Start stubbing out cache_dump

.gitignore

@@ -14,6 +14,7 @@ thin_repair
 thin_rmap
 
 cache_check
+cache_dump
 cache_restore
 
 *.metadata

Makefile.in

@@ -21,6 +21,7 @@
 V=@
 PROGRAMS=\
 	cache_check \
+	cache_dump \
 	cache_restore \
 	\
 	thin_check \
@@ -234,6 +235,9 @@ CACHE_CHECK_SOURCE=\
 	caching/superblock.cc
 CACHE_CHECK_OBJECTS=$(subst .cc,.o,$(CACHE_CHECK_SOURCE))
 
+CACHE_DUMP_SOURCE=$(SOURCE)
+CACHE_DUMP_OBJECTS=$(subst .cc,.o,$(CACHE_DUMP_SOURCE))
+
 CACHE_RESTORE_SOURCE=$(SOURCE)
 CACHE_RESTORE_OBJECTS=$(subst .cc,.o,$(CACHE_RESTORE_SOURCE))
 
@@ -241,6 +245,10 @@ cache_check: $(CACHE_CHECK_OBJECTS) caching/cache_check.o
 	@echo "    [LD]  $@"
 	$(V) $(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $+ $(LIBS)
 
+cache_dump: $(CACHE_DUMP_OBJECTS) caching/cache_dump.o
+	@echo "    [LD]  $@"
+	$(V) $(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $+ $(LIBS) $(LIBEXPAT)
+
 cache_restore: $(CACHE_RESTORE_OBJECTS) caching/cache_restore.o
 	@echo "    [LD]  $@"
 	$(V) $(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $+ $(LIBS) $(LIBEXPAT)

caching/cache_dump.cc

@@ -0,0 +1,60 @@
+#include <getopt.h>
+#include <libgen.h>
+#include <iostream>
+
+#include "version.h"
+
+using namespace std;
+
+//----------------------------------------------------------------
+
+namespace {
+	void usage(ostream &out, string const &cmd) {
+		out << "Usage: " << cmd << " [options] {device|file}" << endl
+		    << "Options:" << endl
+		    << "  {-h|--help}" << endl
+		    << "  {-V|--version}" << endl;
+	}
+}
+
+//----------------------------------------------------------------
+
+int main(int argc, char **argv)
+{
+	int c;
+	char const shortopts[] = "hV";
+
+	option const longopts[] = {
+		{ "help", no_argument, NULL, 'h'},
+		{ "version", no_argument, NULL, 'V'},
+		{ NULL, no_argument, NULL, 0 }
+	};
+
+	while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
+		switch(c) {
+		case 'h':
+			usage(cout, basename(argv[0]));
+			return 0;
+
+		case 'V':
+			cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
+			return 0;
+
+		default:
+			usage(cerr, basename(argv[0]));
+			return 1;
+		}
+	}
+
+#if 0
+	if (argc == optind) {
+		cerr << "No input file provided." << endl;
+		usage(cerr, basename(argv[0]));
+		return 1;
+	}
+#endif
+
+	return 0;
+}
+
+//----------------------------------------------------------------

features/cache_dump.feature

@@ -0,0 +1,30 @@
+Feature: cache_dump
+  Scenario: print version (-V flag)
+    When I run cache_dump with -V
+    Then it should pass with version
+
+  Scenario: print version (--version flag)
+    When I run cache_dump with --version
+    Then it should pass with version
+
+  Scenario: print help (-h)
+    When I run cache_dump with -h
+    Then it should pass with:
+
+    """
+    Usage: cache_dump [options] {device|file}
+    Options:
+      {-h|--help}
+      {-V|--version}
+    """
+
+  Scenario: print help (--help)
+    When I run cache_dump with -h
+    Then it should pass with:
+
+    """
+    Usage: cache_dump [options] {device|file}
+    Options:
+      {-h|--help}
+      {-V|--version}
+    """

features/cache_restore.feature

@@ -46,3 +46,10 @@ Feature: thin_restore
     """
     No output file provided.
     """
+
+  Scenario: dump/restore is a noop
+    Given valid cache metadata
+    When I dump cache
+    And I restore cache
+    And I dump cache
+    Then cache dumps 1 and 2 should be identical

features/step_definitions/cache_steps.rb

@@ -64,3 +64,22 @@ When(/^I run cache_restore with (.*?)$/) do |opts|
   run_simple("cache_restore #{opts}", false)
 end
 
+When(/^I run cache_dump with (.*?)$/) do |opts|
+  run_simple("cache_dump #{opts}", false)
+end
+
+Given(/^valid cache metadata$/) do
+  pending # express the regexp above with the code you wish you had
+end
+
+When(/^I dump cache$/) do
+  pending # express the regexp above with the code you wish you had
+end
+
+When(/^I restore cache$/) do
+  pending # express the regexp above with the code you wish you had
+end
+
+Then(/^cache dumps (\d+) and (\d+) should be identical$/) do |arg1, arg2|
+  pending # express the regexp above with the code you wish you had
+end