git clone 一个 vue 项目，npm install ，结果报错：

warn ajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.

没办法，解决呗，找一下日志。

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.9.0 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.9.0 postinstall 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!     E:\Java\nodejs\node_cache\_logs\2019-08-08T14_25_20_239Z-debug.log

解决办法

安装对应版本

npm install ajv@^6.0.0

npm install node-sass@4.9.0

如果报错，是不是却少python环境

最后在，安装 node_modules

npm install

具体报错详细信息：

..............
3192 silly saveTree     | | +-- get-stream@3.0.0
3192 silly saveTree     | | +-- is-stream@1.1.0
3192 silly saveTree     | | +-- npm-run-path@2.0.2
3192 silly saveTree     | | | `-- path-key@2.0.1
3192 silly saveTree     | | +-- p-finally@1.0.0
3192 silly saveTree     | | `-- strip-eof@1.0.0
3192 silly saveTree     | `-- mem@1.1.0
3192 silly saveTree     +-- read-pkg-up@2.0.0
3192 silly saveTree     | `-- read-pkg@2.0.0
3192 silly saveTree     |   +-- load-json-file@2.0.0
3192 silly saveTree     |   | +-- pify@2.3.0
3192 silly saveTree     |   | `-- strip-bom@3.0.0
3192 silly saveTree     |   `-- path-type@2.0.0
3192 silly saveTree     |     `-- pify@2.3.0
3192 silly saveTree     +-- which-module@2.0.0
3192 silly saveTree     +-- y18n@3.2.1
3192 silly saveTree     `-- yargs-parser@7.0.0
3192 silly saveTree       `-- camelcase@4.1.0
3193 warn ajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.
3194 warn echarts-liquidfill@2.0.3 requires a peer of echarts@^4.1.0 but none is installed. You must install peer dependencies yourself.
3195 warn v-charts@1.19.0 requires a peer of echarts@>3.0.0 but none is installed. You must install peer dependencies yourself.
3196 warn optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.3 (node_modules\fsevents):
3197 warn notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
3198 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Valid OS:    darwin
3198 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Valid Arch:  any
3198 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Actual OS:   win32
3198 verbose notsup SKIPPING OPTIONAL DEPENDENCY: Actual Arch: x64
3199 verbose stack Error: node-sass@4.9.0 postinstall: `node scripts/build.js`
3199 verbose stack Exit status 1
3199 verbose stack     at EventEmitter.<anonymous> (E:\Java\nodejs\node_modules\npm\node_modules\npm-lifecycle\index.js:301:16)
3199 verbose stack     at EventEmitter.emit (events.js:203:13)
3199 verbose stack     at ChildProcess.<anonymous> (E:\Java\nodejs\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
3199 verbose stack     at ChildProcess.emit (events.js:203:13)
3199 verbose stack     at maybeClose (internal/child_process.js:1021:16)
3199 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)
3200 verbose pkgid node-sass@4.9.0
3201 verbose cwd D:\Desktop\家庭云\wbw-mall\mall-admin-web
3202 verbose Windows_NT 6.1.7601
3203 verbose argv "E:\\Java\\nodejs\\node.exe" "E:\\Java\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "--scripts-prepend-node-path=auto"
3204 verbose node v12.6.0
3205 verbose npm  v6.9.0
3206 error code ELIFECYCLE
3207 error errno 1
3208 error node-sass@4.9.0 postinstall: `node scripts/build.js`
3208 error Exit status 1
3209 error Failed at the node-sass@4.9.0 postinstall script.
3209 error This is probably not a problem with npm. There is likely additional logging output above.
3210 verbose exit [ 1, true ]