New remove option : -u / --unneeded (FS#6505).

With --unneeded option 'pacman -R' doesn't stop in case of dependency error;
it removes the needed-dependency targets from the target-list instead.  See
also: http://archlinux.org/pipermail/pacman-dev/2007-October/009653.html .

The patch also adds a new causingpkg field to pmdepmissing_t which indicates
the to-be-removed package which would cause a dependency break. This is
needed, because miss->depend.name may be a provision. miss->causingpkg will
be useful in -R dependency error messages too.

[Xavier: renamed inducer to causingpkg, removed the _alpm_pkgname_pkg_cmp
helper function as requested by Aaron. This might be added by a further
commit.  Other small cleanups, updated manpage and bash completion.]

Signed-off-by: Chantry Xavier <shiningxc@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 027b1fee..bcc344d8 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -281,7 +281,8 @@ typedef enum _pmtransflag_t {
 	PM_TRANS_FLAG_NOCONFLICTS = 0x800,
 	PM_TRANS_FLAG_PRINTURIS = 0x1000,
 	PM_TRANS_FLAG_NEEDED = 0x2000,
-	PM_TRANS_FLAG_ALLEXPLICIT = 0x4000
+	PM_TRANS_FLAG_ALLEXPLICIT = 0x4000,
+	PM_TRANS_FLAG_UNNEEDED = 0x8000
 } pmtransflag_t;
 
 /* Transaction Events */
@@ -378,6 +379,7 @@ alpm_list_t *alpm_deptest(pmdb_t *db, alpm_list_t *targets);
 
 const char *alpm_miss_get_target(const pmdepmissing_t *miss);
 pmdepend_t *alpm_miss_get_dep(pmdepmissing_t *miss);
+const char *alpm_miss_get_causingpkg(const pmdepmissing_t *miss);
 
 alpm_list_t *alpm_checkdbconflicts(pmdb_t *db_local);