Move table stuff into libutil

src/libutil/table.cc

@@ -0,0 +1,40 @@
+#include "nix/util/table.hh"
+
+#include <algorithm>
+#include <cassert>
+#include <iostream>
+#include <vector>
+
+namespace nix {
+
+void printTable(Table & table)
+{
+    auto nrColumns = table.size() > 0 ? table.front().size() : 0;
+
+    std::vector<size_t> widths;
+    widths.resize(nrColumns);
+
+    for (auto & i : table) {
+        assert(i.size() == nrColumns);
+        Strings::iterator j;
+        size_t column;
+        for (j = i.begin(), column = 0; j != i.end(); ++j, ++column)
+            if (j->size() > widths[column])
+                widths[column] = j->size();
+    }
+
+    for (auto & i : table) {
+        Strings::iterator j;
+        size_t column;
+        for (j = i.begin(), column = 0; j != i.end(); ++j, ++column) {
+            std::string s = *j;
+            replace(s.begin(), s.end(), '\n', ' ');
+            std::cout << s;
+            if (column < nrColumns - 1)
+                std::cout << std::string(widths[column] - s.size() + 2, ' ');
+        }
+        std::cout << std::endl;
+    }
+}
+
+} // namespace nix