+// GetChangelogPath - return a path pointing to a changelog file or dir /*{{{*/
+// ---------------------------------------------------------------------
+/* This returns a "path" string for the changelog url construction.
+ * Please note that its not complete, it either needs a "/changelog"
+ * appended (for the packages.debian.org/changelogs site) or a
+ * ".changelog" (for third party sites that store the changelog in the
+ * pool/ next to the deb itself)
+ * Example return: "pool/main/a/apt/apt_0.8.8ubuntu3"
+ */
+string GetChangelogPath(CacheFile &Cache,
+ pkgCache::PkgIterator Pkg,
+ pkgCache::VerIterator Ver)
+{
+ string path;
+
+ pkgRecords Recs(Cache);
+ pkgRecords::Parser &rec=Recs.Lookup(Ver.FileList());
+ string srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
+ string ver = Ver.VerStr();
+ // if there is a source version it always wins
+ if (rec.SourceVer() != "")
+ ver = rec.SourceVer();
+ path = flNotFile(rec.FileName());
+ path += srcpkg + "_" + StripEpoch(ver);
+ return path;
+}
+ /*}}}*/
+// GuessThirdPartyChangelogUri - return url /*{{{*/
+// ---------------------------------------------------------------------
+/* Contruct a changelog file path for third party sites that do not use
+ * packages.debian.org/changelogs
+ * This simply uses the ArchiveURI() of the source pkg and looks for
+ * a .changelog file there, Example for "mediabuntu":
+ * apt-get changelog mplayer-doc:
+ * http://packages.medibuntu.org/pool/non-free/m/mplayer/mplayer_1.0~rc4~try1.dsfg1-1ubuntu1+medibuntu1.changelog
+ */
+bool GuessThirdPartyChangelogUri(CacheFile &Cache,
+ pkgCache::PkgIterator Pkg,
+ pkgCache::VerIterator Ver,
+ string &out_uri)
+{
+ // get the binary deb server path
+ pkgCache::VerFileIterator Vf = Ver.FileList();
+ if (Vf.end() == true)
+ return false;
+ pkgCache::PkgFileIterator F = Vf.File();
+ pkgIndexFile *index;
+ pkgSourceList *SrcList = Cache.GetSourceList();
+ if(SrcList->FindIndex(F, index) == false)
+ return false;
+
+ // get archive uri for the binary deb
+ string path_without_dot_changelog = GetChangelogPath(Cache, Pkg, Ver);
+ out_uri = index->ArchiveURI(path_without_dot_changelog + ".changelog");
+
+ // now strip away the filename and add srcpkg_srcver.changelog
+ return true;
+}
+ /*}}}*/
+// DownloadChangelog - Download the changelog /*{{{*/
+// ---------------------------------------------------------------------
+bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
+ pkgCache::VerIterator Ver, string targetfile)
+/* Download a changelog file for the given package version to
+ * targetfile. This will first try the server from Apt::Changelogs::Server
+ * (http://packages.debian.org/changelogs by default) and if that gives
+ * a 404 tries to get it from the archive directly (see
+ * GuessThirdPartyChangelogUri for details how)
+ */
+{
+ string path;
+ string descr;
+ string server;
+ string changelog_uri;
+
+ // data structures we need
+ pkgCache::PkgIterator Pkg = Ver.ParentPkg();
+
+ // make the server root configurable
+ server = _config->Find("Apt::Changelogs::Server",
+ "http://packages.debian.org/changelogs");
+ path = GetChangelogPath(CacheFile, Pkg, Ver);
+ strprintf(changelog_uri, "%s/%s/changelog", server.c_str(), path.c_str());
+ if (_config->FindB("APT::Get::Print-URIs", false) == true)
+ {
+ std::cout << '\'' << changelog_uri << '\'' << std::endl;
+ return true;
+ }
+
+ strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), changelog_uri.c_str());
+ // queue it
+ new pkgAcqFile(&Fetcher, changelog_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
+
+ // try downloading it, if that fails, try third-party-changelogs location
+ // FIXME: Fetcher.Run() is "Continue" even if I get a 404?!?
+ Fetcher.Run();
+ if (!FileExists(targetfile))
+ {
+ string third_party_uri;
+ if (GuessThirdPartyChangelogUri(CacheFile, Pkg, Ver, third_party_uri))
+ {
+ strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), third_party_uri.c_str());
+ new pkgAcqFile(&Fetcher, third_party_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
+ Fetcher.Run();
+ }
+ }
+
+ if (FileExists(targetfile))
+ return true;
+
+ // error
+ return _error->Error("changelog download failed");
+}
+ /*}}}*/
+// DisplayFileInPager - Display File with pager /*{{{*/
+void DisplayFileInPager(string filename)
+{
+ pid_t Process = ExecFork();
+ if (Process == 0)
+ {
+ const char *Args[3];
+ Args[0] = "/usr/bin/sensible-pager";
+ Args[1] = filename.c_str();
+ Args[2] = 0;
+ execvp(Args[0],(char **)Args);
+ exit(100);
+ }
+
+ // Wait for the subprocess
+ ExecWait(Process, "sensible-pager", false);
+}
+ /*}}}*/
+// DoChangelog - Get changelog from the command line /*{{{*/
+// ---------------------------------------------------------------------
+bool DoChangelog(CommandLine &CmdL)
+{
+ CacheFile Cache;
+ if (Cache.ReadOnlyOpen() == false)
+ return false;
+
+ APT::CacheSetHelper helper(c0out);
+ APT::VersionSet verset = APT::VersionSet::FromCommandLine(Cache,
+ CmdL.FileList + 1, APT::VersionSet::CANDIDATE, helper);
+ if (verset.empty() == true)
+ return false;
+ pkgAcquire Fetcher;
+
+ if (_config->FindB("APT::Get::Print-URIs", false) == true)
+ for (APT::VersionSet::const_iterator Ver = verset.begin();
+ Ver != verset.end(); ++Ver)
+ return DownloadChangelog(Cache, Fetcher, Ver, "");
+
+ AcqTextStatus Stat(ScreenWidth, _config->FindI("quiet",0));
+ Fetcher.Setup(&Stat);
+
+ bool const downOnly = _config->FindB("APT::Get::Download-Only", false);
+
+ char tmpname[100];
+ char* tmpdir = NULL;
+ if (downOnly == false)
+ {
+ const char* const tmpDir = getenv("TMPDIR");
+ if (tmpDir != NULL && *tmpDir != '\0')
+ snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX", tmpDir);
+ else
+ strncpy(tmpname, "/tmp/apt-changelog-XXXXXX", sizeof(tmpname));
+ tmpdir = mkdtemp(tmpname);
+ if (tmpdir == NULL)
+ return _error->Errno("mkdtemp", "mkdtemp failed");
+ }
+
+ for (APT::VersionSet::const_iterator Ver = verset.begin();
+ Ver != verset.end();
+ ++Ver)
+ {
+ string changelogfile;
+ if (downOnly == false)
+ changelogfile.append(tmpname).append("changelog");
+ else
+ changelogfile.append(Ver.ParentPkg().Name()).append(".changelog");
+ if (DownloadChangelog(Cache, Fetcher, Ver, changelogfile) && downOnly == false)
+ {
+ DisplayFileInPager(changelogfile);
+ // cleanup temp file
+ unlink(changelogfile.c_str());
+ }
+ }
+ // clenaup tmp dir
+ if (tmpdir != NULL)
+ rmdir(tmpdir);
+ return true;
+}
+ /*}}}*/
projects / apt.git / blobdiff