Tya v0.50 Release Notes

Status: shipped. tya version reports 0.50.0 and ROADMAP.md carries the matching Released entry.

TL;DR

v0.49 introduced tya new / tya task / tya lint in minimal form. v0.50 extends each of them so they cover a real project workflow.

• tya lint — three new rules (TYAL0003 if true/false, TYAL0004 deep nesting, TYAL0005 long functions) plus a --fix mode that removes unused-local lines in place.
• tya new — --here, --template app|lib, --force, --no-git, and automatic git init on by default. app keeps the v0.49 script template; lib scaffolds a class file plus a corresponding test.
• tya task — TOML table form [tasks.foo] cmds = [...]; parallel = true runs every command concurrently, waits for all to finish (case B), prefixes each output line with [<index> <truncated cmd>] , and exits with the first non-zero child exit code.

The language surface is unchanged from v0.49.

What’s new

tya lint

$ tya lint src
src/foo.tya:5:0: TYAL0003 redundant `if true`
src/foo.tya:12:0: TYAL0004 deeply nested block (depth >= 5)
src/foo.tya:42:3: TYAL0005 function body has 78 statements (> 50)
src/foo.tya:51:1: TYAL0001 unused local "tmp"

$ tya lint --fix src
# `tmp` line removed in place; TYAL0003/0004/0005 still printed
src/foo.tya:5:0: TYAL0003 redundant `if true`
src/foo.tya:12:0: TYAL0004 deeply nested block (depth >= 5)
src/foo.tya:42:3: TYAL0005 function body has 78 statements (> 50)

--fix only rewrites unused-local lines in v0.50. AST-rewriting autofix for if true/if false is queued for v0.51+.

tya new

$ tya new myapp                        # app template, git init
$ tya new --template lib --here mylib  # lib template, cwd
$ tya new --no-git --force scratch     # skip git, overwrite if exists

The app template gains tests/main_test.tya (a 1-test boilerplate that uses unittest) and README.md. The lib template scaffolds a class file (src/<PascalName>.tya) plus a matching test file. Both templates include sample [tasks] entries: run and test.

tya task

[tasks.watch]
cmds     = ["tya format --watch", "tya lsp"]
parallel = true

$ tya task watch
[1 tya format --…] Watching src/...
[2 tya lsp]       LSP listening on stdin

Failure mode (case B — all wait, first non-zero exit code wins):

$ tya task ci-parallel
[1 tya format] ok
[3 tya test] FAIL: ...
[2 tya check] ok
[TYA-E0903] task "ci-parallel" parallel: #3 ("tya test") exit 1
$ echo $?
1

Compatibility

• Language: unchanged from v0.49.
• Manifest schema: backwards compatible. The new [tasks.<name>] table form sits next to the existing string and array forms.
• CLI: every existing subcommand retains its v0.49 behavior unchanged. New flags are additive.

Migration

Nothing required. Optional:

1. Add a [tasks.<name>] parallel = true task to your tya.toml for concurrent workflows (e.g. dev servers, watch processes).
2. Run tya lint --fix to autoclean unused locals across src/.
3. New projects: tya new --template lib <name> gives a typed class entrypoint instead of a bare script.

Implementation notes

• The Task TOML schema is now a tagged union: Kind ∈ {"string", "array", "parallel"}. The Go reference implementation models this in internal/pkg/manifest.go::Task.
• internal/checker.CollectLintFindings is a new public API on top of the existing AST walker. It returns a flat []LintFinding covering TYAL0003/0004/0005.
• cmd/tya/lint.go::fixUnusedLines does line-based source rewriting, not AST rewriting. This keeps comments / formatting intact for v0.50; richer AST-rewriting autofix lands later.
• cmd/tya/task.go::runParallel uses one goroutine per child plus two more goroutines per child for stdout/stderr line pumping with bufio.Scanner. Pipes close on cmd.Wait() after scanners drain.

Looking ahead (v0.51+ candidates)

From ROADMAP.md § Future Work § Toolchain:

• tya lint: TYAL0002 dead code after return/raise, per-line opt-out, --format=json, threshold configuration via tya.toml [lint], AST-rewriting autofix for TYAL0003.
• tya new: extra templates (web, cli), README variants.
• tya task: dependency graph (depends-on), --watch driver, per-task environment variables.
• tya doc and tya lsp MVPs (separate Epics).

Self-host work (ROADMAP.md § Scheduled M8/M9/M10) remains deferred until the v1.0.0 prep window.