npm check and update package if needed

Question

We need to integrate Karma test runner into TeamCity and for that I d like to give sys-engineers small script  powershell or whatever  that would    pick up desired version number from some config file  I guess I can put it as a comment right in the karma conf js  check if the defined version of karma runner installed in npm s global repo if it s not  or the installed version is older than desired  pick up and install right version run it  karma start   Scripts-Tests karma conf js --reporters teamcity --single-run   So my real question is   how can one check in a script  if desired version of package installed    Should you do the check  or it s safe to just call npm -g install everytime   I don t want to always check and install the latest available version  because other config values may become incompatible

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npm outdated will identify packages that should be updated  and npm update  lt package name gt  can be used to update each package  But prior to npm 5 0 0  npm update  lt package name gt  will not update the versions in your package json which is an issue   The best workflow is to    Identify out of date packages Update the versions in your package json Run npm update to install the latest versions of each package   Check out npm-check-updates to help with this workflow    Install npm-check-updates Run npm-check-updates to list what packages are out of date  basically the same thing as running npm outdated  Run npm-check-updates -u to update all the versions in your package json  this is the magic sauce  Run npm update as usual to install the new versions of your packages based on the updated package json

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As of npm 5 0 0  you can simply do   npm update  lt package name gt    This will automatically update the package json file  We don t have to update the latest version manually and then use npm update  lt package name gt   You can still get the old behavior using   npm update --no-save    Reference

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There is also a  quot fresh quot  module called npm-check   npm-check Check for outdated  incorrect  and unused dependencies    It also provides a convenient interactive way to update the dependencies with npm-check -u

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To update a single local package    First find out your outdated packages   npm outdated Then update the package or packages that you want manually as   npm update --save package name    This way it is not necessary to update your local package json    file   Note that this will update your package to the latest version    If you write some version in your package json file and do   npm update package name  In this case you will get just the next stable version  wanted  regarding the version that you wrote in your package json file    And with npm list  package name  you can find out the current version of your local packages

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One easy step    npm i -g npm-check-updates  amp  amp  ncu -u  amp  amp  npm i That is all  All of the package versions in package json will be the latest major versions  Edit  What is happening here    Installing a package that checks updates for you   Use this package to update all package versions in your package json  -u is short for --updateAll    Install all of the new versions of the packages

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To check if any module in a project is  old    npm outdated    outdated  will check every module defined in package json and see if there is a newer version in the NPM registry   For example  say xml2js 0 2 6  located in node modules in the current project  is outdated because a newer version exists  0 2 7   You would see   xml2js 0 2 7 node modules xml2js current 0 2 6   To update all dependencies  if you are confident this is desirable   npm update   Or  to update a single dependency such as xml2js   npm update xml2js

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No additional packages  to just check outdated and update those which are  this command will do   npm install   npm outdated   cut -d    -f 1   sed  1d    xargs -I     echo    latest    xargs echo

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When installing npm packages  both globally or locally  you can define a specific version by using the  version syntax to define a version to be installed   In other words  doing  npm install -g karma 0 9 2  will ensure that only 0 9 2 is installed and won t reinstall if it already exists   As a word of a advice  I would suggest avoiding global npm installs wherever you can  Many people don t realize that if a dependency defines a bin file  it gets installed to   node modules  bin   Often  its very easy to use that local version of an installed module that is defined in your package json  In fact  npm scripts will add the   node modules  bin onto your path   As an example  here is a package json that  when I run npm install  amp  amp  npm test will install the version of karma defined in my package json  and use that version of karma  installed at node modules  bin karma  when running the test script       name    myApp     main    app js     scripts         test    karma test           dependencies            devDependencies         karma    0 9 2         This gives you the benefit of your package json defining the version of karma to use and not having to keep that config globally on your CI box

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NPM commands to update or fix  vulnerabilities in some dependency manifest files   Use below command to check outdated or vulnerabilities in your node modules      npm audit  If any vulnerabilities  found  use below command to fix all issues      npm audit fix  If it doesn t work for you then try      npm audit fix -f  this command will almost fix all vulnerabilities  Some dependencies or devDependencies are locked in package-lock json file  so we use -f flag to force update them   If you don t want to use force audit fix then you can manually fix your dependencies versions by changing them in package-lock json and package json file  Then run    npm update  amp  amp  npm upgrade

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Check outdated packages  npm outdated   Check and pick packages to update  npx npm-check -u   npm oudated img  npx npm-check -u img

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To really update just one package install NCU and then run it just for that package  This will bump to the real latest   npm install -g npm-check-updates  ncu -f your-intended-package-name -u

[node.js] npm check and update package if needed

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