Build identification strings

All client version information is moved to version.cpp, which optionally
(-DHAVE_BUILD_INFO) includes build.h. build.h is automatically generated
on supporting platforms via contrib/genbuild.sh, using git describe.

The git export-subst attribute is used to put the commit id statically
in version.cpp inside generated archives, and this value is used if no
build.h is present.

The gitian descriptors are modified to use git archive instead of a
copy, to create the src/ directory in the output. This way,
src/src/version.cpp will contain the static commit id. To prevent
gitian builds from getting the "-dirty" marker in their git-describe
generated identifiers, no touching of files or running sed on the
makefile is performed anymore. This does not seem to influence
determinism.

13 files changed, 131 insertions, 19 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 3f900fc87..9d37eb3c0 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -307,7 +307,7 @@ bool AppInit2(int argc, char* argv[])
     if (!fDebug && !pszSetDataDir[0])
         ShrinkDebugFile();
     printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
-    printf("Bitcoin version %s\n", FormatFullVersion().c_str());
+    printf("Bitcoin version %s (%s)\n", FormatFullVersion().c_str(), CLIENT_DATE.c_str());
     printf("Default data directory %s\n", GetDefaultDataDir().c_str());
 
     if (GetBoolArg("-loadblockindextest"))
diff --git a/src/main.cpp b/src/main.cpp
index 7c49316b4..7e257f48d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -18,11 +18,6 @@ using namespace boost;
 // Global state
 //
 
-// Name of client reported in the 'version' message. Report the same name
-// for both bitcoind and bitcoin-qt, to make it harder for attackers to
-// target servers or GUI users specifically.
-const std::string CLIENT_NAME("Satoshi");
-
 CCriticalSection cs_setpwalletRegistered;
 set<CWallet*> setpwalletRegistered;
 
diff --git a/src/main.h b/src/main.h
index 6c81abad5..1d46851ac 100644
--- a/src/main.h
+++ b/src/main.h
@@ -10,6 +10,7 @@
 #include "key.h"
 #include "script.h"
 #include "db.h"
+#include "version.h"
 
 #ifdef WIN32
 #include <io.h> /* for _commit */
@@ -30,10 +31,6 @@ class CInv;
 class CRequestTracker;
 class CNode;
 
-static const int CLIENT_VERSION = 60099;
-static const bool VERSION_IS_BETA = true;
-extern const std::string CLIENT_NAME;
-
 static const unsigned int MAX_BLOCK_SIZE = 1000000;
 static const unsigned int MAX_BLOCK_SIZE_GEN = MAX_BLOCK_SIZE/2;
 static const int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50;
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index 3f7e6114e..4922df599 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -43,6 +43,7 @@ LIBS += -l mingwthrd -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l w
 HEADERS = $(wildcard *.h)
 
 OBJS= \
+    obj/version.o \
     obj/checkpoints.o \
     obj/netbase.o \
     obj/addrman.o \
@@ -64,10 +65,14 @@ OBJS= \
 
 all: bitcoind.exe
 
+build.h: FORCE
+	@../share/genbuild.sh build.h
+DEFS += -DHAVE_BUILD_INFO
+
 obj/%.o: %.cpp $(HEADERS)
 	i586-mingw32msvc-g++ -c $(CFLAGS) -o $@ $<
 
-bitcoind.exe: $(OBJS:obj/%=obj/%)
+bitcoind.exe: build.h $(OBJS:obj/%=obj/%)
 	i586-mingw32msvc-g++ $(CFLAGS) -o $@ $(LIBPATHS) $^ $(LIBS)
 
 
@@ -85,3 +90,6 @@ clean:
 	-rm -f headers.h.gch
 	-rm -f bitcoind.exe
 	-rm -f test_bitcoin.exe
+	-rm -f src/build.h
+
+FORCE:
diff --git a/src/makefile.mingw b/src/makefile.mingw
index 33cc68b62..397fdf4f3 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -41,6 +41,7 @@ LIBS += -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell
 HEADERS = $(wildcard *.h)
 
 OBJS= \
+    obj/version.o \
     obj/checkpoints.o \
     obj/netbase.o \
     obj/addrman.o \
@@ -82,3 +83,4 @@ clean:
 	-del /Q obj\test\*
 	-del /Q test\*.o
 	-del /Q headers.h.gch
+	-del /Q build.h
diff --git a/src/makefile.osx b/src/makefile.osx
index ed35b33ec..439d8ef21 100644
--- a/src/makefile.osx
+++ b/src/makefile.osx
@@ -65,6 +65,7 @@ CFLAGS += -Wextra -Wno-sign-compare -Wno-char-subscripts -Wno-invalid-offsetof -
     $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
 OBJS= \
+    obj/version.o \
     obj/checkpoints.o \
     obj/netbase.o \
     obj/addrman.o \
@@ -99,6 +100,10 @@ all: bitcoind
 -include obj/*.P
 -include obj-test/*.P
 
+build.h: FORCE
+	@../share/genbuild.sh build.h
+DEFS += -DHAVE_BUILD_INFO
+
 obj/%.o: %.cpp
 	$(CXX) -c $(CFLAGS) -MMD -o $@ $<
 	@cp $(@:%.o=%.d) $(@:%.o=%.P); \
@@ -106,7 +111,7 @@ obj/%.o: %.cpp
 	      -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
 	  rm -f $(@:%.o=%.d)
 
-bitcoind: $(OBJS:obj/%=obj/%)
+bitcoind: build.h $(OBJS:obj/%=obj/%)
 	$(CXX) $(CFLAGS) -o $@ $(LIBPATHS) $^ $(LIBS)
 
 TESTOBJS := $(patsubst test/%.cpp,obj-test/%.o,$(wildcard test/*.cpp))
@@ -127,3 +132,6 @@ clean:
 	-rm -f obj-test/*.o
 	-rm -f obj/*.P
 	-rm -f obj-test/*.P
+	-rm -f src/build.h
+
+FORCE:
diff --git a/src/makefile.unix b/src/makefile.unix
index 1fb8e270f..c3727361e 100644
--- a/src/makefile.unix
+++ b/src/makefile.unix
@@ -85,6 +85,7 @@ xCXXFLAGS=-pthread -Wextra -Wno-sign-compare -Wno-char-subscripts -Wno-invalid-o
     $(DEBUGFLAGS) $(DEFS) $(HARDENING) $(CXXFLAGS)
 
 OBJS= \
+    obj/version.o \
     obj/checkpoints.o \
     obj/netbase.o \
     obj/addrman.o \
@@ -111,6 +112,10 @@ all: bitcoind
 -include obj/*.P
 -include obj-test/*.P
 
+build.h: FORCE
+	@../share/genbuild.sh build.h
+DEFS += -DHAVE_BUILD_INFO
+
 obj/%.o: %.cpp
 	$(CXX) -c $(xCXXFLAGS) -MMD -o $@ $<
 	@cp $(@:%.o=%.d) $(@:%.o=%.P); \
@@ -118,7 +123,7 @@ obj/%.o: %.cpp
 	      -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
 	  rm -f $(@:%.o=%.d)
 
-bitcoind: $(OBJS:obj/%=obj/%)
+bitcoind: build.h $(OBJS:obj/%=obj/%)
 	$(CXX) $(xCXXFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
 
 TESTOBJS := $(patsubst test/%.cpp,obj-test/%.o,$(wildcard test/*.cpp))
@@ -139,3 +144,6 @@ clean:
 	-rm -f obj-test/*.o
 	-rm -f obj/*.P
 	-rm -f obj-test/*.P
+	-rm -f src/build.h
+
+FORCE:
diff --git a/src/qt/aboutdialog.cpp b/src/qt/aboutdialog.cpp
index 08d777406..0b98befe8 100644
--- a/src/qt/aboutdialog.cpp
+++ b/src/qt/aboutdialog.cpp
@@ -2,6 +2,8 @@
 #include "ui_aboutdialog.h"
 #include "clientmodel.h"
 
+#include "version.h"
+
 AboutDialog::AboutDialog(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::AboutDialog)
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 8163da091..284bee0e8 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -88,3 +88,8 @@ QString ClientModel::formatFullVersion() const
 {
     return QString::fromStdString(FormatFullVersion());
 }
+
+QString ClientModel::formatBuildDate() const
+{
+    return QString::fromStdString(CLIENT_DATE);
+}
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 6366b4d61..8e7431a2f 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -37,6 +37,7 @@ public:
     QString getStatusBarWarnings() const;
 
     QString formatFullVersion() const;
+    QString formatBuildDate() const;
 
 private:
     OptionsModel *optionsModel;
diff --git a/src/util.cpp b/src/util.cpp
index d55e7ae10..7354df6e7 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1061,12 +1061,7 @@ string FormatVersion(int nVersion)
 
 string FormatFullVersion()
 {
-    string s = FormatVersion(CLIENT_VERSION);
-    if (VERSION_IS_BETA) {
-        s += "-";
-        s += _("beta");
-    }
-    return s;
+    return CLIENT_BUILD;
 }
 
 // Format the subversion field according to BIP 14 spec (https://en.bitcoin.it/wiki/BIP_0014)
diff --git a/src/version.cpp b/src/version.cpp
new file mode 100644
index 000000000..e1be5f491
--- /dev/null
+++ b/src/version.cpp
@@ -0,0 +1,77 @@
+// Copyright (c) 2012 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+#include <string>
+
+#include "version.h"
+
+// Name of client reported in the 'version' message. Report the same name
+// for both bitcoind and bitcoin-qt, to make it harder for attackers to
+// target servers or GUI users specifically.
+const std::string CLIENT_NAME("Satoshi");
+
+// Client version number
+#define CLIENT_VERSION_MAJOR          0
+#define CLIENT_VERSION_MINOR          6
+#define CLIENT_VERSION_REVISION       0
+#define CLIENT_VERSION_BUILD         99
+#define CLIENT_VERSION_SUFFIX   "-beta"
+
+const int CLIENT_VERSION = 1000000 * CLIENT_VERSION_MAJOR
+                         +   10000 * CLIENT_VERSION_MINOR 
+                         +     100 * CLIENT_VERSION_REVISION
+                         +       1 * CLIENT_VERSION_BUILD;
+
+
+
+// The following part of the code determines the CLIENT_BUILD variable.
+// Several mechanisms are used for this:
+// * first, if HAVE_BUILD_INFO is defined, include build.h, a file that is
+//   generated by the build environment, possibly containing the output
+//   of git-describe in a macro called BUILD_DESC
+// * secondly, if this is an exported version of the code, GIT_ARCHIVE will
+//   be defined (automatically using the export-subst git attribute), and
+//   GIT_COMMIT will contain the commit id.
+// * then, three options exist for determining CLIENT_BUILD:
+//   * if BUILD_DESC is defined, use that literally (output of git-describe)
+//   * if not, but GIT_COMMIT is defined, use v[maj].[min].[rev].[build]-g[commit]
+//   * otherwise, use v[maj].[min].[rev].[build]-unk
+// finally CLIENT_VERSION_SUFFIX is added
+
+// First, include build.h if requested
+#ifdef HAVE_BUILD_INFO
+#    include "build.h"
+#endif
+
+// git will put "#define GIT_ARCHIVE 1" on the next line inside archives. $Format:%n#define GIT_ARCHIVE 1$
+#ifdef GIT_ARCHIVE
+#    define GIT_COMMIT_ID "$Format:%h$"
+#    define GIT_COMMIT_DATE "$Format:%cD"
+#endif
+
+#define STRINGIFY(s) #s
+
+#define BUILD_DESC_FROM_COMMIT(maj,min,rev,build,commit) \
+    "v" STRINGIFY(maj) "." STRINGIFY(min) "." STRINGIFY(rev) "." STRINGIFY(build) "-g" commit
+
+#define BUILD_DESC_FROM_UNKNOWN(maj,min,rev,build) \
+    "v" STRINGIFY(maj) "." STRINGIFY(min) "." STRINGIFY(rev) "." STRINGIFY(build) "-unk"
+
+#ifndef BUILD_DESC
+#    ifdef GIT_COMMIT_ID
+#        define BUILD_DESC BUILD_DESC_FROM_COMMIT(CLIENT_VERSION_MAJOR, CLIENT_VERSION_MINOR, CLIENT_VERSION_REVISION, CLIENT_VERSION_BUILD, GIT_COMMIT_ID)
+#    else
+#        define BUILD_DESC BUILD_DESC_FROM_UNKNOWN(CLIENT_VERSION_MAJOR, CLIENT_VERSION_MINOR, CLIENT_VERSION_REVISION, CLIENT_VERSION_BUILD)
+#    endif
+#endif
+
+#ifndef BUILD_DATE
+#    ifdef GIT_COMMIT_DATE
+#        define BUILD_DATE GIT_COMMIT_DATE
+#    else
+#        define BUILD_DATE __DATE__ ", " __TIME__
+#    endif
+#endif
+
+const std::string CLIENT_BUILD(BUILD_DESC CLIENT_VERSION_SUFFIX);
+const std::string CLIENT_DATE(BUILD_DATE);
diff --git a/src/version.h b/src/version.h
new file mode 100644
index 000000000..c93b28fb7
--- /dev/null
+++ b/src/version.h
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+#ifndef BITCOIN_VERSION_H
+#define BITCOIN_VERSION_H
+
+#include <string>
+
+extern const std::string CLIENT_NAME;
+extern const std::string CLIENT_BUILD;
+extern const std::string CLIENT_DATE;
+extern const int         CLIENT_VERSION;
+
+#endif