Be able to use a specific version of a module #10

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1. victorb

   added

   enhancement

   help wanted

   on Mar 21, 2016
2. victorb commented on Mar 21, 2016

   

   victorb

   on Mar 21, 2016

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   This is a good feature suggestion and something I would love to add. Also, being able to run two different versions of the same package sounds like a good feature as well, as long as the code written to support this can be simple.

   If anyone want to try to implement it (my time is limited right now), https://github.com/VictorBjelkholm/trymodule/blob/master/index.js#L30 would be the part where version is necessary to add (npmi docs here: https://github.com/maxleiko/npmi#optionsversion ). The multiple version packages thing I see as an extra addition that would simply resolve lodash@0.1.0 to be lodash in global context by default, but if the user provides lodash@0.1.0 and lodash@0.2.0 to be lodash_v0_1_0 and lodash_v0_2_0 in the global context (which is kind of ugly, if someone has a better idea of variable naming, please step forward :) )
3. jlebras commented on Mar 23, 2016

   

   jlebras

   on Mar 23, 2016

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   What if the user could set an alias for a module ?
   Like trymodule "lodash@0.1.0 as l1" "lodash@0.2.0 as l2".
   Or shorter like trymodule lodash@0.1.0=l1 lodash@0.2.0=l2
   But it's only a suggestion maybe too much work involved here ;).
4. victorb commented on Apr 1, 2016

   

   victorb

   on Apr 1, 2016

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   @jlebras I've opened a issue for that here: #17
5. shockey commented on Jun 7, 2016

   

   shockey

   on Jun 7, 2016

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   Once #19 is merged this should be pretty straightforward 😃
6. victorb commented on Jun 11, 2016

   

   victorb

   on Jun 11, 2016

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   I'm thinking how we can actually implement this. I did some quick hacking today, trying to just setting the version when calling npmi but it's not enough since npm has no feature for handling multiple versions of the same package.

         var version = 'latest'
         if (moduleName.indexOf('@')) {
           version = moduleName.split('@')[1]
           moduleName = moduleName.split('@')[0]
         }
         npmi({name: moduleName, path: install_path, version}, (err, result) => {

   So even with the change above, I'm not sure how to do this... If anyone have any ideas, please speak up! :)
7. shockey commented on Jun 11, 2016

   

   shockey

   on Jun 11, 2016

   Last edited by shockey

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   Say you want to load lodash@1.0.0 and lodash@2.0.0.

   We'll say the command looks like trymodule lodash@1.0.0=lodash1 lodash@2.0.0=lodash2

   Something that flows sequentially like this could work.

   1. npmi lodash@1.0.0
   2. require('lodash') and assign the result to the REPL scope as lodash1
   3. npmi lodash@2.0.0
   4. require('lodash') and assign the result to the REPL scope as lodash2

   In doing this, we must be careful to work around require's module caching.

   👍React with 👍1Reacted by Can Kutlu Kınay
8. shockey

   self-assigned this

   on Aug 22, 2016