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authorDavid Kalnischkies <kalnischkies@gmail.com>2011-04-01 16:14:24 +0200
committerDavid Kalnischkies <kalnischkies@gmail.com>2011-04-01 16:14:24 +0200
commit4128c84679e54e2afda7913946facaf9c52cd3eb (patch)
treec9892b140c5cf30d2336b8a57c1521a58d2d95ad
parent40795fca99c72b0b43124cdfffb40e8fa3c4d952 (diff)
add a small wrapper to use the internal apt solver as an external one
-rw-r--r--cmdline/apt-internal-solver.cc129
-rw-r--r--cmdline/makefile7
2 files changed, 136 insertions, 0 deletions
diff --git a/cmdline/apt-internal-solver.cc b/cmdline/apt-internal-solver.cc
new file mode 100644
index 000000000..83d79e42a
--- /dev/null
+++ b/cmdline/apt-internal-solver.cc
@@ -0,0 +1,129 @@
+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* #####################################################################
+
+ cover around the internal solver to be able to run it like an external
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <apt-pkg/error.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/init.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/edsp.h>
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/fileutl.h>
+
+#include <config.h>
+#include <apti18n.h>
+
+#include <unistd.h>
+#include <cstdio>
+ /*}}}*/
+
+// ShowHelp - Show a help screen /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ShowHelp(CommandLine &CmdL) {
+ ioprintf(std::cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,VERSION,
+ COMMON_ARCH,__DATE__,__TIME__);
+
+ std::cout <<
+ _("Usage: apt-internal-resolver\n"
+ "\n"
+ "apt-internal-resolver is an interface to use the current internal\n"
+ "like an external resolver for the APT family for debugging or alike\n"
+ "\n"
+ "Options:\n"
+ " -h This help text.\n"
+ " -q Loggable output - no progress indicator\n"
+ " -c=? Read this configuration file\n"
+ " -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n"
+ "apt.conf(5) manual pages for more information and options.\n"
+ " This APT has Super Cow Powers.\n");
+ return true;
+}
+ /*}}}*/
+int main(int argc,const char *argv[]) /*{{{*/
+{
+ CommandLine::Args Args[] = {
+ {'h',"help","help",0},
+ {'v',"version","version",0},
+ {'q',"quiet","quiet",CommandLine::IntLevel},
+ {'q',"silent","quiet",CommandLine::IntLevel},
+ {0,0,0,0}};
+
+ CommandLine CmdL(Args,_config);
+ if (pkgInitConfig(*_config) == false ||
+ CmdL.Parse(argc,argv) == false) {
+ _error->DumpErrors();
+ return 2;
+ }
+
+ // See if the help should be shown
+ if (_config->FindB("help") == true ||
+ _config->FindB("version") == true) {
+ ShowHelp(CmdL);
+ return 1;
+ }
+
+ // Deal with stdout not being a tty
+ if (!isatty(STDOUT_FILENO) && _config->FindI("quiet", -1) == -1)
+ _config->Set("quiet","1");
+
+ if (_config->FindI("quiet", 0) < 1)
+ _config->Set("Debug::EDSP::WriteSolution", true);
+
+ _config->Set("APT::Solver::Name", "internal");
+ _config->Set("edsp::scenario", "stdin");
+ int input = STDIN_FILENO;
+ FILE* output = stdout;
+ SetNonBlock(input, false);
+
+ if (pkgInitSystem(*_config,_system) == false) {
+ std::cerr << "System could not be initialized!" << std::endl;
+ return 1;
+ }
+
+ if (WaitFd(input, false, 5) == false)
+ std::cerr << "WAIT timed out in the resolver" << std::endl;
+
+ std::list<std::string> install, remove;
+ bool upgrade, distUpgrade, autoRemove;
+ if (EDSP::ReadRequest(input, install, remove, upgrade, distUpgrade, autoRemove) == false) {
+ std::cerr << "Parsing the request failed!" << std::endl;
+ return 2;
+ }
+
+ pkgCacheFile CacheFile;
+ CacheFile.Open(NULL, false);
+
+ if (EDSP::ApplyRequest(install, remove, CacheFile) == false) {
+ std::cerr << "Failed to apply request to depcache!" << std::endl;
+ return 3;
+ }
+ for (std::list<std::string>::const_iterator i = install.begin();
+ i != install.end(); ++i)
+ CacheFile->MarkInstall(CacheFile->FindPkg(*i), true);
+
+ pkgProblemResolver Fix(CacheFile);
+ if (Fix.Resolve() == false) {
+ EDSP::WriteError("An error occured", output);
+ return 0;
+ }
+
+ if (EDSP::WriteSolution(CacheFile, output) == false) {
+ std::cerr << "Failed to output the solution!" << std::endl;
+ return 4;
+ }
+
+ bool const Errors = _error->PendingError();
+ if (_config->FindI("quiet",0) > 0)
+ _error->DumpErrors();
+ else
+ _error->DumpErrors(GlobalError::DEBUG);
+ return Errors == true ? 100 : 0;
+}
+ /*}}}*/
diff --git a/cmdline/makefile b/cmdline/makefile
index 917ccc96a..4462ccaf4 100644
--- a/cmdline/makefile
+++ b/cmdline/makefile
@@ -64,3 +64,10 @@ include $(COPY_H)
#TO=$(BIN)
#TARGET=program
#include $(COPY_H)
+
+# The internal solver acting as an external
+PROGRAM=apt-internal-solver
+SLIBS = -lapt-pkg $(INTLLIBS)
+LIB_MAKES = apt-pkg/makefile
+SOURCE = apt-internal-solver.cc
+include $(PROGRAM_H)