When calling a task with vars (e.g., `task: name` with `vars:`),
those vars were not being applied in scoped mode. This fix adds
call.Vars to the variable resolution chain.
Variable priority (lowest to highest):
1. Root Taskfile vars
2. Include Taskfile vars
3. Include passthrough vars
4. Task vars
5. Call vars (NEW)
6. CLI vars
In scoped mode, CLI vars (e.g., `task foo VAR=value`) now correctly
override task-level vars. This is achieved by:
1. Adding a `CLIVars` field to the Compiler struct
2. Storing CLI globals in this field after parsing
3. Applying CLI vars last in scoped mode to ensure they override everything
The order of variable resolution in scoped mode is now:
1. OS env → {{.env.XXX}}
2. Root taskfile env → {{.env.XXX}}
3. Root taskfile vars → {{.VAR}}
4. Include taskfile env/vars (if applicable)
5. IncludeVars (vars passed via includes: section)
6. Task-level vars
7. CLI vars (highest priority)
Legacy mode behavior is unchanged.
Rename the experiment from SCOPED_INCLUDES to SCOPED_TASKFILES to better
reflect its expanded scope. This experiment now provides:
1. Variable scoping (existing): includes see only their own vars + parent vars
2. Environment namespace (new): env vars accessible via {{.env.XXX}}
With TASK_X_SCOPED_TASKFILES=1:
- {{.VAR}} accesses vars only (scoped per include)
- {{.env.VAR}} accesses env (OS + Taskfile env:, inherited)
- {{.TASK}} and other special vars remain at root level
This is a breaking change for the experimental feature:
- {{.PATH}} no longer works, use {{.env.PATH}} instead
- Env vars are no longer at root level in templates
