Ops is the OpenServerless cli tool.
It embeds Task and OpenWhisk wsk. Note that Task actually embeds a shell interpreter so most of the tasks are actully implemented as shell scripts embedded in taskfiles (YAML).
Most of its capabilites are implemented as a hiearchy of taskfiles, managed as described below. There is a preprocessing done on the command line allowing to find the correct taskfile, and parameters of each task are described using docpts
To be able to develop ops you need either to know posix shell scripting, taskfile definition and docpts.
The shell is modified to be able to test some commands in a special way to simplify writing the scripts in the taskfiles.
In particular, all the commonly used Unix utilites are delegated to an utility that embeds all of then called coreutils. So in a task all the commands listed as coreutils like rm, ls are actually translated in an invocation of coreutils rm, coreutils ls and so all. All the commands delegated to coreutils can be seen with ops -help. We are using uutils a rust portable rewrite of core unix coreutils.
Furthrmore some commands are implemented in ops itself. For example it embeds an awk intepreter (actually gowak and a JQ intepreter (actually gojq). The shell is modified to be able to use those tooks awk and jq directly.
Some commands are actually external so there is support for automatically downloading prequisite binaries.
All the CLI commands are a hierarchy of taskfiles downloaded automatically from https://github.com/apache/openserverless-task
It then parse the command line to locate the correct taskfile and execute it.
Before executing each command, there is a prerequisite management system that is executed before actually running the commands, so the correct version of the utils are downloaded
TODO describe the command line
TODO describe prereq.yaml