Merge branch 'master' into debian

7 files changed, 774 insertions, 50 deletions

diff --git a/GPL-3 b/GPL-3
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/GPL-3
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
index 736befb..a55a9dd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,37 @@
+# Copyright (C) 2011 Timo Weingärtner <timo@tiwe.de>
+#
+# This file is part of hadori.
+#
+# hadori is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Foobar 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 hadori.  If not, see <http://www.gnu.org/licenses/>.
+
 LDFLAGS+=-lz -lboost_program_options
 CXXFLAGS?=-O2 -Wall
 CXXFLAGS+=-std=c++0x
 CPPFLAGS+=-D_FILE_OFFSET_BITS=64
 
-all: hadori
+all: hadori.1
 
 hadori.1: hadori
-	help2man -n $< -o $@ -N --no-discard-stderr --version-string 0.1 ./$<
+	help2man -n $< -o $@ -N ./$<
 
 hadori: hadori.o
-hadori.o: hadori.C inode.h
+hadori.o: hadori.C inode.h version.h
+
+version.h:
+	test ! -d .git || git describe | sed 's/^\(.*\)$$/#define HADORI_VERSION "hadori \1"/' > $@
 
 clean:
-	rm -f hadori hadori.o
+	rm -f hadori hadori.o hadori.1
+
+.PHONY: version.h clean
diff --git a/TODO b/TODO
index 642824e..7019419 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,5 @@
 TODO/possible optimizations
 ===========================
 
-* forget inode in to_link if link count is 1 before linking
 * more debug output when attributes mismatch in handle_file()
+* perhaps use hash_map, hash_multimap for better performance?
diff --git a/hadori.1 b/hadori.1
deleted file mode 100644
index c1218b9..0000000
--- a/hadori.1
+++ /dev/null
@@ -1,32 +0,0 @@
-.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.40.4.
-.TH HADORI "1" "November 2011" "hadori 0.1" "User Commands"
-.SH NAME
-hadori \- hadori
-.SH DESCRIPTION
-Invocation: hadori [ OPTIONS ] [ ARGUMENTS ]
-OPTIONS:
-.TP
-\fB\-h\fR [ \fB\-\-help\fR ]
-print this help message
-.TP
-\fB\-t\fR [ \fB\-\-no\-time\fR ]
-ignore mtime
-.TP
-\fB\-\-hash\fR
-use adler32 hash to speed up comparing many files with
-same size and mostly identical content
-.TP
-\fB\-n\fR [ \fB\-\-dry\-run\fR ]
-don't change anything, implies \fB\-\-verbose\fR
-.TP
-\fB\-v\fR [ \fB\-\-verbose\fR ]
-show which files get linked
-.TP
-\fB\-d\fR [ \fB\-\-debug\fR ]
-show files being examined
-.TP
-\fB\-s\fR [ \fB\-\-stdin\fR ]
-read arguments from stdin, one per line
-.TP
-\fB\-0\fR [ \fB\-\-null\fR ]
-implies \fB\-\-stdin\fR, but use null bytes as delimiter
diff --git a/hadori.C b/hadori.C
index fcdebd4..44b6e97 100644
--- a/hadori.C
+++ b/hadori.C
@@ -1,10 +1,29 @@
+/*
+ * Copyright (C) 2011 Timo Weingärtner <timo@tiwe.de>
+ *
+ * This file is part of hadori.
+ *
+ * hadori is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Foobar 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 hadori.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <boost/program_options.hpp>
 namespace po = boost::program_options;
 
 #include <string>
 #include <vector>
 #include <queue>
-#include <map>
+#include <unordered_map>
 #include <iostream>
 #include <sstream>
 
@@ -17,10 +36,18 @@ namespace po = boost::program_options;
 #include <sysexits.h>
 
 #include "inode.h"
+#include "version.h"
+
+// needed for equal_range and range-for
+namespace std {
+template<typename T> T& begin(pair<T,T> & ip) {
+	return ip.first;
+}
+template<typename T> T& end(pair<T,T> & ip) {
+	return ip.second;
+}
+}
 
-std::map<ino_t, inode const> kept;
-std::map<ino_t, ino_t> to_link;
-std::multimap<off_t, ino_t> sizes;
 po::variables_map config;
 std::ostream debug(std::clog.rdbuf()), verbose(std::clog.rdbuf()), error(std::clog.rdbuf());
 
@@ -47,6 +74,10 @@ void do_link (inode const & i, std::string const & other) {
 }
 
 void handle_file(std::string const & path, struct stat const & s) {
+	static std::unordered_map<ino_t, inode const> kept;
+	static std::unordered_map<ino_t, ino_t> to_link;
+	static std::unordered_multimap<off_t, ino_t> sizes;
+	
 	debug << "examining " << path << std::endl;
 	if (kept.count(s.st_ino)) {
 		debug << "another link to inode " << s.st_ino << " that we keep" << std::endl;
@@ -56,12 +87,14 @@ void handle_file(std::string const & path, struct stat const & s) {
 		inode const & target = kept.find(to_link[s.st_ino])->second;
 		debug << "another link to inode " << s.st_ino << " that we merge with " << target << std::endl;
 		do_link(target, path);
+		if (s.st_nlink == 1)
+			to_link.erase(s.st_ino);
 		return;
 	}
 	inode f(path, s);
 	debug << f << " is new to us" << std::endl;
-	for (auto it = sizes.lower_bound(s.st_size); it != sizes.upper_bound(s.st_size); ++it) {
-		inode const & candidate = kept.find(it->second)->second;
+	for (auto const & it : sizes.equal_range(s.st_size)) {
+		inode const & candidate = kept.find(it.second)->second;
 		debug << "looking if it matches " << candidate << std::endl;
 		if (candidate.stat.st_mode != s.st_mode)
 			continue;
@@ -78,7 +111,8 @@ void handle_file(std::string const & path, struct stat const & s) {
 		if (!compare(candidate, f))
 			continue;
 		verbose << "linking " << candidate << " to " << path << std::endl;
-		to_link.insert(std::make_pair(s.st_ino, it->second));
+		if (s.st_nlink > 1)
+			to_link.insert(std::make_pair(s.st_ino, it.second));
 		if (not config.count("dry-run"))
 			do_link(candidate, path);
 		return;
@@ -154,18 +188,19 @@ int main (int const argc, char ** argv) {
 	po::options_description opts("OPTIONS");
 	opts.add_options()
 		("help,h",	"print this help message")
+		("version,V",	"print version information")
 		("no-time,t",	"ignore mtime")
 		("hash",	"use adler32 hash to speed up comparing many files with same size and mostly identical content")
 		("dry-run,n",	"don't change anything, implies --verbose")
 		("verbose,v",	"show which files get linked")
 		("debug,d",	"show files being examined")
-		("stdin,s",	"read arguments from stdin, one per line")
+		("stdin,s",	"read arguments from stdin, one per line; you can't combine that with arguments on the commandline")
 		("null,0",	"implies --stdin, but use null bytes as delimiter")
 		;
 	po::options_description all_opts;
 	all_opts.add(opts);
 	all_opts.add_options()
-		("args",	po::value< std::vector<std::string> >(), "files and directories to work on")
+		("args",	po::value<std::vector<std::string>>(), "files and directories to work on")
 		;
 	po::positional_options_description pos_opts;
 	pos_opts.add("args", -1);
@@ -173,9 +208,14 @@ int main (int const argc, char ** argv) {
 	po::notify(config);
 	
 	if (config.count("help")) {
-		error << "Invocation: hadori [ OPTIONS ] [ ARGUMENTS ]" << std::endl;
-		error << opts << std::endl;
-		return EX_USAGE;
+		std::cout << "Invocation: hadori [ OPTIONS ] [ ARGUMENTS ]" << std::endl;
+		std::cout << opts << std::endl;
+		return EX_OK;
+	}
+	
+	if (config.count("version")) {
+		std::cout << HADORI_VERSION << std::endl;
+		return EX_OK;
 	}
 	
 	if (not config.count("debug"))
@@ -189,7 +229,7 @@ int main (int const argc, char ** argv) {
 			error << "--stdin combined with commandline arguments, this is not supported." << std::endl;
 			return EX_USAGE;
 		}
-		for(std::string const & dir : config["args"].as< std::vector<std::string> >())
+		for(auto const & dir : config["args"].as<std::vector<std::string>>())
 			recurse_start(dir);
 	} else {
 		if (not config.count("stdin") and not config.count("null"))
diff --git a/inode.h b/inode.h
index 3040e71..26db923 100644
--- a/inode.h
+++ b/inode.h
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2011 Timo Weingärtner <timo@tiwe.de>
+ *
+ * This file is part of hadori.
+ *
+ * hadori is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Foobar 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 hadori.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <string>
 #include <ostream>
 #include <fstream>
diff --git a/version.h b/version.h
new file mode 100644
index 0000000..1805f4d
--- /dev/null
+++ b/version.h
@@ -0,0 +1 @@
+#define HADORI_VERSION "hadori 0.2"