Permit use of .nvmrc file to define Node version

[adametry]

Agents won't run unless a Node version is defined by the Node.js NVM Installer build step. This would allow builds to vary the Node version with the source. This feature is described under NVM Usage.

[jonnyzzz]

How do you plan to use the file? Do you have it in the version control? Or it is a static file that is available on all build agents?

[adametry]

I have an .nvmrc in version control to set up the developer environment. It would be great to have builds adopt it as well. By using .nvmrc, I can migrate my source to node 0.11 (for example) without adjusting the build; I could even run old and new changesets without having figure out what parameters a build step required at the time.

I did try to work around the requirement by defining an empty parameter as a version (i.e., nvm install %empty%), but I had no luck there either.

[jonnyzzz]

I got your point. Thank you. You may try to report a parameter value from the build from a previous build runner

See http://confluence.jetbrains.com/display/TCD8/Build+Script+Interaction+with+TeamCity#BuildScriptInteractionwithTeamCity-AddingorChangingaBuildParameter for more details. Please note, you need to have a parameter declaration in the build configuration to make it work

[wrumsby]

An update here, I got the above working by executing a Node.js runner step before calling nvm with the following source code:

var fs = require('fs');
var version = '0.10';
var data;

try {
    data = fs.readFileSync('.nvmrc', 'utf8');
    version = data.replace(/(^[\s]+|[\s]+$)/g, '');;
} catch (e) {
    console.warn(e);
}

console.log("##teamcity[setParameter name='nvm.node.version' value='" + version + "']");

I then set Node.js version in the Node.js NVM Installer step to %nvm.node.version%

Would be nice if this was built into the NVM Installer, but still, this works.

[ediblecode]

Thanks @wrumsby that was useful. I did something similar in bash in a step before the NVM build step, if this helps anyone:

read -r nvmNodeVersion < .nvmrc
echo "Project Node version from .nvmrc is $nvmNodeVersion"
echo "##teamcity[setParameter name='nvm.node.version' value='$nvmNodeVersion']";

[zackmoorelba]

@ediblecode the bash script worked but it would sure be nice if the plugin had this built in