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authorMichael Vogt <michael.vogt@ubuntu.com>2010-11-18 10:32:41 +0100
committerMichael Vogt <michael.vogt@ubuntu.com>2010-11-18 10:32:41 +0100
commit2d555a8205eccc4cb17b93f7c92b71a854e8f82e (patch)
tree560bb435bfb46f73abe61174edfffbfce1b2de85 /cmdline/apt-get.cc
parent0e3e112e3d60647e335aee7e6ce308b29fd11988 (diff)
parentd786352da27c6f05bc372a061f3a78237b69e6f4 (diff)
merged lp:~mvo/apt/apt-get-changelog
Diffstat (limited to 'cmdline/apt-get.cc')
-rw-r--r--cmdline/apt-get.cc153
1 files changed, 153 insertions, 0 deletions
diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index 116f4a07e..b645da878 100644
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -2787,6 +2787,158 @@ bool DoBuildDep(CommandLine &CmdL)
return true;
}
/*}}}*/
+// GuessThirdPartyChangelogUri - return url /*{{{*/
+// ---------------------------------------------------------------------
+bool GuessThirdPartyChangelogUri(CacheFile &Cache,
+ pkgCache::PkgIterator Pkg,
+ pkgCache::VerIterator Ver,
+ string &out_uri)
+{
+ pkgRecords Recs(Cache);
+ pkgSourceList *SrcList = Cache.GetSourceList();
+
+ // get the binary deb server path
+ pkgRecords::Parser &rec=Recs.Lookup(Ver.FileList());
+ string srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
+ // FIXME: deal with cases like gcc-defaults (srcver != binver)
+ string srcver = StripEpoch(Ver.VerStr());
+
+ pkgCache::VerFileIterator Vf = Ver.FileList();
+ if (Vf.end() == true)
+ return false;
+ pkgCache::PkgFileIterator F = Vf.File();
+ pkgIndexFile *index;
+ if(SrcList->FindIndex(F, index) == false)
+ return false;
+ // get archive uri for the binary deb
+ string deb_uri = index->ArchiveURI(rec.FileName());
+
+ // now strip away the filename and add srcpkg_srcver.changelog
+ out_uri = flNotFile(deb_uri);
+ out_uri += srcpkg + "_" + srcver + ".changelog";
+ return true;
+}
+// DownloadChangelog - Download the changelog /*{{{*/
+// ---------------------------------------------------------------------
+bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher, pkgCache::VerIterator V, string targetfile)
+{
+ string srcpkg;
+ string prefix;
+ string descr;
+ string src_section;
+ string verstr;
+ string server;
+ string path;
+
+ // data structures we need
+ pkgRecords Recs(CacheFile);
+ pkgCache::PkgIterator Pkg = V.ParentPkg();
+ pkgRecords::Parser &rec=Recs.Lookup(V.FileList());
+
+ // build uri
+ srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
+ // FIXME: we actually need the source section here
+ src_section= Pkg.Section();
+ if(src_section.find('/')!=src_section.npos)
+ src_section=string(src_section, 0, src_section.find('/'));
+ else
+ src_section="main";
+
+ prefix+=srcpkg[0];
+ if(srcpkg.size()>3 && srcpkg[0]=='l' && srcpkg[1]=='i' && srcpkg[2]=='b')
+ prefix=std::string("lib")+srcpkg[3];
+
+ verstr = V.VerStr();
+ if(verstr.find(':')!=verstr.npos)
+ verstr=string(verstr, verstr.find(':')+1);
+
+ // make the server configurable
+ server = _config->Find("Apt::Changelogs::Server",
+ "http://packages.debian.org/");
+ // ... but not the format string to avoid all possible attacks
+ strprintf(path, "/changelogs/pool/%s/%s/%s/%s_%s/changelog", src_section.c_str(), prefix.c_str(), srcpkg.c_str(), srcpkg.c_str(), verstr.c_str());
+ // queue it
+ string changelog_uri = server+path;
+ strprintf(descr, _("Changelog for %s (%s)"), srcpkg.c_str(), changelog_uri.c_str());
+ new pkgAcqFile(&Fetcher, uri, "", 0, descr, srcpkg, "ignored", targetfile);
+
+ // try downloading it, if that fails, they third-party-changelogs location
+ // FIXME: res is "Continue" even if I get a 404?!?
+ int res = Fetcher.Run();
+ if (!FileExists(targetfile))
+ {
+ string third_party_uri;
+ if (GuessThirdPartyChangelogUri(CacheFile, Pkg, V, third_party_uri))
+ {
+ strprintf(descr, _("Changelog for %s (%s)"), srcpkg.c_str(), third_party_uri.c_str());
+ new pkgAcqFile(&Fetcher, third_party_uri, "", 0, descr, srcpkg, "ignored", targetfile);
+ res = 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);
+ pkgAcquire Fetcher;
+ AcqTextStatus Stat(ScreenWidth, _config->FindI("quiet",0));
+ Fetcher.Setup(&Stat);
+
+ if (verset.empty() == true)
+ return false;
+ char *tmpdir = mkdtemp(strdup("/tmp/apt-changelog-XXXXXX"));
+ if (tmpdir == NULL) {
+ return _error->Errno("mkdtemp", "mkdtemp failed");
+ }
+
+ for (APT::VersionSet::const_iterator Ver = verset.begin();
+ Ver != verset.end();
+ ++Ver)
+ {
+ string changelogfile = string(tmpdir) + "changelog";
+ if (DownloadChangelog(Cache, Fetcher, Ver, changelogfile))
+ DisplayFileInPager(changelogfile);
+ // cleanup temp file
+ unlink(changelogfile.c_str());
+ }
+ // clenaup tmp dir
+ rmdir(tmpdir);
+ free(tmpdir);
+ return true;
+}
+ /*}}}*/
// DoMoo - Never Ask, Never Tell /*{{{*/
// ---------------------------------------------------------------------
/* */
@@ -2978,6 +3130,7 @@ int main(int argc,const char *argv[]) /*{{{*/
{"check",&DoCheck},
{"source",&DoSource},
{"download",&DoDownload},
+ {"changelog",&DoChangelog},
{"moo",&DoMoo},
{"help",&ShowHelp},
{0,0}};