安装sharp包的注意事项

sharp包是基于node.js的高性能图片处理器

在使用npm安装sharp的时候，需要注意以下问题

• 使用镜像地址：

npm config set sharp_binary_host "https://npm.taobao.org/mirrors/sharp"
npm config set sharp_libvips_binary_host "https://npm.taobao.org/mirrors/sharp-libvips"
           

• 提前下载好sharp某版本号对应的libvips依赖包，放在npm的缓存路径中，通常这个路径是

  /Users/<username>/.npm/_libvips

  （在使用了nvm管理node版本的情况下）

如果没有提前下载好并放在缓存中，可能会出现如下的报错信息

info sharp Using cached /Users/<usernmae>/.npm/_libvips/libvips-8.10.0-darwin-x64.tar.br
ERR! sharp Decompression failed
info sharp Attempting to build from source via node-gyp but this may fail due to the above error
info sharp Please see https://sharp.pixelplumbing.com/install for required dependencies
  TOUCH Release/obj.target/libvips-cpp.stamp
  CC(target) Release/obj.target/nothing/node_modules/node-addon-api/nothing.o
  LIBTOOL-STATIC Release/nothing.a
  CXX(target) Release/obj.target/sharp/src/common.o
../src/common.cc:24:10: fatal error: 'vips/vips8' file not found
#include <vips/vips8>
         ^~~~~~~~~~~~
1 error generated.
make: *** [Release/obj.target/sharp/src/common.o] Error 1
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/Users/maxingyuan/.nvm/versions/node/v12.16.1/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:194:23)
gyp ERR! stack     at ChildProcess.emit (events.js:311:20)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
gyp ERR! System Darwin 19.6.0
gyp ERR! command "/Users/<usernmae>/.nvm/versions/node/v12.16.1/bin/node" "/Users/<usernmae>/.nvm/versions/node/v12.16.1/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/maxingyuan/.nvm/versions/node/v12.16.1/lib/node_modules/sharp
gyp ERR! node -v v12.16.1
gyp ERR! node-gyp -v v5.0.5
gyp ERR! not ok 
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] install: `(node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/<usernmae>/.npm/_logs/2020-11-11T07_51_13_893Z-debug.log