampleType=/Bicubic -dColorImageResolution=${imageQuality} -dGrayImageDownsampleType=/Bicubic -dGrayImageResolution=${imageQuality} -dMonoImageDownsampleType=/Bicubic -dMonoImageResolution=${imageQuality} -sOutputFile=${output} ${file}`;
   } else {
     tempFile = path.resolve(os.tmpdir(), (Date.now() * 2).toString());
 
     await fs.promises.writeFile(tempFile, file);
 
-    command = `${gsModule} -q -dNOPAUSE -dBATCH -dSAFER -dSimulateOverprint=true -sDEVICE=pdfwrite -dCompatibilityLevel=${compatibilityLevel} -dPDFSETTINGS=/${resolution} -dEmbedAllFonts=true -dSubsetFonts=true -dAutoRotatePages=/None -dColorImageDownsampleType=/Bicubic -dColorImageResolution=${imageQuality} -dGrayImageDownsampleType=/Bicubic -dGrayImageResolution=${imageQuality} -dMonoImageDownsampleType=/Bicubic -dMonoImageResolution=${imageQuality} -sOutputFile=${output} ${tempFile}`;
+    command = `${
+      gsModulePath || gsModule
+    } -q -dNOPAUSE -dBATCH -dSAFER -dSimulateOverprint=true -sDEVICE=pdfwrite -dCompatibilityLevel=${compatibilityLevel} -dPDFSETTINGS=/${resolution} -dEmbedAllFonts=true -dSubsetFonts=true -dAutoRotatePages=/None -dColorImageDownsampleType=/Bicubic -dColorImageResolution=${imageQuality} -dGrayImageDownsampleType=/Bicubic -dGrayImageResolution=${imageQuality} -dMonoImageDownsampleType=/Bicubic -dMonoImageResolution=${imageQuality} -sOutputFile=${output} ${tempFile}`;
   }
 
   await exec(command);
diff --git a/src/types.ts b/src/types.ts
index a136ea2..4d5255b 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -6,6 +6,7 @@ export type Resolution =
   | 'default';
 
 export type Options = {
+  gsModulePath?: string;
   compatibilityLevel?: number;
   /**
    * Can be