Add ResolveDeps for end-to-end dependency resolution

go.mod

@@ -4,7 +4,10 @@ go 1.25.7
 
 require github.com/git-pkgs/purl v0.1.8
 
+require gopkg.in/yaml.v3 v3.0.1 // indirect
+
 require (
+	github.com/git-pkgs/managers v0.8.2-0.20260413100248-effbf8f1d790
 	github.com/git-pkgs/packageurl-go v0.2.1 // indirect
 	github.com/git-pkgs/vers v0.2.2 // indirect
 )

go.sum

@@ -1,6 +1,12 @@
+github.com/git-pkgs/managers v0.8.2-0.20260413100248-effbf8f1d790 h1:Za/AXmVQ7uMe0Eurinu/cfFM6+Nv2tuAhlWT0dzsyQI=
+github.com/git-pkgs/managers v0.8.2-0.20260413100248-effbf8f1d790/go.mod h1:8DR7tIQEEyPyJ7QGzStVbovnGl7tAJcrhQLzjQPzFzc=
 github.com/git-pkgs/packageurl-go v0.2.1 h1:j6VnjJiYS9b1nTLfJGsG6SLaA7Nk6Io+ta8grOyTa4o=
 github.com/git-pkgs/packageurl-go v0.2.1/go.mod h1:rcIxiG37BlQLB6FZfgdj9Fm7yjhRQd3l+5o7J0QPAk4=
 github.com/git-pkgs/purl v0.1.8 h1:iyjEHM2WIZUL9A3+q9ylrabqILsN4nOay9X6jfEjmzQ=
 github.com/git-pkgs/purl v0.1.8/go.mod h1:ihlHw3bnSLXat+9Nl9MsJZBYiG7s3NkwmvE3L/Es/sI=
 github.com/git-pkgs/vers v0.2.2 h1:42QkiIURhGN2wM8AuYYU+FbzS1YV6jmdGd1RiFp7gXs=
 github.com/git-pkgs/vers v0.2.2/go.mod h1:biTbSQK1qdbrsxDEKnqe3Jzclxz8vW6uDcwKjfUGcOo=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

manifest_test.go

@@ -0,0 +1,135 @@
+package resolve
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestWriteManifest_Dispatch(t *testing.T) {
+	dir := t.TempDir()
+	deps := []InputDep{{Name: "x", Version: "1.0"}}
+
+	supported := []string{"pip", "maven", "sbt", "pub", "mix", "lein"}
+	for _, mgr := range supported {
+		d := filepath.Join(dir, mgr)
+		if err := os.Mkdir(d, 0o755); err != nil {
+			t.Fatal(err)
+		}
+		if err := writeManifest(d, mgr, deps); err != nil {
+			t.Errorf("writeManifest(%q) returned error: %v", mgr, err)
+		}
+	}
+
+	if err := writeManifest(dir, "nonexistent", deps); err == nil {
+		t.Error("expected error for unknown manager")
+	}
+}
+
+func TestWritePubManifest(t *testing.T) {
+	dir := t.TempDir()
+	deps := []InputDep{
+		{Name: "http", Version: "^0.13.0"},
+		{Name: "path", Version: ""},
+	}
+
+	if err := writePubManifest(dir, deps); err != nil {
+		t.Fatalf("writePubManifest: %v", err)
+	}
+
+	got := readFile(t, filepath.Join(dir, "pubspec.yaml"))
+
+	mustContain(t, got, "name: resolve_tmp")
+	mustContain(t, got, "environment:")
+	mustContain(t, got, "sdk:")
+	mustContain(t, got, "dependencies:")
+	mustContain(t, got, `  http: "^0.13.0"`)
+	mustContain(t, got, "  path: any")
+}
+
+func TestWritePubManifest_NoDeps(t *testing.T) {
+	dir := t.TempDir()
+	if err := writePubManifest(dir, nil); err != nil {
+		t.Fatalf("writePubManifest: %v", err)
+	}
+	got := readFile(t, filepath.Join(dir, "pubspec.yaml"))
+	mustContain(t, got, "name: resolve_tmp")
+	mustContain(t, got, "dependencies: {}")
+}
+
+func TestWriteMixManifest(t *testing.T) {
+	dir := t.TempDir()
+	deps := []InputDep{
+		{Name: "phoenix", Version: "~> 1.7"},
+		{Name: "jason", Version: ""},
+	}
+
+	if err := writeMixManifest(dir, deps); err != nil {
+		t.Fatalf("writeMixManifest: %v", err)
+	}
+
+	got := readFile(t, filepath.Join(dir, "mix.exs"))
+
+	mustContain(t, got, "defmodule ResolveTmp.MixProject do")
+	mustContain(t, got, "use Mix.Project")
+	mustContain(t, got, "app: :resolve_tmp")
+	mustContain(t, got, `{:phoenix, "~> 1.7"}`)
+	mustContain(t, got, `{:jason, ">= 0.0.0"}`)
+}
+
+func TestWriteMixManifest_NoDeps(t *testing.T) {
+	dir := t.TempDir()
+	if err := writeMixManifest(dir, nil); err != nil {
+		t.Fatalf("writeMixManifest: %v", err)
+	}
+	got := readFile(t, filepath.Join(dir, "mix.exs"))
+	mustContain(t, got, "defp deps do")
+	mustContain(t, got, "[]")
+}
+
+func TestWriteLeinManifest(t *testing.T) {
+	dir := t.TempDir()
+	deps := []InputDep{
+		{Name: "ring/ring-core", Version: "1.9.0"},
+		{Name: "compojure", Version: ""},
+	}
+
+	if err := writeLeinManifest(dir, deps); err != nil {
+		t.Fatalf("writeLeinManifest: %v", err)
+	}
+
+	got := readFile(t, filepath.Join(dir, "project.clj"))
+
+	mustContain(t, got, "(defproject resolve-tmp")
+	mustContain(t, got, ":dependencies [")
+	mustContain(t, got, `[ring/ring-core "1.9.0"]`)
+	mustContain(t, got, `[compojure "RELEASE"]`)
+	mustContain(t, got, "[org.clojure/clojure")
+}
+
+func TestWriteLeinManifest_NoDeps(t *testing.T) {
+	dir := t.TempDir()
+	if err := writeLeinManifest(dir, nil); err != nil {
+		t.Fatalf("writeLeinManifest: %v", err)
+	}
+	got := readFile(t, filepath.Join(dir, "project.clj"))
+	// Even with no input deps, clojure itself is required
+	mustContain(t, got, "[org.clojure/clojure")
+}
+
+func readFile(t *testing.T, path string) string {
+	t.Helper()
+	b, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("reading %s: %v", path, err)
+	}
+	return string(b)
+}
+
+func mustContain(t *testing.T, haystack, needle string) {
+	t.Helper()
+	if !strings.Contains(haystack, needle) {
+		t.Errorf("expected output to contain %q\n--- got ---\n%s", needle, haystack)
+	}
+}