Using bazel to build the shell scripts [Blocked on Discussion]

[FareesHussain]

Is your feature request related to a problem? Please describe. When setting up the project different tools are used

• bash to run the shell scripts
• Bazel to build the app

there might be some new features that require some new tools too inspired from oppia-web that when setting up the project the pre-commit and pre-push hooks are added

This will reduce a lot of FAQs only requirement for the project would be installing bazel

Describe the solution you'd like In Oppia-web almost every script is run using the same tool (i.e python) it will setup all the requirements in a single command Wondering to use the same for Oppia-Android too taking the advantage of Bazel's most important feature -- multi language build to setup the whole project in one build including

• Oppia-bazel-tools
• git hooks
• shell scripts
• custom lint commands

Additional context We will be using Starlark for the logic to check if the project is set up as expected before building the app

• Checks whether the git hook are Available
• Checks the ~/.bazelrc is as expected
• Verifies Oppia-android-tools and their versions
• verifies Oppia-bazel-tools
• checks ANDROID_HOME path navigates to Sdk
• checks if the python path is available

All the above checks would have an exception handling with a suggestion that would avoid the most of the FAQs while building the project, this will save huge time for both contributor and the maintainer

[FareesHussain]

cc/ @BenHenning @fsharpasharp

[FareesHussain]

This feature can be used now but the purpose for this will be only after the complete migration of gradle to bazel