From: Bryan Ischo <[email protected]>

This fixes a bug introduced by my previous changes which changes the
behavior of IgnorePkg/IgnoreGroup to allow the user to remove unresolvable
packages from the transaction.  The bug is that the target-list was no
longer being consulted first to resolve dependencies, which means that if
two packages in the sync database satisfied a dependency, and the user
explicitly requested one of those two packages in the sync, the other
package was still being pulled in.

A new test was added, sync993.py, to verify the desired behavior.

Signed-off-by: Bryan Ischo <[email protected]>
---
 lib/libalpm/deps.c       |   20 ++++++++++++--------
 lib/libalpm/deps.h       |    3 ++-
 lib/libalpm/sync.c       |    7 ++++---
 pactest/tests/sync993.py |   20 ++++++++++++++++++++
 4 files changed, 38 insertions(+), 12 deletions(-)
 create mode 100644 pactest/tests/sync993.py

diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index 694e5be..0faa221 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -582,8 +582,8 @@ pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs,
  *         unmodified by this function
  */
 int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *pkg,
-                      alpm_list_t **packages, alpm_list_t *remove,
-                      alpm_list_t **data)
+                      alpm_list_t *preferred, alpm_list_t **packages,
+                      alpm_list_t *remove, alpm_list_t **data)
 {
        alpm_list_t *i, *j;
        alpm_list_t *targ;
@@ -620,17 +620,21 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t 
*dbs_sync, pmpkg_t *pkg,
                        if(_alpm_find_dep_satisfier(*packages, missdep)) {
                                continue;
                        }
-                       /* find a satisfier package in the given repositories */
-                       pmpkg_t *spkg = _alpm_resolvedep(missdep, dbs_sync, 
*packages, 0);
+                       /* check if one of the packages in the [preferred] list 
already satisfies this dependency */
+                       pmpkg_t *spkg = _alpm_find_dep_satisfier(preferred, 
missdep);
+                       if(!spkg) {
+                               /* find a satisfier package in the given 
repositories */
+                               spkg = _alpm_resolvedep(missdep, dbs_sync, 
*packages, 0);
+                       }
                        if(!spkg) {
                                pm_errno = PM_ERR_UNSATISFIED_DEPS;
                                char *missdepstring = 
alpm_dep_compute_string(missdep);
                                _alpm_log(PM_LOG_WARNING, _("cannot resolve 
\"%s\", a dependency of \"%s\"\n"),
-                                                      missdepstring, 
tpkg->name);
+                                               missdepstring, tpkg->name);
                                free(missdepstring);
                                if(data) {
                                        pmdepmissing_t *missd = 
_alpm_depmiss_new(miss->target,
-                                                                  
miss->depend, miss->causingpkg);
+                                                       miss->depend, 
miss->causingpkg);
                                        if(missd) {
                                                *data = alpm_list_add(*data, 
missd);
                                        }
@@ -640,9 +644,9 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, 
pmpkg_t *pkg,
                                alpm_list_free_inner(deps, 
(alpm_list_fn_free)_alpm_depmiss_free);
                                alpm_list_free(deps);
                                return(-1);
-                       }  else {
+                       } else {
                                _alpm_log(PM_LOG_DEBUG, "pulling dependency %s 
(needed by %s)\n",
-                                         alpm_pkg_get_name(spkg), 
alpm_pkg_get_name(tpkg));
+                                               alpm_pkg_get_name(spkg), 
alpm_pkg_get_name(tpkg));
                                *packages = alpm_list_add(*packages, spkg);
                        }
                }
diff --git a/lib/libalpm/deps.h b/lib/libalpm/deps.h
index eb1400b..94847d8 100644
--- a/lib/libalpm/deps.h
+++ b/lib/libalpm/deps.h
@@ -49,7 +49,8 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, int 
reverse);
 void _alpm_recursedeps(pmdb_t *db, alpm_list_t *targs, int include_explicit);
 pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs, alpm_list_t 
*excluding, int prompt);
 int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *pkg,
-                     alpm_list_t **packages, alpm_list_t *remove, alpm_list_t 
**data);
+               alpm_list_t *preferred, alpm_list_t **packages, alpm_list_t 
*remove,
+               alpm_list_t **data);
 int _alpm_dep_edge(pmpkg_t *pkg1, pmpkg_t *pkg2);
 pmdepend_t *_alpm_splitdep(const char *depstring);
 pmpkg_t *_alpm_find_dep_satisfier(alpm_list_t *pkgs, pmdepend_t *dep);
diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c
index fca96d8..b504a42 100644
--- a/lib/libalpm/sync.c
+++ b/lib/libalpm/sync.c
@@ -396,7 +396,7 @@ static int compute_download_size(pmpkg_t *newpkg)
 
 int _alpm_sync_prepare(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t 
*dbs_sync, alpm_list_t **data)
 {
-       alpm_list_t *deps = NULL;
+       alpm_list_t *deps = NULL, *preferred = NULL;
        alpm_list_t *list = NULL, *remove = NULL; /* allow checkdeps usage with 
trans->packages */
        alpm_list_t *unresolvable = NULL;
        alpm_list_t *i, *j;
@@ -422,19 +422,20 @@ int _alpm_sync_prepare(pmtrans_t *trans, pmdb_t 
*db_local, alpm_list_t *dbs_sync
                EVENT(trans, PM_TRANS_EVT_RESOLVEDEPS_START, NULL, NULL);
                _alpm_log(PM_LOG_DEBUG, "resolving target's dependencies\n");
 
-               /* build remove list for resolvedeps */
+               /* build remove list and preferred list for resolvedeps */
                for(i = trans->packages; i; i = i->next) {
                        pmsyncpkg_t *sync = i->data;
                        for(j = sync->removes; j; j = j->next) {
                                remove = alpm_list_add(remove, j->data);
                        }
+                       preferred = alpm_list_add(preferred, sync->pkg);
                }
 
                /* Resolve packages in the transaction one at a time, in addtion
                   building up a list of packages which could not be resolved. 
*/
                for(i = trans->packages; i; i = i->next) {
                        pmpkg_t *pkg = ((pmsyncpkg_t *) i->data)->pkg;
-                       if(_alpm_resolvedeps(db_local, dbs_sync, pkg, &list, 
remove, data) == -1) {
+                       if(_alpm_resolvedeps(db_local, dbs_sync, pkg, 
preferred, &list, remove, data) == -1) {
                                unresolvable = alpm_list_add(unresolvable, pkg);
                        }
                        /* Else, [list] now additionally contains [pkg] and all 
of its
diff --git a/pactest/tests/sync993.py b/pactest/tests/sync993.py
new file mode 100644
index 0000000..82cc803
--- /dev/null
+++ b/pactest/tests/sync993.py
@@ -0,0 +1,20 @@
+self.description = "Choose a dependency satisfier (target-list vs. database)"
+
+sp1 = pmpkg("pkg1")
+sp1.depends = ["dep"]
+
+sp2 = pmpkg("pkg2")
+sp2.provides = ["dep"]
+
+sp3 = pmpkg("pkg3")
+sp3.provides = ["dep"]
+
+for p in sp1, sp2, sp3:
+        self.addpkg2db("sync", p)
+
+self.args = "-S pkg1 pkg3"
+
+self.addrule("PACMAN_RETCODE=0")
+self.addrule("PKG_EXIST=pkg1")
+self.addrule("!PKG_EXIST=pkg2")
+self.addrule("PKG_EXIST=pkg3")
-- 
1.6.1.3

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