Use sync.c for upgrade transaction prepare and commit

This patch utilizes the power of sync.c to fix FS#3492 and FS#5798.
Now an upgrade transaction is just a sync transaction internally (in alpm),
so all sync features are available with -U as well:
* conflict resolving
* sync dependencies from sync repos
* remove unresolvable targets

See http://www.archlinux.org/pipermail/pacman-dev/2009-June/008725.html
for the concept.

We use "mixed" target list, where PKG_FROM_FILE origin indicates local
package file, PKG_FROM_CACHE indicates sync package. The front-end can add
only one type of packages (depending on transaction type) atm, but if alpm
resolves dependencies for -U, we may get a real mixed trans->packages list.

_alpm_pkg_free_trans() was modified so that it can handle both target types
_alpm_add_prepare() was removed, we use _alpm_sync_prepare() instead
_alpm_add_commit() was renamed to _alpm_upgrade_targets()

sync.c (and deps.c) was modified slightly to handle mixed target lists,
the modifications are straightforward. There is one notable change here: We
don't create new upgrade trans in sync.c, we replace the pkgcache entries
with the loaded package files in the target list (this is a bit hackish) and
call _alpm_upgrade_targets(). This implies a TODO (pkg->origin_data.db is
not accessible anymore), but it doesn't hurt anything with pacman front-end,
so it will be fixed later (otherwise this patch would be huge).

I updated the documentation of -U and I added a new pactest, upgrade090.py,
to test the syncdeps feature of -U.

Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Dan McGee <dan@archlinux.org>

3 files changed, 33 insertions, 7 deletions

diff --git a/pactest/tests/depconflict110.py b/pactest/tests/depconflict110.py
index fd56fa89..82e17d0b 100644
--- a/pactest/tests/depconflict110.py
+++ b/pactest/tests/depconflict110.py
@@ -7,7 +7,7 @@ self.addpkg(p);
 lp = pmpkg("pkg2", "1.0-1")
 self.addpkg2db("local", lp)
 
-self.args = "-U %s" % p.filename()
-self.addrule("PACMAN_RETCODE=1")
-self.addrule("!PKG_EXIST=pkg1")
-self.addrule("PKG_EXIST=pkg2")
+self.args = "-U %s --ask=4" % p.filename()
+self.addrule("PACMAN_RETCODE=0")
+self.addrule("PKG_EXIST=pkg1")
+self.addrule("!PKG_EXIST=pkg2")
diff --git a/pactest/tests/upgrade051.py b/pactest/tests/upgrade051.py
index 4346c24d..1d173218 100644
--- a/pactest/tests/upgrade051.py
+++ b/pactest/tests/upgrade051.py
@@ -8,10 +8,8 @@ p.conflicts = ["pkg1"]
 p.provides = ["pkg1"]
 self.addpkg(p)
 
-self.args = "-U %s" % p.filename()
+self.args = "-U %s --ask=4" % p.filename()
 
 self.addrule("PACMAN_RETCODE=0")
 self.addrule("!PKG_EXIST=pkg1")
 self.addrule("PKG_EXIST=pkg2")
-
-self.expectfailure = True
diff --git a/pactest/tests/upgrade090.py b/pactest/tests/upgrade090.py
new file mode 100644
index 00000000..26e531c9
--- /dev/null
+++ b/pactest/tests/upgrade090.py
@@ -0,0 +1,28 @@
+self.description = "-U syncdeps test"
+
+p1 = pmpkg("pkg1", "1.0-2")
+p1.files = ["bin/pkg1"]
+
+p2 = pmpkg("pkg2", "1.0-2")
+p2.depends = ["dep"]
+
+p3 = pmpkg("pkg3", "1.0-2")
+p3.depends = ["unres"]
+
+for p in p1, p2, p3:
+	self.addpkg(p)
+
+sp = pmpkg("dep")
+sp.files = ["bin/dep"]
+self.addpkg2db("sync", sp)
+
+self.args = "-U %s --ask=32" % " ".join([p.filename() for p in p1, p2, p3])
+
+self.addrule("PACMAN_RETCODE=0")
+for p in p1, p2, sp:
+	self.addrule("PKG_EXIST=%s" % p.name)
+	for f in p.files:
+		self.addrule("FILE_EXIST=%s" % f)
+self.addrule("PKG_VERSION=pkg1|1.0-2")
+self.addrule("PKG_VERSION=pkg2|1.0-2")
+self.addrule("!PKG_EXIST=pkg3")