Example of command execution framework with custom defined "micro language". Basic idea here is to define tasks in the context and build a pipeline of execution for their tasks. For that we define rules to build simple AST with a help of Paraboled.
For the simplification I took the idea that every operation can represent different kind of action, in this example we have just 3 main operations:
- Task - define a binding to some operation in format
task <name> <operation>where an operation is a predefined function that manipulates with strings. Currently are supported 4 operations:noop,delay,reverse,echo. The First task is added to an execution pipeline. - Link - define a pipe from one task to another. It modifies task in pipeline execution and do a combination of functions (operations bound to defined tasks).
- Process - executes pipeline and returns a result a list of strings.
Sample input output you can see here:
task t1 echo
Defined task: t1
Please define another task or type process ...
process abc joe
Cleaned pipeline
Commands execution result:
abcabc joejoe
Let's take a look at more complicated case:
task t1 echo
Defined task: t1
Please define another task or type process ...
task t2 reverse
Defined task: t2
Please define another task or type process ...
task t3 echo
Defined task: t3
Please define another task or type process ...
link t1 t2
Lined tasks: t1 => t2
Please define another task or type process ...
link t2 t3
Lined tasks: t2 => t3
Please define another task or type process ...
process abc bimbo grasp
Cleaned pipeline
Commands execution result:
cbacba obmibobmib psargpsarg