feat: .NET appsettings files in repos (#88)

Co-authored-by: Karl-Einar Bergstrøm <karl-einarb@outlook.com>

internal/provider/repo/dotnet_test.go

@@ -0,0 +1,100 @@
+package repo
+
+import (
+	"context"
+	"maps"
+	"testing"
+
+	"git.kebcloud.no/keb/lazysecrets/internal/provider"
+)
+
+func TestIsDotnet(t *testing.T) {
+	for f, want := range map[string]bool{
+		"appsettings.json":                    true,
+		"src/Api/appsettings.Production.json": true,
+		"appsettings.Example.json":            true, // listed hidden
+		"appsettings.json.bak":                false,
+		"settings.json":                       false,
+		"package.json":                        false,
+	} {
+		if IsDotnet(f) != want {
+			t.Errorf("%s: %t", f, !want)
+		}
+	}
+}
+
+func TestParseDotnet(t *testing.T) {
+	keys, err := parseDotnet("", []byte("\xef\xbb\xbf"+`{
+  "ConnectionStrings": { "Default": "Server=db;Password=hunter2" },
+  "AzureAd": { "ClientId": "abc", "ClientSecret": "@Microsoft.KeyVault(SecretUri=https://kv.vault.azure.net/secrets/ad)" },
+  "Servers": [ { "Name": "a", "ApiKey": "k" } ],
+  "Logging": { "LogLevel": { "Default": "Information" } }
+}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	got := map[string]string{}
+	for _, k := range keys {
+		ref := ""
+		if k.ref {
+			ref = " (ref)"
+		}
+		got[k.name] = k.value + ref
+	}
+	want := map[string]string{
+		"ConnectionStrings:Default": "Server=db;Password=hunter2",
+		"AzureAd:ClientId":          "abc",
+		"AzureAd:ClientSecret":      "@Microsoft.KeyVault(SecretUri=https://kv.vault.azure.net/secrets/ad) (ref)",
+		"Servers:0:Name":            "a",
+		"Servers:0:ApiKey":          "k",
+		"Logging:LogLevel:Default":  "Information",
+	}
+	if !maps.Equal(got, want) {
+		t.Errorf("got  %v\nwant %v", got, want)
+	}
+}
+
+func TestDotnetFiles(t *testing.T) {
+	root := gitRepo(t, map[string]string{
+		"src/Api/appsettings.json": `{
+  "Logging": { "LogLevel": { "Default": "Information" } },
+  "ConnectionStrings": { "Default": "Server=db;User Id=app;Password=hunter2" },
+  "AzureAd": { "ClientSecret": "@Microsoft.KeyVault(VaultName=kv;SecretName=ad)" }
+}`,
+		"src/Api/appsettings.Development.json": `{ "Logging": { "LogLevel": { "Default": "Debug" } } }`,
+	})
+	t.Setenv("JASYPT_ENCRYPTOR_PASSWORD", "")
+	ctx := context.Background()
+	p := New(Settings{Dir: root})
+	srcs, _ := p.Sources(ctx)
+	cs, err := p.Containers(ctx, srcs[0])
+	if err != nil || len(cs) != 2 {
+		t.Fatalf("files: %+v %v", cs, err)
+	}
+	for _, c := range cs {
+		if c.Detail != "dotnet · json" || c.Hidden != (c.Name == "src/Api/appsettings.Development.json") {
+			t.Errorf("%s: %q hidden %t", c.Name, c.Detail, c.Hidden)
+		}
+	}
+	settings := cs[1]
+
+	keys, _ := p.Objects(ctx, settings, provider.TypeSecret)
+	got := map[string]string{}
+	for _, k := range shown(keys) {
+		got[k.Name] = k.Detail
+	}
+	// The connection string by its value, the client secret by its name.
+	if want := map[string]string{"ConnectionStrings:Default": "", "AzureAd:ClientSecret": "reference"}; !maps.Equal(got, want) {
+		t.Errorf("keys %v, want %v", got, want)
+	}
+	link := provider.Object{Container: provider.Container{Source: srcs[0], Name: "src/Api/appsettings.json"}, Name: "ConnectionStrings:Default"}
+	if v, err := p.Value(ctx, link); err != nil || v.Reveal() != "Server=db;User Id=app;Password=hunter2" {
+		t.Errorf("value: %q %v", v.Reveal(), err)
+	}
+	if f, _ := p.File(settings, &link); f.Line != 3 {
+		t.Errorf("line %d", f.Line)
+	}
+	if d, plain := p.configDetails(dotnetType, settings); !plain || d[1].Value != "1, not matched by the secret patterns" {
+		t.Errorf("details: %+v %t", d, plain)
+	}
+}