Let syncing specify a revision

36 files changed, 107 insertions, 27 deletions

diff --git a/paludis/repositories/accounts/accounts_repository.cc b/paludis/repositories/accounts/accounts_repository.cc
index 8b30942..5400bac 100644
--- a/paludis/repositories/accounts/accounts_repository.cc
+++ b/paludis/repositories/accounts/accounts_repository.cc
@@ -449,6 +449,7 @@ AccountsRepository::perform_hook(
 bool
 AccountsRepository::sync(
         const std::string &,
+        const std::string &,
         const std::shared_ptr<OutputManager> &) const
 {
     return false;
diff --git a/paludis/repositories/accounts/accounts_repository.hh b/paludis/repositories/accounts/accounts_repository.hh
index 0c6cc09..9234ab1 100644
--- a/paludis/repositories/accounts/accounts_repository.hh
+++ b/paludis/repositories/accounts/accounts_repository.hh
@@ -143,7 +143,11 @@ namespace paludis
                 virtual HookResult perform_hook(
                         const Hook & hook,
                         const std::shared_ptr<OutputManager> &);
-                virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+
+                virtual bool sync(
+                        const std::string &,
+                        const std::string &,
+                        const std::shared_ptr<OutputManager> &) const;
 
                 ///\}
 
diff --git a/paludis/repositories/e/e_installed_repository.cc b/paludis/repositories/e/e_installed_repository.cc
index 06aebc6..2c670d1 100644
--- a/paludis/repositories/e/e_installed_repository.cc
+++ b/paludis/repositories/e/e_installed_repository.cc
@@ -398,7 +398,7 @@ EInstalledRepository::populate_sets() const
 }
 
 bool
-EInstalledRepository::sync(const std::string &, const std::shared_ptr<OutputManager> &) const
+EInstalledRepository::sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const
 {
     return false;
 }
diff --git a/paludis/repositories/e/e_installed_repository.hh b/paludis/repositories/e/e_installed_repository.hh
index 3d076d7..9aa1825 100644
--- a/paludis/repositories/e/e_installed_repository.hh
+++ b/paludis/repositories/e/e_installed_repository.hh
@@ -90,6 +90,7 @@ namespace paludis
 
                 virtual bool sync(
                         const std::string &,
+                        const std::string &,
                         const std::shared_ptr<OutputManager> &) const;
 
                 ///\name For use by EInstalledRepositoryID
diff --git a/paludis/repositories/e/e_repository.cc b/paludis/repositories/e/e_repository.cc
index b5d502d..e233508 100644
--- a/paludis/repositories/e/e_repository.cc
+++ b/paludis/repositories/e/e_repository.cc
@@ -697,6 +697,7 @@ ERepository::need_mirrors() const
 bool
 ERepository::sync(
         const std::string & suffix,
+        const std::string & revision,
         const std::shared_ptr<OutputManager> & output_manager) const
 {
     Context context("When syncing repository '" + stringify(name()) + "':");
@@ -720,8 +721,10 @@ ERepository::sync(
         DefaultSyncer syncer(make_named_values<SyncerParams>(
                     n::environment() = _imp->params.environment(),
                     n::local() = stringify(_imp->params.location()),
-                    n::remote() = *s
+                    n::remote() = *s,
+                    n::revision() = revision
                 ));
+
         SyncOptions opts(make_named_values<SyncOptions>(
                     n::filter_file() = _imp->layout->sync_filter_file(),
                     n::options() = sync_options,
diff --git a/paludis/repositories/e/e_repository.hh b/paludis/repositories/e/e_repository.hh
index e800f84..3fc9c5e 100644
--- a/paludis/repositories/e/e_repository.hh
+++ b/paludis/repositories/e/e_repository.hh
@@ -105,7 +105,10 @@ namespace paludis
 
             /* RepositorySyncableInterface */
 
-            virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+            virtual bool sync(
+                    const std::string &,
+                    const std::string &,
+                    const std::shared_ptr<OutputManager> &) const;
 
             /* RepositoryEnvironmentVariableInterface */
 
diff --git a/paludis/repositories/fake/fake_repository_base.cc b/paludis/repositories/fake/fake_repository_base.cc
index a45a825..1c5e24e 100644
--- a/paludis/repositories/fake/fake_repository_base.cc
+++ b/paludis/repositories/fake/fake_repository_base.cc
@@ -200,6 +200,7 @@ FakeRepositoryBase::perform_hook(const Hook &, const std::shared_ptr<OutputManag
 bool
 FakeRepositoryBase::sync(
         const std::string &,
+        const std::string &,
         const std::shared_ptr<OutputManager> &) const
 {
     return false;
diff --git a/paludis/repositories/fake/fake_repository_base.hh b/paludis/repositories/fake/fake_repository_base.hh
index a97b848..f1b0567 100644
--- a/paludis/repositories/fake/fake_repository_base.hh
+++ b/paludis/repositories/fake/fake_repository_base.hh
@@ -114,7 +114,7 @@ namespace paludis
             virtual bool has_category_named(const CategoryNamePart &, const RepositoryContentMayExcludes &) const
                 PALUDIS_ATTRIBUTE((warn_unused_result));
 
-            virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+            virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
             ///\name Set methods
             ///\{
diff --git a/paludis/repositories/gemcutter/gemcutter_repository.cc b/paludis/repositories/gemcutter/gemcutter_repository.cc
index 563e6cd..b03a21b 100644
--- a/paludis/repositories/gemcutter/gemcutter_repository.cc
+++ b/paludis/repositories/gemcutter/gemcutter_repository.cc
@@ -247,7 +247,7 @@ GemcutterRepository::some_ids_might_not_be_masked() const
 }
 
 bool
-GemcutterRepository::sync(const std::string &, const std::shared_ptr<OutputManager> &) const
+GemcutterRepository::sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const
 {
     return false;
 }
diff --git a/paludis/repositories/gemcutter/gemcutter_repository.hh b/paludis/repositories/gemcutter/gemcutter_repository.hh
index ea08595..428d0a6 100644
--- a/paludis/repositories/gemcutter/gemcutter_repository.hh
+++ b/paludis/repositories/gemcutter/gemcutter_repository.hh
@@ -89,7 +89,7 @@ namespace paludis
                 virtual bool some_ids_might_not_be_masked() const;
                 virtual void invalidate();
 
-                virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+                virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
                 ///\name RepositoryFactory functions
                 ///\{
diff --git a/paludis/repositories/repository/repository_repository.cc b/paludis/repositories/repository/repository_repository.cc
index 8718a4b..0da3736 100644
--- a/paludis/repositories/repository/repository_repository.cc
+++ b/paludis/repositories/repository/repository_repository.cc
@@ -259,7 +259,7 @@ RepositoryRepository::some_ids_might_not_be_masked() const
 }
 
 bool
-RepositoryRepository::sync(const std::string &, const std::shared_ptr<OutputManager> &) const
+RepositoryRepository::sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const
 {
     return false;
 }
@@ -477,7 +477,7 @@ RepositoryRepository::merge(const MergeParams & m)
         }
 
         m.output_manager()->stdout_stream() << "Syncing..." << std::endl;
-        _imp->params.environment()->repository_from_new_config_file(config_filename_file)->sync("", m.output_manager());
+        _imp->params.environment()->repository_from_new_config_file(config_filename_file)->sync("", "", m.output_manager());
 
         /* the repo we'd get before syncing is mostly unusable */
         const std::shared_ptr<Repository> newly_created_repo(
diff --git a/paludis/repositories/repository/repository_repository.hh b/paludis/repositories/repository/repository_repository.hh
index 006ad7b..6046078 100644
--- a/paludis/repositories/repository/repository_repository.hh
+++ b/paludis/repositories/repository/repository_repository.hh
@@ -95,7 +95,7 @@ namespace paludis
                 virtual bool some_ids_might_not_be_masked() const;
                 virtual void invalidate();
 
-                virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+                virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
                 virtual bool is_suitable_destination_for(const std::shared_ptr<const PackageID> &) const
                     PALUDIS_ATTRIBUTE((warn_unused_result));
diff --git a/paludis/repositories/unavailable/unavailable_repository.cc b/paludis/repositories/unavailable/unavailable_repository.cc
index 428b77d..4739c72 100644
--- a/paludis/repositories/unavailable/unavailable_repository.cc
+++ b/paludis/repositories/unavailable/unavailable_repository.cc
@@ -316,6 +316,7 @@ UnavailableRepository::some_ids_might_not_be_masked() const
 bool
 UnavailableRepository::sync(
         const std::string & suffix,
+        const std::string & revision,
         const std::shared_ptr<OutputManager> & output_manager) const
 {
     Context context("When syncing repository '" + stringify(name()) + "':");
@@ -339,8 +340,10 @@ UnavailableRepository::sync(
         DefaultSyncer syncer(make_named_values<SyncerParams>(
                     n::environment() = _imp->params.environment(),
                     n::local() = stringify(_imp->params.location()),
-                    n::remote() = *s
+                    n::remote() = *s,
+                    n::revision() = revision
                     ));
+
         SyncOptions opts(make_named_values<SyncOptions>(
                     n::filter_file() = FSPath("/dev/null"),
                     n::options() = sync_options,
diff --git a/paludis/repositories/unavailable/unavailable_repository.hh b/paludis/repositories/unavailable/unavailable_repository.hh
index fdab7db..3d5fdd5 100644
--- a/paludis/repositories/unavailable/unavailable_repository.hh
+++ b/paludis/repositories/unavailable/unavailable_repository.hh
@@ -94,7 +94,7 @@ namespace paludis
                 virtual bool some_ids_might_not_be_masked() const;
                 virtual void invalidate();
 
-                virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+                virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
                 ///\name RepositoryFactory functions
                 ///\{
diff --git a/paludis/repositories/unpackaged/installed_repository.cc b/paludis/repositories/unpackaged/installed_repository.cc
index 7d064f1..14cc032 100644
--- a/paludis/repositories/unpackaged/installed_repository.cc
+++ b/paludis/repositories/unpackaged/installed_repository.cc
@@ -509,6 +509,7 @@ InstalledUnpackagedRepository::perform_hook(const Hook &, const std::shared_ptr<
 bool
 InstalledUnpackagedRepository::sync(
         const std::string &,
+        const std::string &,
         const std::shared_ptr<OutputManager> &) const
 {
     return false;
diff --git a/paludis/repositories/unpackaged/installed_repository.hh b/paludis/repositories/unpackaged/installed_repository.hh
index d364fa2..ba025db 100644
--- a/paludis/repositories/unpackaged/installed_repository.hh
+++ b/paludis/repositories/unpackaged/installed_repository.hh
@@ -140,7 +140,7 @@ namespace paludis
             virtual HookResult perform_hook(const Hook & hook, const std::shared_ptr<OutputManager> &)
                 PALUDIS_ATTRIBUTE((warn_unused_result));
 
-            virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+            virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
     };
 }
 
diff --git a/paludis/repositories/unpackaged/unpackaged_repository.cc b/paludis/repositories/unpackaged/unpackaged_repository.cc
index 6474c26..dc78884 100644
--- a/paludis/repositories/unpackaged/unpackaged_repository.cc
+++ b/paludis/repositories/unpackaged/unpackaged_repository.cc
@@ -303,6 +303,7 @@ UnpackagedRepository::perform_hook(const Hook &, const std::shared_ptr<OutputMan
 bool
 UnpackagedRepository::sync(
         const std::string &,
+        const std::string &,
         const std::shared_ptr<OutputManager> &) const
 {
     return false;
diff --git a/paludis/repositories/unpackaged/unpackaged_repository.hh b/paludis/repositories/unpackaged/unpackaged_repository.hh
index c3129c4..4310965 100644
--- a/paludis/repositories/unpackaged/unpackaged_repository.hh
+++ b/paludis/repositories/unpackaged/unpackaged_repository.hh
@@ -108,7 +108,7 @@ namespace paludis
 
             virtual const bool is_unimportant() const;
 
-            virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+            virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
             /* Keys */
 
diff --git a/paludis/repositories/unwritten/unwritten_repository.cc b/paludis/repositories/unwritten/unwritten_repository.cc
index 9bf0aa6..c23cd84 100644
--- a/paludis/repositories/unwritten/unwritten_repository.cc
+++ b/paludis/repositories/unwritten/unwritten_repository.cc
@@ -264,6 +264,7 @@ UnwrittenRepository::some_ids_might_not_be_masked() const
 bool
 UnwrittenRepository::sync(
         const std::string & suffix,
+        const std::string & revision,
         const std::shared_ptr<OutputManager> & output_manager) const
 {
     Context context("When syncing repository '" + stringify(name()) + "':");
@@ -287,8 +288,10 @@ UnwrittenRepository::sync(
         DefaultSyncer syncer(make_named_values<SyncerParams>(
                     n::environment() = _imp->params.environment(),
                     n::local() = stringify(_imp->params.location()),
-                    n::remote() = *s
+                    n::remote() = *s,
+                    n::revision() = revision
                     ));
+
         SyncOptions opts(make_named_values<SyncOptions>(
                     n::filter_file() = FSPath("/dev/null"),
                     n::options() = sync_options,
diff --git a/paludis/repositories/unwritten/unwritten_repository.hh b/paludis/repositories/unwritten/unwritten_repository.hh
index 7abde04..5c29395 100644
--- a/paludis/repositories/unwritten/unwritten_repository.hh
+++ b/paludis/repositories/unwritten/unwritten_repository.hh
@@ -93,7 +93,7 @@ namespace paludis
                 virtual bool some_ids_might_not_be_masked() const;
                 virtual void invalidate();
 
-                virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> & output_manager) const;
+                virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> & output_manager) const;
 
                 ///\name RepositoryFactory functions
                 ///\{
diff --git a/paludis/repositories/virtuals/installed_virtuals_repository.cc b/paludis/repositories/virtuals/installed_virtuals_repository.cc
index 413b8bf..ff4ec82 100644
--- a/paludis/repositories/virtuals/installed_virtuals_repository.cc
+++ b/paludis/repositories/virtuals/installed_virtuals_repository.cc
@@ -391,6 +391,7 @@ InstalledVirtualsRepository::populate_sets() const
 bool
 InstalledVirtualsRepository::sync(
         const std::string &,
+        const std::string &,
         const std::shared_ptr<OutputManager> &) const
 {
     return false;
diff --git a/paludis/repositories/virtuals/installed_virtuals_repository.hh b/paludis/repositories/virtuals/installed_virtuals_repository.hh
index 037232d..c78d813 100644
--- a/paludis/repositories/virtuals/installed_virtuals_repository.hh
+++ b/paludis/repositories/virtuals/installed_virtuals_repository.hh
@@ -108,7 +108,7 @@ namespace paludis
 
             virtual bool some_ids_might_not_be_masked() const;
 
-            virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+            virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
             /* Keys */
 
diff --git a/paludis/repositories/virtuals/virtuals_repository.cc b/paludis/repositories/virtuals/virtuals_repository.cc
index 86dec79..ca1e9aa 100644
--- a/paludis/repositories/virtuals/virtuals_repository.cc
+++ b/paludis/repositories/virtuals/virtuals_repository.cc
@@ -462,6 +462,7 @@ VirtualsRepository::perform_hook(const Hook &, const std::shared_ptr<OutputManag
 bool
 VirtualsRepository::sync(
         const std::string &,
+        const std::string &,
         const std::shared_ptr<OutputManager> &) const
 {
     return false;
diff --git a/paludis/repositories/virtuals/virtuals_repository.hh b/paludis/repositories/virtuals/virtuals_repository.hh
index c83a299..430cd82 100644
--- a/paludis/repositories/virtuals/virtuals_repository.hh
+++ b/paludis/repositories/virtuals/virtuals_repository.hh
@@ -106,7 +106,7 @@ namespace paludis
 
             virtual bool some_ids_might_not_be_masked() const;
 
-            virtual bool sync(const std::string &, const std::shared_ptr<OutputManager> &) const;
+            virtual bool sync(const std::string &, const std::string &, const std::shared_ptr<OutputManager> &) const;
 
             /* RepositoryMakeVirtualsInterface */
 
diff --git a/paludis/repository.hh b/paludis/repository.hh
index 66f0c80..1d6b64d 100644
--- a/paludis/repository.hh
+++ b/paludis/repository.hh
@@ -460,10 +460,12 @@ namespace paludis
              *
              * \return True if we synced successfully, false if we skipped sync.
              * \since 0.42 (previously in an interface)
-             * \since 0.55 takes a suffix
+             * \since 0.55 takes a suffix (may be empty)
+             * \since 0.61 takes a revision (may be empty)
              */
             virtual bool sync(
                     const std::string & suffix,
+                    const std::string & revision,
                     const std::shared_ptr<OutputManager> &) const = 0;
 
             /**
diff --git a/paludis/syncer.cc b/paludis/syncer.cc
index 682d429..9a6a26e 100644
--- a/paludis/syncer.cc
+++ b/paludis/syncer.cc
@@ -1,7 +1,7 @@
 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
 
 /*
- * Copyright (c) 2006, 2007, 2008, 2009, 2010 Ciaran McCreesh
+ * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Ciaran McCreesh
  * Copyright (c) 2006 Stephen Klimaszewski
  * Copyright (c) 2007 David Leverton
  *
@@ -52,6 +52,7 @@ SyncFailedError::SyncFailedError(const std::string & msg) throw () :
 DefaultSyncer::DefaultSyncer(const SyncerParams & params) :
     _local(params.local()),
     _remote(params.remote()),
+    _revision(params.revision()),
     _environment(params.environment())
 {
     std::string::size_type p(_remote.find("://")), q(_remote.find(":"));
@@ -93,7 +94,11 @@ DefaultSyncer::sync(const SyncOptions & opts) const
     std::shared_ptr<const FSPathSequence> fetchers_dirs(_environment->fetchers_dirs());
     std::shared_ptr<const FSPathSequence> syncers_dirs(_environment->syncers_dirs());
 
-    Process process(ProcessCommand(stringify(_syncer) + " " + opts.options() + " '" + _local + "' '" + _remote + "'"));
+    std::string revision;
+    if (! _revision.empty())
+        revision = " --revision='" + _revision + "'";
+
+    Process process(ProcessCommand(stringify(_syncer) + " " + opts.options() + revision + " '" + _local + "' '" + _remote + "'"));
 
     process
         .setenv("PALUDIS_ACTION", "sync")
diff --git a/paludis/syncer.hh b/paludis/syncer.hh
index d06e8e4..bb12cfa 100644
--- a/paludis/syncer.hh
+++ b/paludis/syncer.hh
@@ -1,7 +1,7 @@
 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
 
 /*
- * Copyright (c) 2006, 2007, 2008, 2009, 2010 Ciaran McCreesh
+ * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Ciaran McCreesh
  *
  * 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
@@ -46,6 +46,7 @@ namespace paludis
         typedef Name<struct name_options> options;
         typedef Name<struct name_output_manager> output_manager;
         typedef Name<struct name_remote> remote;
+        typedef Name<struct name_revision> revision;
     }
 
     /**
@@ -75,8 +76,17 @@ namespace paludis
     struct SyncerParams
     {
         NamedValue<n::environment, const Environment *> environment;
+
         NamedValue<n::local, std::string> local;
+
         NamedValue<n::remote, std::string> remote;
+
+        /**
+         * Usually empty, and not supported by most syncers.
+         *
+         * \since 0.61
+         */
+        NamedValue<n::revision, std::string> revision;
     };
 
     /**
@@ -116,7 +126,7 @@ namespace paludis
         public Syncer
     {
         private:
-            std::string _local, _remote;
+            std::string _local, _remote, _revision;
             const Environment *_environment;
 
             std::string _syncer;
diff --git a/paludis/syncers/dobzr.in b/paludis/syncers/dobzr.in
index 1337c42..d44bfe7 100644
--- a/paludis/syncers/dobzr.in
+++ b/paludis/syncers/dobzr.in
@@ -52,6 +52,10 @@ while [[ $# -gt 0 ]]; do
             echo "        --bzr-switch-option=OPTION         Pass OPTION to bzr switch"
             exit 0
             ;;
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
 
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
diff --git a/paludis/syncers/docvs.in b/paludis/syncers/docvs.in
index f4daa69..3a5e78b 100644
--- a/paludis/syncers/docvs.in
+++ b/paludis/syncers/docvs.in
@@ -43,6 +43,11 @@ while [[ $# -gt 0 ]]; do
             exit 0
             ;;
 
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
+
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
             ;;
diff --git a/paludis/syncers/dodarcs.in b/paludis/syncers/dodarcs.in
index 6907c5b..96d1529 100644
--- a/paludis/syncers/dodarcs.in
+++ b/paludis/syncers/dodarcs.in
@@ -53,6 +53,11 @@ while [[ $# -gt 0 ]]; do
             exit 0
             ;;
 
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
+
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
             ;;
diff --git a/paludis/syncers/dogit.in b/paludis/syncers/dogit.in
index 13a3136..71ee461 100644
--- a/paludis/syncers/dogit.in
+++ b/paludis/syncers/dogit.in
@@ -20,6 +20,7 @@ GIT_PULL_OPTIONS=( )
 GIT_FETCH_OPTIONS=( )
 
 GIT_BRANCH=
+GIT_REVISION=
 GIT_USE_RESET=true
 
 while [[ $# -gt 0 ]]; do
@@ -41,6 +42,10 @@ while [[ $# -gt 0 ]]; do
             GIT_BRANCH="${1#*=}"
             ;;
 
+        --revision=*)
+            GIT_REVISION="${1#*=}"
+            ;;
+
         --reset)
             ewarn "--reset is now the default for git syncers. It should no longer be specified manually."
             GIT_USE_RESET=true
@@ -68,6 +73,7 @@ while [[ $# -gt 0 ]]; do
 
             echo "    Options:"
             echo "        --branch=BRANCH                 Specify the branch to use"
+            echo "        --revision=REVISION             Specify the revision to use"
             echo "        --git-clone-option=OPTION       Pass OPTION to git clone"
             echo "        --git-pull-option=OPTION        Pass OPTION to git pull (if --no-reset)"
             echo "        --git-fetch-option=OPTION       Pass OPTION to git fetch (unless --no-reset)"
@@ -129,13 +135,13 @@ if [[ -d "${LOCAL}/.git" ]]; then
     if ${GIT_USE_RESET} ; then
         cd "${LOCAL}"
         ${GIT_WRAPPER} git fetch "${GIT_FETCH_OPTIONS[@]}" origin || exit $?
-        ${GIT_WRAPPER} git reset --hard origin/${GIT_BRANCH:-master} || exit $?
+        ${GIT_WRAPPER} git reset --hard ${GIT_REVISION:-origin/${GIT_BRANCH:-master}} || exit $?
     else
         cd "${LOCAL}"
-        ${GIT_WRAPPER} git pull "${GIT_PULL_OPTIONS[@]}" origin ${GIT_BRANCH} || exit $?
+        ${GIT_WRAPPER} git pull "${GIT_PULL_OPTIONS[@]}" origin ${GIT_REVISION:-${GIT_BRANCH}} || exit $?
     fi
 else
     ${GIT_WRAPPER} git clone "${GIT_CLONE_OPTIONS[@]}" "${REMOTE}" "${LOCAL}" || exit $?
-    cd "${LOCAL}" && ${GIT_WRAPPER} git reset --hard origin${GIT_BRANCH:+/${GIT_BRANCH}} || exit $?
+    cd "${LOCAL}" && ${GIT_WRAPPER} git reset --hard ${GIT_REVISION:-origin${GIT_BRANCH:+/${GIT_BRANCH}}} || exit $?
 fi
 
diff --git a/paludis/syncers/dohg.in b/paludis/syncers/dohg.in
index f002bd4..8366b55 100644
--- a/paludis/syncers/dohg.in
+++ b/paludis/syncers/dohg.in
@@ -61,6 +61,11 @@ while [[ $# -gt 0 ]]; do
             exit 0
             ;;
 
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
+
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
             ;;
diff --git a/paludis/syncers/dorsync.in b/paludis/syncers/dorsync.in
index 1be780a..0328ed5 100644
--- a/paludis/syncers/dorsync.in
+++ b/paludis/syncers/dorsync.in
@@ -53,6 +53,11 @@ while [[ $# -gt 0 ]]; do
             exit 0
             ;;
 
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
+
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
             ;;
diff --git a/paludis/syncers/dosvn.in b/paludis/syncers/dosvn.in
index 0381666..d642f93 100644
--- a/paludis/syncers/dosvn.in
+++ b/paludis/syncers/dosvn.in
@@ -42,6 +42,11 @@ while [[ $# -gt 0 ]]; do
             exit 0
             ;;
 
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
+
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
             ;;
diff --git a/paludis/syncers/dotar.in b/paludis/syncers/dotar.in
index 2436f41..e5f2464 100644
--- a/paludis/syncers/dotar.in
+++ b/paludis/syncers/dotar.in
@@ -85,6 +85,11 @@ while [[ $# -gt 0 ]]; do
             exit 0
             ;;
 
+        --revision=*)
+            eerror "${0}: --revision unsupported"
+            exit 1
+            ;;
+
         --*)
             ewarn "${0}: unknown option '${1%%=*}'"
             ;;
diff --git a/src/clients/cave/cmd_sync.cc b/src/clients/cave/cmd_sync.cc
index b8f17b6..dd9b769 100644
--- a/src/clients/cave/cmd_sync.cc
+++ b/src/clients/cave/cmd_sync.cc
@@ -199,7 +199,7 @@ namespace
             {
                 const std::shared_ptr<Repository> repo(env->package_database()->fetch_repository(name));
 
-                if (! repo->sync(cmdline.a_suffix.argument(), output_manager))
+                if (! repo->sync(cmdline.a_suffix.argument(), "", output_manager))
                     skipped = true;
                 success = true;
             }