With a recent commit, template evaluation for variables in tasks got
broken. This reindroudces temmplate evaluation in taks, and resolves
a series of issues that where previouisly present on master, such as:
- Taskvars did not get evaluated as templates.
- Taskvars would, in contrast to the documentation, _override_ task
variables for the taks called directly via `Executor.Run(args
...string)`. This caused different behaviour in the "default" task
v.s. other tasks.
This commit ensures:
- Priority order for variables is now according to the documentation,
also for the "default" task.
- Variables gets resolved in a particular order to ensure logical
access to varaibles on template compile time, and that template
compilation finds place _before_ resolution of dynamic variables.
This change also allows the following to work:
task:
vars:
A: "52"
B: "{{.A}}"
However, the following will always replace C with the uncompiled
`{{.A}}`:
task:
vars:
A: "52"
C: "{{.B}}"
B: "{{.A}}"
Several tests have also been added to prevent this feature from breaking
again. This should hopefully finally resolve issue #40.
this is the first big step of #45
now t.ReplaceVariable will return a copy of the task, but with variables
replaced
now we don't need to replace variables everywhere in the code, and will
make other refactorings easier
