Introduce APT::Install::Pre-Invoke / Post-Invoke-Success

These will run in our frontends currently, and can show
messages. For the sake of keeping the implementation
complexity low, a non-success variant of Post-Invoke
is not provided.

LP: #1815761
(cherry picked from commit 3f3cad74c2abbe3837fa98030c703dd4f5f191dc)

1 files changed, 6 insertions, 1 deletions

diff --git a/apt-private/private-install.cc b/apt-private/private-install.cc
index 4e888a9bd..6094c4f93 100644
--- a/apt-private/private-install.cc
+++ b/apt-private/private-install.cc
@@ -103,6 +103,8 @@ static void RemoveDownloadNeedingItemsFromFetcher(pkgAcquire &Fetcher, bool &Tra
 }
 bool InstallPackages(CacheFile &Cache,bool ShwKept,bool Ask, bool Safety)
 {
+   if (not RunScripts("APT::Install::Pre-Invoke"))
+      return false;
    if (_config->FindB("APT::Get::Purge", false) == true)
       for (pkgCache::PkgIterator I = Cache->PkgBegin(); I.end() == false; ++I)
 	 if (Cache[I].Delete() == true && Cache[I].Purge() == false)
@@ -178,7 +180,7 @@ bool InstallPackages(CacheFile &Cache,bool ShwKept,bool Ask, bool Safety)
 
    if (Cache->DelCount() == 0 && Cache->InstCount() == 0 &&
        Cache->BadCount() == 0)
-      return true;
+      return RunScripts("APT::Install::Post-Invoke-Success");
 
    // No remove flag
    if (Cache->DelCount() != 0 && _config->FindB("APT::Get::Remove",true) == false)
@@ -392,6 +394,9 @@ bool InstallPackages(CacheFile &Cache,bool ShwKept,bool Ask, bool Safety)
       }
    }
 
+   if (not RunScripts("APT::Install::Post-Invoke-Success"))
+      return false;
+
    return true;
 }
 									/*}}}*/