feat(veans): add shared command runtime and git branch helper

veans/internal/commands/git.go

@@ -0,0 +1,17 @@
+package commands
+
+import (
+	"os/exec"
+	"strings"
+)
+
+// runGit runs `git <args...>` in the current working directory and returns
+// trimmed stdout. Errors are returned to the caller so they can decide
+// whether silence or escalation is appropriate.
+func runGit(args ...string) (string, error) {
+	out, err := exec.Command("git", args...).Output()
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimRight(string(out), "\r\n"), nil
+}

veans/internal/commands/runtime.go

@@ -0,0 +1,114 @@
+package commands
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"code.vikunja.io/veans/internal/client"
+	"code.vikunja.io/veans/internal/config"
+	"code.vikunja.io/veans/internal/credentials"
+	"code.vikunja.io/veans/internal/output"
+)
+
+// runtime bundles the artifacts every non-init command needs: parsed config,
+// credential store, and an authed HTTP client. Loaded lazily by loadRuntime
+// at command start.
+type runtime struct {
+	cfg    *config.Config
+	store  credentials.Store
+	client *client.Client
+}
+
+func loadRuntime() (*runtime, error) {
+	path, err := config.Find("")
+	if err != nil {
+		if errors.Is(err, config.ErrNotFound) {
+			return nil, output.Wrap(output.CodeNotConfigured, err,
+				"no .veans.yml found — run `veans init` in your repo first")
+		}
+		return nil, err
+	}
+	cfg, err := config.Load(path)
+	if err != nil {
+		return nil, err
+	}
+	store := credentials.Default()
+	tok, err := store.Get(cfg.Server, cfg.Bot.Username)
+	if err != nil {
+		return nil, output.Wrap(output.CodeAuth, err,
+			"no token for %s on %s — run `veans login` to mint a fresh one",
+			cfg.Bot.Username, cfg.Server)
+	}
+	return &runtime{
+		cfg:    cfg,
+		store:  store,
+		client: client.New(cfg.Server, tok),
+	}, nil
+}
+
+// resolveTaskID accepts PROJ-NN, #NN, or a bare integer and returns the
+// numeric task ID. The project identifier from .veans.yml is used to verify
+// the prefix matches; mismatches error out so an agent can't accidentally
+// poke a task in the wrong project.
+func (r *runtime) resolveTaskID(ctx context.Context, raw string) (int64, error) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return 0, output.New(output.CodeValidation, "empty task ID")
+	}
+
+	// #NN form
+	if strings.HasPrefix(raw, "#") {
+		n, err := strconv.ParseInt(raw[1:], 10, 64)
+		if err != nil {
+			return 0, output.Wrap(output.CodeValidation, err, "invalid task ID %q", raw)
+		}
+		return r.lookupByIndex(ctx, n)
+	}
+
+	// Bare integer — treat as task index in the configured project.
+	if n, err := strconv.ParseInt(raw, 10, 64); err == nil {
+		return r.lookupByIndex(ctx, n)
+	}
+
+	// PROJ-NN form
+	idx := strings.LastIndex(raw, "-")
+	if idx > 0 && idx < len(raw)-1 {
+		prefix := raw[:idx]
+		num := raw[idx+1:]
+		if r.cfg.ProjectIdentifier != "" && !strings.EqualFold(prefix, r.cfg.ProjectIdentifier) {
+			return 0, output.New(output.CodeValidation,
+				"task %q has identifier %q, but this repo's .veans.yml uses %q",
+				raw, prefix, r.cfg.ProjectIdentifier)
+		}
+		n, err := strconv.ParseInt(num, 10, 64)
+		if err != nil {
+			return 0, output.Wrap(output.CodeValidation, err, "invalid task ID %q", raw)
+		}
+		return r.lookupByIndex(ctx, n)
+	}
+
+	return 0, output.New(output.CodeValidation, "invalid task ID %q (expected PROJ-NN, #NN, or NN)", raw)
+}
+
+// lookupByIndex resolves a 1-based per-project task index (the NN in
+// PROJ-NN / #NN) to a numeric task ID by listing the project's tasks and
+// matching on Index. The cost is one paged GET; we tolerate it because
+// resolving by index without a dedicated endpoint is the only stable path.
+func (r *runtime) lookupByIndex(ctx context.Context, index int64) (int64, error) {
+	tasks, err := r.client.ListProjectTasks(ctx, r.cfg.ProjectID, &client.TaskListOptions{
+		Filter: fmt.Sprintf("index = %d", index),
+	})
+	if err != nil {
+		return 0, err
+	}
+	for _, t := range tasks {
+		if t.Index == index {
+			return t.ID, nil
+		}
+	}
+	return 0, output.New(output.CodeNotFound, "task %s not found in project %d",
+		r.cfg.FormatTaskID(index), r.cfg.ProjectID)
+}