Attachment 17142 Details for Bug 51975 – Implementation of 'apt-get changelog'

[patch] Implementation of 'apt-get changelog'

apt-get-changelog.patch (text/plain), 3.74 KB, created by Alexey Shabalin on 2024-11-07 13:47:09 MSK

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Creator: Alexey Shabalin

Created: 2024-11-07 13:47:09 MSK

Size: 3.74 KB

patch

obsolete

>From 203f3d1c9bb590a47a57a2a0d6c0bb434b02cad7 Mon Sep 17 00:00:00 2001
>From: Sergey Konev <konevsa@basealt.ru>
>Date: Fri, 1 Nov 2024 18:27:05 +0300
>Subject: [PATCH] Implementation of 'apt-get changelog'
>
>The code is based on ALT's 'apt-cache show' (see cmdline/apt-cache.cc).
>Virtual packages handling is taken from 'show' implementation.
>Utility takes changelog from Candidate version (i.e. the most recent).
>'rpmRecordParser' is used to extract Changelog.
>
>Usage example:
> ```
>    $ apt-get changelog gcc htop
> ```
> Will display changelog of 'gcc' and 'htop' packages
>---
> cmdline/apt-get.cc | 76 ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 76 insertions(+)
>
>diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
>index 77f21fdf..7735c505 100644
>--- a/cmdline/apt-get.cc
>+++ b/cmdline/apt-get.cc
>@@ -2091,6 +2091,80 @@ bool DoSource(CommandLine &CmdL)
> 
>    return true;
> }
>+
>+void DisplayChangelog(CacheFile& Cache, pkgCache::VerIterator V) {
>+   pkgCache::VerFileIterator Vf = V.FileList();
>+   for (; Vf.end() == false; Vf++)
>+     if ((Vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
>+       break;
>+
>+   if (Vf.end() == true)
>+     Vf = V.FileList();
>+
>+   pkgRecords Recs(*Cache);
>+   pkgRecords::Parser &P = Recs.Lookup(Vf);
>+
>+   std::cout << "Changelog for " << P.Name() << ":\n";
>+   std::cout << P.Changelog() << "\n";
>+}
>+
>+bool DoChangelog(CommandLine &CmdL) {
>+   // Implementation is very similar to apt-cache show
>+   CacheFile Cache(devnull, false /* not WithLock */);
>+   if (Cache.Open() == false)
>+     return false;
>+
>+   if (CmdL.FileSize() <= 1)
>+     return _error->Error(_("Must specify at least one package to get changelog for"));
>+
>+   pkgDepCache::Policy Plcy;
>+
>+   unsigned int found = 0;
>+
>+   for (const char **I = CmdL.FileList + 1; *I != 0; ++I) {
>+    pkgCache::PkgIterator Pkg = Cache->FindPkg(*I);
>+    if (Pkg.end() == true) {
>+      _error->Warning(_("Unable to locate package %s"), *I);
>+      continue;
>+    }
>+
>+    ++found;
>+
>+    // If it's a virtual package, require user to select
>+    if (Pkg.VersionList().end() == true and Pkg->ProvidesList != 0) {
>+      ioprintf(cout, _("Package %s is a virtual package provided by:\n"),
>+               Pkg.Name());
>+      for (pkgCache::PrvIterator Prv = Pkg.ProvidesList(); Prv.end() == false;
>+           Prv++) {
>+        pkgCache::VerIterator V = Plcy.GetCandidateVer(Prv.OwnerPkg());
>+        if (V.end() == true)
>+          continue;
>+        if (V != Prv.OwnerVer())
>+          continue;
>+        cout << "  " << Prv.OwnerPkg().Name() << " " << V.VerStr() << endl;
>+      }
>+
>+      _error->Error(
>+          _("Package %s is a virtual package with multiple providers."),
>+          Pkg.Name());
>+      return false;
>+    }
>+
>+   // Find the proper version to use.
>+   pkgCache::VerIterator V = Plcy.GetCandidateVer(Pkg);
>+
>+   if (V.end() == true || V.FileList().end() == true)
>+     continue;
>+
>+   DisplayChangelog(Cache, V);
>+  }
>+
>+  if (found > 0)
>+    return true;
>+  return _error->Error(_("No packages found"));
>+
>+}
>+
> 									/*}}}*/
> // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
> // ---------------------------------------------------------------------
>@@ -2518,6 +2592,7 @@ bool ShowHelp(CommandLine &CmdL)
>       "   clean - Erase downloaded archive files\n"
>       "   autoclean - Erase old downloaded archive files\n"
>       "   check - Verify that there are no broken dependencies\n"
>+      "   changelog - Display the changelog for the given package\n"
> // CNC:2003-03-16
>       );
> #ifdef WITH_LUA
>@@ -2648,6 +2723,7 @@ int main(int argc,const char *argv[])
> 				   {"source",&DoSource},
> 				   {"moo",&DoMoo},
> 				   {"autoremove", &DoAutoremove},
>+				   {"changelog",&DoChangelog},
> 				   {"help",&ShowHelp},
> // CNC:2003-03-19
> #ifdef WITH_LUA

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Attachments on bug 51975: 17142