yo polymer:seed error. "AssertionError: Trying to copy from a source that does not exist" #240

RossRothenstine · 2015-10-20T23:24:49Z

I'm getting a stacktrace when I attempt to use the polymer:seed generator.

events.js:141
      throw er; // Unhandled 'error' event
      ^
AssertionError: Trying to copy from a source that does not exist: /Users/212422863/apps/node-v4.2.1-darwin-x64/lib/node_modules/generator-polymer/seed/templates/seed-element/.gitignore
    at EditionInterface.exports._copySingle (/Users/212422863/apps/node-v4.2.1-darwin-x64/lib/node_modules/generator-polymer/node_modules/yeoman-generator/node_modules/mem-fs-editor/actions/copy.js:45:3)
    at EditionInterface.exports.copy (/Users/212422863/apps/node-v4.2.1-darwin-x64/lib/node_modules/generator-polymer/node_modules/yeoman-generator/node_modules/mem-fs-editor/actions/copy.js:23:17)
    at module.exports.yeoman.generators.Base.extend.seed (/Users/212422863/apps/node-v4.2.1-darwin-x64/lib/node_modules/generator-polymer/seed/index.js:125:15)
    at /Users/212422863/apps/node-v4.2.1-darwin-x64/lib/node_modules/generator-polymer/node_modules/yeoman-generator/lib/base.js:429:16
    at processImmediate [as _immediateCallback] (timers.js:368:17)

Versions:

OS: Mac Yosemite
node: v4.2.1
npm: 2.14.7
yo: 1.4.8

Listing of the directory generator-polymer/seed/templates/seed-element/

drwxr-xr-x  10 212422863 Domain Users   340B Oct 20 16:13 .
drwxr-xr-x   3 212422863  Domain Users   102B Oct 16 00:10 ..
-rw-r--r--   1 212422863  Domain Users    17B Oct 16 00:10 .npmignore
-rw-r--r--   1 212422863  Domain Users   1.6K Oct 16 00:10 README.md
-rw-r--r--   1 212422863  Domain Users   646B Oct 16 00:10 bower.json
drwxr-xr-x   3 212422863 Domain Users   102B Oct 16 00:10 demo
-rwxr-xr-x   1 212422863  Domain Users   1.1K Oct 16 00:10 hero.svg
-rw-r--r--   1 212422863  Domain Users   1.1K Oct 16 00:10 index.html
-rw-r--r--   1 212422863  Domain Users   4.0K Oct 16 00:10 seed-element.html
drwxr-xr-x   4 212422863Domain Users   136B Oct 20 16:13 test

The text was updated successfully, but these errors were encountered:

samccone · 2015-10-20T23:26:04Z

@RossRothenstine What version of the generator are you using, can you try installing the latest version of the generator

Thanks 🎇

RossRothenstine · 2015-10-20T23:48:19Z

Currently using 1.2.4, rolled back to 1.2.1 and it worked fine.

samccone · 2015-10-20T23:55:26Z

ok so to be clear 1.2.4 is giving you issues then? I am fairly confident we resolved the issue with the 1.2.3 release with 1.2.4... if not that is disconcerting

RossRothenstine · 2015-10-21T02:53:20Z

Yes. I attempted the latest, v1.2.3 and v1.2.2. Was only successful at running the seed generator on v1.2.1.

I'm not 100% confident in my setup, seeing how its a work issued Mac with some corporate biz installed on it. I would like to see if any one else can replicate it first.

samccone · 2015-10-21T02:54:03Z

@RossRothenstine mind running

ls /Users/212422863/apps/node-v4.2.1-darwin-x64/lib/node_modules/generator-polymer/seed/templates/seed-element/

RossRothenstine · 2015-10-21T03:08:11Z

Sure thing mate.

The below is after a fresh npm install of the latest version.

.           bower.json      seed-element.html
..          demo            test
.npmignore      hero.svg
README.md       index.html

Then, after an uninstall and reinstall of version v1.2.1. (using "npm install -g generator-polymer@v1.2.1")

.           bower.json      seed-element.html
..          demo            test
.npmignore      hero.svg
README.md       index.html

If it's worth anything, here is an ls of my directory after having ran v1.2.1.

total 48
drwxr-xr-x  11 212422863  Domain Users   374B Oct 20 20:10 .
drwxr-xr-x   6 212422863  Domain Users   204B Oct 20 19:51 ..
-rw-r--r--   1 212422863  Domain Users    17B Oct 20 20:10 .gitignore
-rw-r--r--   1 212422863  Domain Users    58B Oct 20 20:10 .yo-rc.json
-rw-r--r--   1 212422863  Domain Users   1.6K Oct 20 20:10 README.md
-rw-r--r--   1 212422863  Domain Users   633B Oct 20 20:10 bower.json
drwxr-xr-x  41 212422863  Domain Users   1.4K Oct 20 20:10 bower_components
drwxr-xr-x   3 212422863  Domain Users   102B Oct 20 20:08 demo
-rw-r--r--   1 212422863  Domain Users   1.1K Oct 20 20:10 index.html
-rw-r--r--   1 212422863  Domain Users   4.0K Oct 20 20:10 my-foo.html
drwxr-xr-x   4 212422863  Domain Users   136B Oct 20 20:08 test

samccone · 2015-10-21T03:13:38Z

wow, very confusing, well thanks for the info

RossRothenstine · 2015-10-21T03:19:42Z

FWIW I freshly installed npm, yo, bower, and generator-polymer@1.2.4 on my Windows 10 home machine and got similar output.

C:\Users\Ross\foo>yo polymer:seed my-ele
? ==========================================================================
? ==========================================================================
We're constantly looking for ways to make yo better!
May we anonymously report usage statistics to improve the tool over time?
More info: https://github.com/yeoman/insight & http://yeoman.io
========================================================================== Yes

     _-----_
    |       |    .--------------------------.
    |--(o)--|    | Out of the box I include |
   `---------´   |  Polymer's seed-element. |
    ( _´U`_ )    '--------------------------'
    /___A___\
     |  ~  |
   __'.___.'__
 ´   `  |° ´ Y `

? What is your GitHub username? 212422863
? Would you like to include web-component-tester? Yes

events.js:141
      throw er; // Unhandled 'error' event
      ^
AssertionError: Trying to copy from a source that does not exist: C:\Users\Ross\AppData\Roaming\npm\node_modules\generator-polymer\seed\templates\seed-element\.gitignore
    at EditionInterface.exports._copySingle (C:\Users\Ross\AppData\Roaming\npm\node_modules\generator-polymer\node_modules\yeoman-generator\node_modules\mem-fs-editor\actions\copy.js:45:3)
    at EditionInterface.exports.copy (C:\Users\Ross\AppData\Roaming\npm\node_modules\generator-polymer\node_modules\yeoman-generator\node_modules\mem-fs-editor\actions\copy.js:23:17)
    at module.exports.yeoman.generators.Base.extend.seed (C:\Users\Ross\AppData\Roaming\npm\node_modules\generator-polymer\seed\index.js:125:15)
    at C:\Users\Ross\AppData\Roaming\npm\node_modules\generator-polymer\node_modules\yeoman-generator\lib\base.js:429:16
    at processImmediate [as _immediateCallback] (timers.js:368:17)

samccone · 2015-10-21T03:24:14Z

(╯°□°）╯︵ ┻━┻

kk I will get to this when a have a spare 🕐

RossRothenstine · 2015-10-21T03:45:20Z

This diff may be of some use to you. I was able to get this working locally by changing the if statement to check the template path for the .npmignore.

diff --git a/seed/index.js b/seed/index.js
index af603e4..0dcec88 100644
--- a/seed/index.js
+++ b/seed/index.js
@@ -116,7 +116,7 @@ module.exports = yeoman.generators.Base.extend({

     // Handle bug where npm has renamed .gitignore to .npmignore
     // https://github.com/npm/npm/issues/3763
-    if (this.fs.exists('.npmignore')) {
+    if (this.fs.exists(this.templatePath('.npmignore'))) {
       this.fs.copy(
         this.templatePath('.npmignore'),
         this.destinationPath('.gitignore')

Regards

samccone · 2015-10-21T03:53:55Z

🙇 thx @RossRothenstine I am sure it will be something like that :) -- I am mostly curious what broke it initially

notthetup · 2015-10-21T07:12:44Z

I'm seeing this on OSX ElCap as well. I'm on node v4.2.1, yo 1.4.8 and generator-polymer 1.2.4.

~/node/lib/node_modules/generator-polymer/seed/templates/seed-element/.gitignore doesn't exist.

woisme · 2015-10-21T13:34:15Z

Having the same issue with the same error message. I am using a codeanywhere on a node virtual server.

npm/npm#1862 Partial fix for yeoman/generator-polymer#240

samccone · 2015-10-21T16:43:05Z

Ok so all fixed @RossRothenstine

Basically what was happening is when we were bundling up the seed elements, npm was trying to be smart and renaming (all) our .gitignore files to .npmignore so the file was no longer there,

This fix googlearchive/seed-element#69
Along with this commit fec4690

Will make it so this error will not hit you.

The reason why this was tricky to reproduce locally, was because the npm renaming behavior only happens on publish thus when deving locally it was mystifying!

Onto 1.2.5 🎇 --- Thanks for all of the reports everyone and the excellent debugging work @RossRothenstine 🅰️ ➕

RossRothenstine · 2015-10-21T22:07:05Z

I think this may need further discussion, as I'm still seeing the issue with v1.2.5.

Could it be that the seed/templates/seed-element submodule is at the wrong revision?

samccone · 2015-10-21T23:30:48Z

You are correct, I am a bit confused as to how I got this to work locally in the last pass 😿

Well I was not super crazy with the idea that adding a .npmignore would prevent this behavior even people on the team are confused by it :) npm/npm#7252 (comment)

ok, alas I think we need to copy .npmignore and then rename it to a .gitignore

notthetup · 2015-10-22T01:21:17Z

Maybe commit the file as npmignore and then rename them to .npmignore on copy?

robdodson · 2015-10-22T08:20:10Z

@samccone can we use the method outlined about of using fs.exists instead of fs.exists(this.templatePath) ?

robdodson · 2015-10-22T08:23:51Z

er sorry, I think I reversed my codes. It should check this.fs.exists(this.templatePath(.npmignore))

also, we may want to see if this happens in npm 4 vs 0.12.

wilbertverayin · 2015-10-23T03:05:52Z

I checked my npm version (2.14.2) and node version (v4.0.0)

events.js:141
      throw er; // Unhandled 'error' event
      ^
AssertionError: Trying to copy from a source that does not exist: C:\Users\wilbert\AppData\Roaming\npm\node_modules\generator-polymer\seed\templates\seed-element\.gitignore
    at EditionInterface.exports._copySingle (C:\Users\wilbert\AppData\Roaming\npm\node_modules\generator-polymer\node_modules\yeoman-generator\node_modules\mem-fs-editor\actions\copy.js:45:3)
    at EditionInterface.exports.copy (C:\Users\wilbert\AppData\Roaming\npm\node_modules\generator-polymer\node_modules\yeoman-generator\node_modules\mem-fs-editor\actions\copy.js:23:17)
    at module.exports.yeoman.generators.Base.extend.seed (C:\Users\wilbert\AppData\Roaming\npm\node_modules\generator-polymer\seed\index.js:125:15)
    at C:\Users\wilbert\AppData\Roaming\npm\node_modules\generator-polymer\node_modules\yeoman-generator\lib\base.js:429:16
    at processImmediate [as _immediateCallback] (timers.js:371:17)

wilbert@WILBERTPC /d/Projects/polymer/aj-autocomplete
$ npm --version
2.14.2

wilbert@WILBERTPC /d/Projects/polymer/aj-autocomplete
$ node --version
v4.0.0

samccone · 2015-10-23T03:21:40Z

yeah this is not an issue with node 4 vs node .12 it is simply an issue with the renaming of gitignore on publish and explicitly trying to copy it, since it is being renamed to npmignore

I think it all is related to
f9e2d0d#diff-2018087f584c4398b5c3a23fc0e5f9dbR60

I will work on a patch when I have a moment 🕐

Fixes #240 Regression introduced in f9e2d0d#diff-2018087f584c4398b5c3a23fc0e5f9dbR60

RossRothenstine · 2015-10-23T21:11:40Z

@samccone, thanks for the diligence and speed to fix this issue. +1 mate, I really appreciate it.

motss · 2015-10-24T19:30:04Z

Had the same issue on Ubuntu 14.04 in version 1.2.5. Rolled back to 1.2.1 and worked fine.

samccone self-assigned this Oct 21, 2015

samccone added the bug label Oct 21, 2015

samccone added a commit to samccone/seed-element that referenced this issue Oct 21, 2015

Add empty npmignore to "fix" npm renaming

86c3e2e

npm/npm#1862 Partial fix for yeoman/generator-polymer#240

samccone mentioned this issue Oct 21, 2015

Add empty npmignore to "fix" npm renaming googlearchive/seed-element#69

Merged

samccone closed this as completed Oct 21, 2015

samccone reopened this Oct 21, 2015

samccone added a commit that referenced this issue Oct 23, 2015

Fix incorrect npmignore sniffing

4d059e4

Fixes #240 Regression introduced in f9e2d0d#diff-2018087f584c4398b5c3a23fc0e5f9dbR60

samccone mentioned this issue Oct 23, 2015

Fix incorrect npmignore sniffing #242

Merged

robdodson closed this as completed in #242 Oct 25, 2015

ohle mentioned this issue Dec 27, 2015

Missing .gitignore erosb/generator-typescript-backbone-amd#4

Closed

giuseppeg mentioned this issue Apr 13, 2016

error running yo suit component-name suitcss/generator-suit#9

Closed

marlon-tucker mentioned this issue Mar 30, 2017

Template copy error mwootendev/generator-tslib-webpack#2

Closed

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yo polymer:seed error. "AssertionError: Trying to copy from a source that does not exist" #240

yo polymer:seed error. "AssertionError: Trying to copy from a source that does not exist" #240

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motss commented Oct 24, 2015

yo polymer:seed error. "AssertionError: Trying to copy from a source that does not exist" #240

yo polymer:seed error. "AssertionError: Trying to copy from a source that does not exist" #240

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