This reminds me of an example I ran into yesterday. I haven't used webpack yet but I saw a question on SO of someone wanting to use some package called glslify. I thought I'd take a look and maybe learn webpage in the process.
From the description all glslify does is look for files with the extensions .glsl, .frag, and .vert and lets you get their contents with `content = require(filename)`.
Sounds like it would be at most 10-30 lines of code. Nope
npm install --save glslify-loader
webpack-glsl-test@1.0.0 /Users/gregg/temp/webpack-glsl-test
└─┬ glslify-loader@1.0.2
└─┬ glslify@2.3.1
├─┬ bl@0.9.5
│ └─┬ readable-stream@1.0.33
│ ├── core-util-is@1.0.2
│ ├── isarray@0.0.1
│ └── string_decoder@0.10.31
├─┬ glsl-resolve@0.0.1
│ ├── resolve@0.6.3
│ └── xtend@2.2.0
├─┬ glslify-bundle@2.0.4
│ ├─┬ glsl-inject-defines@1.0.3
│ │ └── glsl-token-inject-block@1.0.0
│ ├── glsl-token-defines@1.0.0
│ ├── glsl-token-depth@1.1.2
│ ├─┬ glsl-token-descope@1.0.2
│ │ ├── glsl-token-assignments@2.0.1
│ │ └── glsl-token-properties@1.0.1
│ ├── glsl-token-scope@1.1.2
│ ├── glsl-token-string@1.0.1
│ └── glsl-tokenizer@2.0.2
├─┬ glslify-deps@1.2.5
│ ├── events@1.1.0
│ ├─┬ findup@0.1.5
│ │ ├── colors@0.6.2
│ │ └── commander@2.1.0
│ ├── graceful-fs@4.1.3
│ ├── inherits@2.0.1
│ └─┬ map-limit@0.0.1
│ └─┬ once@1.3.3
│ └── wrappy@1.0.1
├── minimist@1.2.0
├── resolve@1.1.7
├─┬ static-module@1.3.0
│ ├─┬ concat-stream@1.4.10
│ │ ├── readable-stream@1.1.13
│ │ └── typedarray@0.0.6
│ ├─┬ duplexer2@0.0.2
│ │ └── readable-stream@1.1.13
│ ├─┬ escodegen@1.3.3
│ │ ├── esprima@1.1.1
│ │ ├── estraverse@1.5.1
│ │ ├── esutils@1.0.0
│ │ └─┬ source-map@0.1.43
│ │ └── amdefine@1.0.0
│ ├─┬ falafel@1.2.0
│ │ ├── acorn@1.2.2
│ │ ├── foreach@2.0.5
│ │ └── object-keys@1.0.9
│ ├─┬ has@1.0.1
│ │ └── function-bind@1.0.2
│ ├── object-inspect@0.4.0
│ ├─┬ quote-stream@0.0.0
│ │ ├── minimist@0.0.8
│ │ └─┬ through2@0.4.2
│ │ └─┬ xtend@2.1.2
│ │ └── object-keys@0.4.0
│ ├── shallow-copy@0.0.1
│ ├─┬ static-eval@0.2.4
│ │ └─┬ escodegen@0.0.28
│ │ ├── esprima@1.0.4
│ │ └── estraverse@1.3.2
│ └─┬ through2@0.4.2
│ └─┬ xtend@2.1.2
│ └── object-keys@0.4.0
├── through2@0.6.5
└── xtend@4.0.1
> 4 meg of source files
---
update: I think maybe I misunderstood the description. glslify actually parses GLSL and re-writes it in various ways so maybe this is a bad example.
I've seen other though. Like 40k+ lines of deps for an ANSI color library or 200k+ lines deps and native node plugins for launching a browser from node.