Feature to use locally downloaded libvips

docs/install.md

@@ -118,6 +118,8 @@ Building from source requires:
 
 This is an advanced approach that most people will not require.
 
+### Prebuilt sharp binaries
+
 To install the prebuilt sharp binaries from a custom URL,
 set the `sharp_binary_host` npm config option
 or the `npm_config_sharp_binary_host` environment variable.
@@ -126,10 +128,16 @@ To install the prebuilt sharp binaries from a directory on the local filesystem,
 set the `sharp_local_prebuilds` npm config option
 or the `npm_config_sharp_local_prebuilds` environment variable.
 
+### Prebuilt libvips binaries
+
 To install the prebuilt libvips binaries from a custom URL,
 set the `sharp_libvips_binary_host` npm config option
 or the `npm_config_sharp_libvips_binary_host` environment variable.
 
+To install the prebuilt libvips binaries from a directory on the local filesystem,
+set the `sharp_libvips_local_prebuilds` npm config option
+or the `npm_config_sharp_libvips_local_prebuilds` environment variable.
+
 The version subpath and file name are appended to these.
 For example, if `sharp_libvips_binary_host` is set to `https://hostname/path`
 and the libvips version is `1.2.3` then the resultant URL will be

install/libvips.js

@@ -35,6 +35,7 @@ const hasSharpPrebuild = [
 ];
 
 const { minimumLibvipsVersion, minimumLibvipsVersionLabelled } = libvips;
+const localLibvipsDir = process.env.npm_config_sharp_libvips_local_prebuilds || '';
 const distHost = process.env.npm_config_sharp_libvips_binary_host || 'https://github.com/lovell/sharp-libvips/releases/download';
 const distBaseUrl = process.env.npm_config_sharp_dist_base_url || process.env.SHARP_DIST_BASE_URL || `${distHost}/v${minimumLibvipsVersionLabelled}/`;
 const installationForced = !!(process.env.npm_config_sharp_install_force || process.env.SHARP_INSTALL_FORCE);
@@ -156,6 +157,11 @@ try {
     if (fs.existsSync(tarPathCache)) {
       libvips.log(`Using cached ${tarPathCache}`);
       extractTarball(tarPathCache, platformAndArch);
+    } else if (localLibvipsDir) {
+      // If localLibvipsDir is given try to use binaries from local directory
+      const tarPathLocal = path.join(path.resolve(localLibvipsDir), `v${minimumLibvipsVersionLabelled}`, tarFilename);
+      libvips.log(`Using local libvips from ${tarPathLocal}`);
+      extractTarball(tarPathLocal, platformAndArch);
     } else {
       const url = distBaseUrl + tarFilename;
       libvips.log(`Downloading ${url}`);

package.json

@@ -82,7 +82,8 @@
     "Joris Dugué <zaruike10@gmail.com>",
     "Chris Banks <christopher.bradley.banks@gmail.com>",
     "Ompal Singh <ompal.hitm09@gmail.com>",
-    "Brodan <christopher.hranj@gmail.com"
+    "Brodan <christopher.hranj@gmail.com",
+    "Ankur Parihar <ankur.github@gmail.com>"
   ],
   "scripts": {
     "install": "(node install/libvips && node install/dll-copy && prebuild-install) || (node install/can-compile && node-gyp rebuild && node install/dll-copy)",