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/deps.h b/lib/libalpm/deps.h
index fdbfebed..439a92a2 100644
--- a/lib/libalpm/deps.h
+++ b/lib/libalpm/deps.h
@@ -37,6 +37,7 @@ struct __pmdepend_t {
 struct __pmdepmissing_t {
 	char *target;
 	pmdepend_t *depend;
+	char *causingpkg; /* this is used in case of remove dependency error only */
 };
 
 /* Graphs */
@@ -51,7 +52,8 @@ struct __pmgraph_t {
 
 void _alpm_dep_free(pmdepend_t *dep);
 pmdepend_t *_alpm_dep_dup(const pmdepend_t *dep);
-pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdepend_t *dep);
+pmdepmissing_t *_alpm_depmiss_new(const char *target, pmdepend_t *dep,
+		const char *causinpkg);
 void _alpm_depmiss_free(pmdepmissing_t *miss);
 alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode);
 void _alpm_recursedeps(pmdb_t *db, alpm_list_t *targs, int include_explicit);