Middleware doesn't load relative to where you run the CLI from

[1j01]

Issue description

If I try to use the --middleware option with a relative path, it fails, and it doesn't give much information.
(It's hard to tell where it's searching from; it's buried in the middle of a stack trace.)

Error: Cannot find module 'extensionless-urls.js'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at /home/ubuntu/workspace/node_modules/live-server/index.js:174:10
    at Array.map (native)
    at Object.LiveServer.start (/home/ubuntu/workspace/node_modules/live-server/index.js:168:13)
    at Object.<anonymous> (/home/ubuntu/workspace/node_modules/live-server/live-server.js:166:12)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)

I had to add ../../ to the --middleware option to get it to work, which is ugly. It seems like it should really look for files relative to where you launch the CLI from, i.e. the current working directory of the process.

Software details

• Command line used for launching live-server: live-server --middleware=extensionless-urls.js
• OS: Linux
• Browser (if browser related):
• Node.js version: v9.5.0
• live-server version: 1.2.0

[rasmniel]

I've also been struggling with this issue.

The problem is especially prominent when running live-server through npx, in which case it is basically impossible to use non-builtin middleware without supplying an absolute path to the middleware file (which is undesirable as it is unlikely to work across different machines)

I'm setting up a small dev environment for our frontenders, and this is not possible without explicitly installing live-server in the project in order to supply the necessary middleware.

[1j01]

@rasmniel If you're including middleware for live-server in the project, what's wrong with installing live-server in the project (as a dev dependency)?

[rasmniel]

Since my middleware is generic connect middleware, it could be used with any connect-compatible setup, e.g. express. This is why I don't want to explicitly add live-server.

Adding the dependency would be a workaround rather than a fix, which seems kinda half-hearted to me. There's so much "out-of-the-box" utility in this little package. Why not make it go a bit further with more reliable path resolution?

[rasmniel]

I've made a pull request to remedy this problem #330