Remove install script, building from source is now opt-in

The vast majority of people don't need this. Package managers
are (correctly) starting to block install scripts by default,
so this change should reduce install-time warnings.

.gitignore

@@ -1,7 +1,6 @@
 src/build
 src/node_modules
 node_modules
-/coverage
 npm/*/*
 !npm/*/package.json
 test/bench/node_modules
@@ -9,7 +8,6 @@ test/fixtures/output*
 test/fixtures/vips-properties.xml
 test/leak/libvips.supp
 .DS_Store
-.nyc_output
 .vscode/
 package-lock.json
 .idea

docs/src/content/docs/changelog/v0.35.0.md

@@ -3,9 +3,12 @@ title: v0.35.0 - TBC
 slug: changelog/v0.35.0
 ---
 
-* Upgrade to libvips v8.18.0 for upstream bug fixes.
+* Breaking: Drop support for Node.js 18, now requires Node.js >= 20.9.0.
 
-* Drop support for Node.js 18, now requires Node.js >= 20.9.0.
+* Breaking: Remove `install` script from `package.json` file.
+  Compiling from source is now opt-in via the `build` script.
+
+* Upgrade to libvips v8.18.0 for upstream bug fixes.
 
 * Add `withGainMap` to process HDR JPEG images with embedded gain maps.
   [#4314](https://github.com/lovell/sharp/issues/4314)

docs/src/content/docs/install.md

@@ -20,10 +20,6 @@ npm install sharp
 pnpm add sharp
 ```
 
-When using `pnpm`, add `sharp` to
-[ignoredBuiltDependencies](https://pnpm.io/settings#ignoredbuiltdependencies)
-to silence warnings.
-
 ```sh frame="none"
 yarn add sharp
 ```
@@ -112,13 +108,13 @@ and on macOS when running Node.js under Rosetta.
 
 ## Building from source
 
-This module will be compiled from source when:
+```sh frame="none"
+npm install sharp
+npm explore sharp -- npm run build
+```
 
-* a globally-installed libvips is detected, or
+The build process will search for a globally-installed libvips.
-* using `npm explore sharp -- npm run build`, or
+This detection logic can be skipped by setting the
-* using the deprecated `npm run --build-from-source` at `npm install` time.
-
-The logic to detect a globally-installed libvips can be skipped by setting the
 `SHARP_IGNORE_GLOBAL_LIBVIPS` (never try to use it) or
 `SHARP_FORCE_GLOBAL_LIBVIPS` (always try to use it, even when missing or outdated)
 environment variables.
@@ -129,21 +125,12 @@ Building from source requires:
 * [node-addon-api](https://www.npmjs.com/package/node-addon-api) version 7+
 * [node-gyp](https://github.com/nodejs/node-gyp#installation) version 9+ and its dependencies
 
-There is an install-time check for these dependencies.
 If `node-addon-api` or `node-gyp` cannot be found, try adding them via:
 
 ```sh frame="none"
 npm install --save node-addon-api node-gyp
 ```
 
-When using `pnpm`, you may need to add `sharp` to
-[onlyBuiltDependencies](https://pnpm.io/settings#onlybuiltdependencies)
-to ensure the installation script can be run.
-
-For cross-compiling, the `--platform`, `--arch` and `--libc` npm flags
-(or the `npm_config_platform`, `npm_config_arch` and `npm_config_libc` environment variables)
-can be used to configure the target environment.
-
 ## WebAssembly
 
 Experimental support is provided for runtime environments that provide
@@ -166,10 +153,8 @@ as well as the additional [building from source](#building-from-source) dependen
 
 ```sh frame="none"
 pkg install -y pkgconf vips
-```
+npm install sharp
-
+npm explore sharp -- npm run build
-```sh frame="none"
-cd /usr/ports/graphics/vips/ && make install clean
 ```
 
 ## Linux memory allocator

install/build.js

@@ -10,7 +10,7 @@ const {
   spawnRebuild,
 } = require('../lib/libvips');
 
-log('Attempting to build from source via node-gyp');
+log('Building from source');
 log('See https://sharp.pixelplumbing.com/install#building-from-source');
 
 try {
@@ -29,7 +29,7 @@ try {
 }
 
 if (useGlobalLibvips(log)) {
-  log(`Detected globally-installed libvips v${globalLibvipsVersion()}`);
+  log(`Found globally-installed libvips v${globalLibvipsVersion()}`);
 }
 
 const status = spawnRebuild();

install/check.js

@@ -1,14 +0,0 @@
-/*!
-  Copyright 2013 Lovell Fuller and others.
-  SPDX-License-Identifier: Apache-2.0
-*/
-
-try {
-  const { useGlobalLibvips } = require('../lib/libvips');
-  if (useGlobalLibvips() || process.env.npm_config_build_from_source) {
-    process.exit(1);
-  }
-} catch (err) {
-  const summary = err.message.split(/\n/).slice(0, 1);
-  console.log(`sharp: skipping install check: ${summary}`);
-}

lib/sharp.js

@@ -73,6 +73,7 @@ if (sharp) {
   } else {
     help.push(
       `- Manually install libvips >= ${minimumLibvipsVersion}`,
+      '    See https://sharp.pixelplumbing.com/install#building-from-source',
       '- Add experimental WebAssembly-based dependencies:',
       '    npm install --cpu=wasm32 sharp',
       '    npm install @img/sharp-wasm32'

package.json

@@ -93,8 +93,7 @@
   ],
   "scripts": {
     "build": "node install/build.js",
-    "install": "node install/check.js || npm run build",
+    "clean": "rm -rf src/build/ test/fixtures/output.*",
-    "clean": "rm -rf src/build/ .nyc_output/ coverage/ test/fixtures/output.*",
     "test": "npm run lint && npm run test-unit",
     "lint": "npm run lint-cpp && npm run lint-js && npm run lint-types",
     "lint-cpp": "cpplint --quiet src/*.h src/*.cc",