Much like packages that require a give package are displayed in the "Required by" field of its information output, alos display packages that optionally require the package. Inspired-by: Benedikt Morbach <benedikt.morbach@googlemail.com> Signed-off-by: Allan McRae <allan@archlinux.org> --- Example output:

./src/pacman/pacman -Qi tk Name : tk ... Required By : None Optional For : git python python2 r

lib/libalpm/alpm.h | 8 ++++++++ lib/libalpm/package.c | 34 +++++++++++++++++++++++++++------- src/pacman/package.c | 4 +++- 3 files changed, 38 insertions(+), 8 deletions(-) diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h index f8928b9..5b4eb6d 100644 --- a/lib/libalpm/alpm.h +++ b/lib/libalpm/alpm.h @@ -721,6 +721,14 @@ int alpm_pkg_vercmp(const char *a, const char *b); */ alpm_list_t *alpm_pkg_compute_requiredby(alpm_pkg_t *pkg); +/** Computes the list of packages optionally requiring a given package. + * The return value of this function is a newly allocated + * list of package names (char*), it should be freed by the caller. + * @param pkg a package + * @return the list of packages optionally requiring pkg + */ +alpm_list_t *alpm_pkg_compute_optionalfor(alpm_pkg_t *pkg); + /** @name Package Property Accessors * Any pointer returned by these functions points to internal structures * allocated by libalpm. They should not be freed nor modified in any diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c index 4887e21..f3e0b7f 100644 --- a/lib/libalpm/package.c +++ b/lib/libalpm/package.c @@ -389,7 +389,8 @@ int SYMEXPORT alpm_pkg_has_scriptlet(alpm_pkg_t *pkg) return pkg->ops->has_scriptlet(pkg); } -static void find_requiredby(alpm_pkg_t *pkg, alpm_db_t *db, alpm_list_t **reqs) +static void find_requiredby(alpm_pkg_t *pkg, alpm_db_t *db, alpm_list_t **reqs, + int optional) { const alpm_list_t *i; pkg->handle->pm_errno = 0; @@ -397,7 +398,14 @@ static void find_requiredby(alpm_pkg_t *pkg, alpm_db_t *db, alpm_list_t **reqs) for(i = _alpm_db_get_pkgcache(db); i; i = i->next) { alpm_pkg_t *cachepkg = i->data; alpm_list_t *j; - for(j = alpm_pkg_get_depends(cachepkg); j; j = j->next) { + + if(optional == 0) { + j = alpm_pkg_get_depends(cachepkg); + } else { + j = alpm_pkg_get_optdepends(cachepkg); + } + + for(; j; j = j->next) { if(_alpm_depcmp(pkg, j->data)) { const char *cachepkgname = cachepkg->name; if(alpm_list_find_str(*reqs, cachepkgname) == NULL) { @@ -408,8 +416,7 @@ static void find_requiredby(alpm_pkg_t *pkg, alpm_db_t *db, alpm_list_t **reqs) } } -/** Compute the packages requiring a given package. */ -alpm_list_t SYMEXPORT *alpm_pkg_compute_requiredby(alpm_pkg_t *pkg) +static alpm_list_t *compute_requiredby(alpm_pkg_t *pkg, int optional) { const alpm_list_t *i; alpm_list_t *reqs = NULL; @@ -420,17 +427,17 @@ alpm_list_t SYMEXPORT *alpm_pkg_compute_requiredby(alpm_pkg_t *pkg) if(pkg->origin == ALPM_PKG_FROM_FILE) { /* The sane option; search locally for things that require this. */ - find_requiredby(pkg, pkg->handle->db_local, &reqs); + find_requiredby(pkg, pkg->handle->db_local, &reqs, optional); } else { /* We have a DB package. if it is a local package, then we should * only search the local DB; else search all known sync databases. */ db = pkg->origin_data.db; if(db->status & DB_STATUS_LOCAL) { - find_requiredby(pkg, db, &reqs); + find_requiredby(pkg, db, &reqs, optional); } else { for(i = pkg->handle->dbs_sync; i; i = i->next) { db = i->data; - find_requiredby(pkg, db, &reqs); + find_requiredby(pkg, db, &reqs, optional); } reqs = alpm_list_msort(reqs, alpm_list_count(reqs), _alpm_str_cmp); } @@ -438,6 +445,19 @@ alpm_list_t SYMEXPORT *alpm_pkg_compute_requiredby(alpm_pkg_t *pkg) return reqs; } +/** Compute the packages requiring a given package. */ +alpm_list_t SYMEXPORT *alpm_pkg_compute_requiredby(alpm_pkg_t *pkg) +{ + return compute_requiredby(pkg, 0); +} + +/** Compute the packages optionally requiring a given package. */ +alpm_list_t SYMEXPORT *alpm_pkg_compute_optionalfor(alpm_pkg_t *pkg) +{ + return compute_requiredby(pkg, 1); +} + + /** @} */ alpm_file_t *_alpm_file_copy(alpm_file_t *dest, diff --git a/src/pacman/package.c b/src/pacman/package.c index ce7de7f..a8f322c 100644 --- a/src/pacman/package.c +++ b/src/pacman/package.c @@ -89,7 +89,7 @@ void dump_pkg_full(alpm_pkg_t *pkg, int extra) double size; char bdatestr[50] = "", idatestr[50] = ""; const char *label, *reason; - alpm_list_t *validation = NULL, *requiredby = NULL; + alpm_list_t *validation = NULL, *requiredby = NULL, *optionalfor = NULL; from = alpm_pkg_get_origin(pkg); @@ -137,6 +137,7 @@ void dump_pkg_full(alpm_pkg_t *pkg, int extra) if(extra || from == ALPM_PKG_FROM_LOCALDB) { /* compute this here so we don't get a pause in the middle of output */ requiredby = alpm_pkg_compute_requiredby(pkg); + optionalfor = alpm_pkg_compute_optionalfor(pkg); } cols = getcols(fileno(stdout)); @@ -159,6 +160,7 @@ void dump_pkg_full(alpm_pkg_t *pkg, int extra) if(extra || from == ALPM_PKG_FROM_LOCALDB) { list_display(_("Required By :"), requiredby, cols); + list_display(_("Optional For :"), optionalfor, cols); } deplist_display(_("Conflicts With :"), alpm_pkg_get_conflicts(pkg), cols); deplist_display(_("Replaces :"), alpm_pkg_get_replaces(pkg), cols); -- 1.7.11.4