building with recursive language dependencies should show a pretty error

[brandondiamond]

I've been looking into improving the dart language definition; to get started, I built highlight.js locally for dart and received the following error (see below).

After some investigation, it seems that this is caused by the dependency on markdown which, in turn, depends on xml. This appears to be the only dependency chain in the language definition files. I haven't investigated in depth, but it seems that the build tools are currently unable to handle recursive dependencies.

  1 [I] username@username highlight.js> node tools/build.js dart
  2 Starting build.
  3 Copying documentation.
  4 Writing documentation.
  5 Generating demo.
  6 Building highlight.js pack file.
  7 /home/username/githubext/highlight.js/tools/tasks.js:35
  8     if(!object.processed) {
  9                ^
 10 
 11 TypeError: Cannot read property 'processed' of undefined
 12     at pushInBlob (/home/username/githubext/highlight.js/tools/tasks.js:35:16)
 13     at /home/username/githubext/highlight.js/tools/tasks.js:47:9
 14     at arrayEach (/home/username/githubext/highlight.js/node_modules/lodash/lodash.js:516:11)
 15     at Function.forEach (/home/username/githubext/highlight.js/node_modules/lodash/lodash.js:9342:14)
 16     at /home/username/githubext/highlight.js/tools/tasks.js:45:9
 17     at /home/username/githubext/highlight.js/node_modules/lodash/lodash.js:4905:15
 18     at baseForOwn (/home/username/githubext/highlight.js/node_modules/lodash/lodash.js:2990:24)
 19     at /home/username/githubext/highlight.js/node_modules/lodash/lodash.js:4874:18
 20     at Function.forEach (/home/username/githubext/highlight.js/node_modules/lodash/lodash.js:9342:14)
 21     at Queue.tasks.reorderDeps (/home/username/githubext/highlight.js/tools/tasks.js:41:5)
 22     at Queue._dispatch (/home/username/githubext/highlight.js/node_modules/gear/lib/queue.js:101:18)
 23     at Array.<anonymous> (/home/username/githubext/highlight.js/node_modules/gear/lib/tasks/tasks.js:34:18)
 24     at listener (/home/username/githubext/highlight.js/node_modules/async/lib/async.js:493:46)
 25     at /home/username/githubext/highlight.js/node_modules/async/lib/async.js:444:17
 26     at Array.forEach (<anonymous>)
 27     at _each (/home/username/githubext/highlight.js/node_modules/async/lib/async.js:46:24)
 28 

[egor-rogov]

I haven't investigated either, but seems that node tools/build.js dart markdown works fine.

[brandondiamond]

Ah, good point. I was going to speculate that this is actually working as intended, but it seems that other languages with dependencies don't require their dependencies to be specified to the tool -- so this does look to be a breakage.

[joshgoebel]

but it seems that other languages with dependencies don't require their dependencies to be specified to the tool -- so this does look to be a breakage.

Can you provide examples of this "non-requirement"? If you don't build the dependencies then the languages are going to break IME. This is true of at least SQF/Cpp for sure because I've worked with it myself (although there is a PR to remove the dependency).

Or I think you're talking specifically about the BUILD rather than usage of the library...

[joshgoebel]

This should probably be considered when/if we get around to reworking the build system?