Make API Codegen Work on Linux

[ckadner]

Code Changes:

• Use a platform-specific gsed alias in api/codegen.sh script
• Delete duplicated api/add_license_headers.sh script
• Move existing helper scripts from /hack to /tools
• Remove .travis.yml and git_push.sh from API code generation

Resolves #254

Additional Information:

Use Docker for testing using Linux/Ubuntu for developers using macOS:

• Create a Dockerfile like this:

FROM ubuntu:latest

RUN apt-get -y update
RUN apt-get -y install git
RUN apt-get -y install make
RUN apt-get -y install curl
RUN apt-get -y install wget

ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get -y install default-jre-headless

RUN apt-get clean && rm -rf /var/lib/apt/lists/*

• Build the image and run the container:

docker build -t ubuntu-make-curl-git-java .

docker run -it ubuntu-make-curl-git-java /bin/bash

• Inside the container, run the api/codegen.sh script:

git clone https://github.com/ckadner/mlx.git
cd mlx
git checkout fix_codegen_on_linux
./api/codegen.sh
git status

Note:: the api/generate_code.sh script will only work after this PR got merged, since it relies on comparing current codegen results with those of a previous (latest) commit from main (which will not yet have the fix).

[mlx-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ckadner

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [ckadner]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ckadner]

@BluThaitanium -- this PR uses the same fix you provided last week in PR #250 -- Please review when you get a chance. Thanks!

[JAulet]

/lgtm

[ckadner]

Thanks @JAulet