satellite/console/.../consoleapi/gen: ensure go generate works

Currently the paths were set relative to the root of the module,
however the code did not ensure that we are running relative to the
module directory.

Also, ensure typescript output corresponds to our styling.

Change-Id: I2b3cbd4ea8f2615e35c7b58c6fb8851669c47885

private/apigen/tsgen.go

@@ -105,7 +105,8 @@ func (f *tsGenFile) pf(format string, a ...interface{}) {
 }
 
 func (f *tsGenFile) write() error {
-	return os.WriteFile(f.path, []byte(f.result), 0644)
+	content := strings.ReplaceAll(f.result, "\t", "    ")
+	return os.WriteFile(f.path, []byte(content), 0644)
 }
 
 func (f *tsGenFile) getStructsFromType(t reflect.Type) {

satellite/console/consoleweb/consoleapi/gen/main.go

@@ -6,7 +6,8 @@ package main
 //go:generate go run ./
 
 import (
-	"fmt"
+	"os"
+	"path/filepath"
 	"time"
 
 	"storj.io/common/uuid"
@@ -146,6 +147,33 @@ func main() {
 		})
 	}
 
-	a.MustWriteGo("satellite/console/consoleweb/consoleapi/api.gen.go")
-	a.MustWriteTS(fmt.Sprintf("web/satellite/src/api/%s.gen.ts", a.Version))
+	modroot := findModuleRootDir()
+	a.MustWriteGo(filepath.Join(modroot, "satellite", "console", "consoleweb", "consoleapi", "api.gen.go"))
+	a.MustWriteTS(filepath.Join(modroot, "web", "satellite", "src", "api", a.Version+".gen.ts"))
+}
+
+func findModuleRootDir() string {
+	dir, err := os.Getwd()
+	if err != nil {
+		panic("unable to find current working directory")
+	}
+	start := dir
+
+	for i := 0; i < 100; i++ {
+		if fileExists(filepath.Join(dir, "go.mod")) {
+			return dir
+		}
+		next := filepath.Dir(dir)
+		if next == dir {
+			break
+		}
+		dir = next
+	}
+
+	panic("unable to find go.mod starting from " + start)
+}
+
+func fileExists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
 }