libalpm: Add accessors for the base field

This commit adds the necessary accessor functions to get the PKGBASE of
a package, forcing the desc file to be parsed.

Signed-off-by: Johannes Löthberg <johannes@kyriasis.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

lib/libalpm/alpm.h

@@ -1101,6 +1101,12 @@ int alpm_pkg_should_ignore(alpm_handle_t *handle, alpm_pkg_t *pkg);
  */
 const char *alpm_pkg_get_filename(alpm_pkg_t *pkg);
 
+/** Returns the package base name.
+ * @param pkg a pointer to package
+ * @return a reference to an internal string
+ */
+const char *alpm_pkg_get_base(alpm_pkg_t *pkg);
+
 /** Returns the package name.
  * @param pkg a pointer to package
  * @return a reference to an internal string

lib/libalpm/be_local.c

@@ -63,6 +63,12 @@ static int local_db_read(alpm_pkg_t *info, alpm_dbinfrq_t inforeq);
  * initialized.
  */
 
+static const char *_cache_get_base(alpm_pkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->base;
+}
+
 static const char *_cache_get_desc(alpm_pkg_t *pkg)
 {
 	LAZY_LOAD(INFRQ_DESC, NULL);
@@ -297,6 +303,7 @@ static int _cache_force_load(alpm_pkg_t *pkg)
  * logic.
  */
 static struct pkg_operations local_pkg_ops = {
+	.get_base        = _cache_get_base,
 	.get_desc        = _cache_get_desc,
 	.get_url         = _cache_get_url,
 	.get_builddate   = _cache_get_builddate,

lib/libalpm/package.c

@@ -83,6 +83,7 @@ int SYMEXPORT alpm_pkg_checkmd5sum(alpm_pkg_t *pkg)
  * backend logic that needs lazy access, such as the local database through
  * a lazy-load cache. However, the defaults will work just fine for fully-
  * populated package structures. */
+static const char *_pkg_get_base(alpm_pkg_t *pkg)        { return pkg->base; }
 static const char *_pkg_get_desc(alpm_pkg_t *pkg)        { return pkg->desc; }
 static const char *_pkg_get_url(alpm_pkg_t *pkg)         { return pkg->url; }
 static alpm_time_t _pkg_get_builddate(alpm_pkg_t *pkg)   { return pkg->builddate; }
@@ -144,6 +145,7 @@ static int _pkg_force_load(alpm_pkg_t UNUSED *pkg) { return 0; }
  * struct itself with no abstraction layer or any type of lazy loading.
  */
 struct pkg_operations default_pkg_ops = {
+	.get_base        = _pkg_get_base,
 	.get_desc        = _pkg_get_desc,
 	.get_url         = _pkg_get_url,
 	.get_builddate   = _pkg_get_builddate,
@@ -186,6 +188,13 @@ const char SYMEXPORT *alpm_pkg_get_filename(alpm_pkg_t *pkg)
 	return pkg->filename;
 }
 
+const char SYMEXPORT *alpm_pkg_get_base(alpm_pkg_t *pkg)
+{
+	ASSERT(pkg != NULL, return NULL);
+	pkg->handle->pm_errno = 0;
+	return pkg->ops->get_base(pkg);
+}
+
 const char SYMEXPORT *alpm_pkg_get_name(alpm_pkg_t *pkg)
 {
 	ASSERT(pkg != NULL, return NULL);

lib/libalpm/package.h

@@ -43,6 +43,7 @@
  * defined default_pkg_ops struct to work just fine for their needs.
  */
 struct pkg_operations {
+	const char *(*get_base) (alpm_pkg_t *);
 	const char *(*get_desc) (alpm_pkg_t *);
 	const char *(*get_url) (alpm_pkg_t *);
 	alpm_time_t (*get_builddate) (alpm_pkg_t *);