Add cave-print-checksum-algorithms

5 files changed, 142 insertions, 0 deletions

diff --git a/src/clients/cave/Makefile.am b/src/clients/cave/Makefile.am
index 62cce44ce..c8a30b2bd 100644
--- a/src/clients/cave/Makefile.am
+++ b/src/clients/cave/Makefile.am
@@ -44,6 +44,7 @@ command_MANS = \
 	cave-print-best-version.1 \
 	cave-print-categories.1 \
 	cave-print-checksum.1 \
+	cave-print-checksum-algorithms.1 \
 	cave-print-commands.1 \
 	cave-print-dependent-ids.1 \
 	cave-print-environment-metadata.1 \
@@ -175,6 +176,7 @@ libcave_a_SOURCES = \
 	cmd_print_best_version.cc cmd_print_best_version.hh \
 	cmd_print_categories.cc cmd_print_categories.hh \
 	cmd_print_checksum.cc cmd_print_checksum.hh \
+	cmd_print_checksum_algorithms.cc cmd_print_checksum_algorithms.hh \
 	cmd_print_commands.cc cmd_print_commands.hh \
 	cmd_print_dependent_ids.cc cmd_print_dependent_ids.hh \
 	cmd_print_environment_metadata.cc cmd_print_environment_metadata.hh \
diff --git a/src/clients/cave/cmd_print_checksum.cc b/src/clients/cave/cmd_print_checksum.cc
index 7210c678d..c22624361 100644
--- a/src/clients/cave/cmd_print_checksum.cc
+++ b/src/clients/cave/cmd_print_checksum.cc
@@ -53,6 +53,7 @@ namespace
             add_usage_line("ALGORITHM --stdin");
             add_usage_line("ALGORITHM --file FILENAME");
             add_usage_line("ALGORITHM --text TEXT");
+            add_see_also("cave-print-checksum-algorithms", 1);
         }
 
         virtual std::string app_name() const
diff --git a/src/clients/cave/cmd_print_checksum_algorithms.cc b/src/clients/cave/cmd_print_checksum_algorithms.cc
new file mode 100644
index 000000000..03ebbd865
--- /dev/null
+++ b/src/clients/cave/cmd_print_checksum_algorithms.cc
@@ -0,0 +1,94 @@
+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2012 David Leverton
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "cmd_print_checksum_algorithms.hh"
+#include "command_command_line.hh"
+
+#include <paludis/util/digest_registry.hh>
+
+#include <paludis/args/do_help.hh>
+
+#include <iostream>
+
+using namespace paludis;
+using namespace paludis::cave;
+
+namespace
+{
+    struct PrintChecksumAlgorithmsCommandLine :
+        CaveCommandCommandLine
+    {
+        PrintChecksumAlgorithmsCommandLine()
+        {
+            add_usage_line("");
+            add_see_also("cave-print-checksum", 1);
+        }
+
+        virtual std::string app_name() const
+        {
+            return "cave print-checksum-algorithms";
+        }
+
+        virtual std::string app_synopsis() const
+        {
+            return "prints supported cryptographic checksum algorithms";
+        }
+
+        virtual std::string app_description() const
+        {
+            return "Prints a list of supported checksum algorithms. No formatting "
+                "is used, making the output suitable for parsing by scripts.";
+        }
+    };
+}
+
+int
+PrintChecksumAlgorithmsCommand::run(const std::shared_ptr<Environment> &,
+    const std::shared_ptr<const Sequence<std::string> > & args)
+{
+    PrintChecksumAlgorithmsCommandLine cmdline;
+    cmdline.run(args, "CAVE", "CAVE_PRINT_CHECKSUM_ALGORITHMS_OPTIONS", "CAVE_PRINT_CHECKSUM_ALGORITHMS_CMDLINE");
+
+    if (cmdline.a_help.specified())
+    {
+        std::cout << cmdline;
+        return EXIT_SUCCESS;
+    }
+
+    if (std::distance(cmdline.begin_parameters(), cmdline.end_parameters()) != 0)
+        throw args::DoHelp("print-checksum-algorithms takes no parameters");
+
+    auto reg(DigestRegistry::get_instance());
+    for (auto it(reg->begin_algorithms()), it_end(reg->end_algorithms()); it_end != it; ++it)
+        std::cout << it->first << std::endl;
+    return EXIT_SUCCESS;
+}
+
+std::shared_ptr<args::ArgsHandler>
+PrintChecksumAlgorithmsCommand::make_doc_cmdline()
+{
+    return std::make_shared<PrintChecksumAlgorithmsCommandLine>();
+}
+
+CommandImportance
+PrintChecksumAlgorithmsCommand::importance() const
+{
+    return ci_scripting;
+}
+
diff --git a/src/clients/cave/cmd_print_checksum_algorithms.hh b/src/clients/cave/cmd_print_checksum_algorithms.hh
new file mode 100644
index 000000000..2c1105623
--- /dev/null
+++ b/src/clients/cave/cmd_print_checksum_algorithms.hh
@@ -0,0 +1,43 @@
+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2012 David Leverton
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef PALUDIS_GUARD_SRC_CLIENTS_CAVE_CMD_PRINT_CHECKSUM_ALGORITHMS_HH
+#define PALUDIS_GUARD_SRC_CLIENTS_CAVE_CMD_PRINT_CHECKSUM_ALGORITHMS_HH 1
+
+#include "command.hh"
+
+namespace paludis
+{
+    namespace cave
+    {
+        class PALUDIS_VISIBLE PrintChecksumAlgorithmsCommand :
+            public Command
+        {
+            public:
+                virtual CommandImportance importance() const PALUDIS_ATTRIBUTE((warn_unused_result));
+
+                int run(const std::shared_ptr<Environment> &,
+                    const std::shared_ptr<const Sequence<std::string> > & args);
+
+                std::shared_ptr<args::ArgsHandler> make_doc_cmdline();
+        };
+    }
+}
+
+#endif
diff --git a/src/clients/cave/command_factory.cc b/src/clients/cave/command_factory.cc
index d08d67965..b373b1a2d 100644
--- a/src/clients/cave/command_factory.cc
+++ b/src/clients/cave/command_factory.cc
@@ -59,6 +59,7 @@
 #include "cmd_print_best_version.hh"
 #include "cmd_print_categories.hh"
 #include "cmd_print_checksum.hh"
+#include "cmd_print_checksum_algorithms.hh"
 #include "cmd_print_commands.hh"
 #include "cmd_print_dependent_ids.hh"
 #include "cmd_print_environment_metadata.hh"
@@ -181,6 +182,7 @@ CommandFactory::CommandFactory() :
     _imp->handlers.insert(std::make_pair("print-best-version", std::bind(&make_command<PrintBestVersionCommand>)));
     _imp->handlers.insert(std::make_pair("print-categories", std::bind(&make_command<PrintCategoriesCommand>)));
     _imp->handlers.insert(std::make_pair("print-checksum", std::bind(&make_command<PrintChecksumCommand>)));
+    _imp->handlers.insert(std::make_pair("print-checksum-algorithms", std::bind(&make_command<PrintChecksumAlgorithmsCommand>)));
     _imp->handlers.insert(std::make_pair("print-commands", std::bind(&make_command<PrintCommandsCommand>)));
     _imp->handlers.insert(std::make_pair("print-dependent-ids", std::bind(&make_command<PrintDependentIDsCommand>)));
     _imp->handlers.insert(std::make_pair("print-environment-metadata", std::bind(&make_command<PrintEnvironmentMetadataCommand>)));