CmdReport: Added findExtension with auto-completion

src/commands/CmdReport.cpp

@@ -26,9 +26,40 @@
 
 #include <cmake.h>
 #include <commands.h>
+#include <shared.h>
+#include <format.h>
 #include <iostream>
 #include <sstream>
 
+////////////////////////////////////////////////////////////////////////////////
+// Given a partial match for an extension script name, find the full patch of
+// the extension it may match.
+static std::string findExtension (
+  Extensions& extensions,
+  const std::string& partial)
+{
+  auto scripts = extensions.all ();
+  std::vector <std::string> options;
+  for (auto& script : scripts)
+    options.push_back (File (script).name ());
+
+  std::vector <std::string> matches;
+  autoComplete (partial, options, matches, 3);
+
+  if (matches.size () == 0)
+    throw format ("The report '{1}' is not recognized.", partial);
+
+  if (matches.size () > 1)
+    throw format ("The report '{1}' is ambiguous, and could mean one of: {2}",
+                  partial,
+                  join (", ", matches));
+
+  // Now map matches[0] back to it's corresponding option.
+  for (auto& script : scripts)
+    if (File (script).name () == matches[0])
+      return script;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 int CmdReport (
   const std::vector <std::string>& args,