Resolve file paths during inter-package conflict check

File paths are resolved if necessary during inter-package conflict
checks so that packages carrying the same effective file due to
directory symlinks on the filesystem are flagged as conflicting.

Signed-off-by: Allan McRae <allan@archlinux.org>

lib/libalpm/conflict.c

@@ -361,12 +361,17 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle,
 		int percent = (current * 100) / numtargs;
 		PROGRESS(handle, ALPM_PROGRESS_CONFLICTS_START, "", percent,
 		         numtargs, current);
+
+		_alpm_filelist_resolve(handle, alpm_pkg_get_files(p1));
+
 		/* CHECK 1: check every target against every target */
 		_alpm_log(handle, ALPM_LOG_DEBUG, "searching for file conflicts: %s\n",
 				p1->name);
 		for(j = i->next; j; j = j->next) {
 			alpm_list_t *common_files;
 			alpm_pkg_t *p2 = j->data;
+			_alpm_filelist_resolve(handle, alpm_pkg_get_files(p2));
+
 			common_files = _alpm_filelist_intersection(alpm_pkg_get_files(p1),
 					alpm_pkg_get_files(p2));
 

lib/libalpm/filelist.c

@@ -268,21 +268,18 @@ alpm_list_t *_alpm_filelist_intersection(alpm_filelist_t *filesA,
 		int cmp, isdirA, isdirB;
 		char *strA, *strB;
 
-		alpm_file_t *fileA = filesA->files + ctrA;
-		alpm_file_t *fileB = filesB->files + ctrB;
-
 		isdirA = 0;
-		strA = fileA->name;
+		strA = filesA->resolved_path[ctrA];
 		if(strA[strlen(strA)-1] == '/') {
 			isdirA = 1;
-			strA = strndup(fileA->name, strlen(strA)-1);
+			strA = strndup(filesA->resolved_path[ctrA], strlen(strA)-1);
 		}
 
 		isdirB = 0;
-		strB = fileB->name;
+		strB = filesB->resolved_path[ctrB];
 		if(strB[strlen(strB)-1] == '/') {
 			isdirB = 1;
-			strB = strndup(fileB->name, strlen(strB)-1);
+			strB = strndup(filesB->resolved_path[ctrB], strlen(strB)-1);
 		}
 
 		cmp = strcmp(strA, strB);
@@ -300,7 +297,7 @@ alpm_list_t *_alpm_filelist_intersection(alpm_filelist_t *filesA,
 
 			/* when not directories, item in both qualifies as an intersect */
 			if(! (isdirA && isdirB)) {
-				ret = alpm_list_add(ret, fileA);
+				ret = alpm_list_add(ret, filesA->files + ctrA);
 			}
 			ctrA++;
 			ctrB++;

test/pacman/tests/fileconflict001.py

@@ -25,5 +25,3 @@
 self.addrule("!PKG_EXIST=pkg2")
 self.addrule("FILE_EXIST=dir/realdir/realfile")
 self.addrule("!FILE_EXIST=dir/realdir/file")
-
-self.expectfailure = True

test/pacman/tests/fileconflict016.py

@@ -22,5 +22,3 @@
 self.addrule("PACMAN_RETCODE=1")
 self.addrule("!PKG_EXIST=pkg1")
 self.addrule("!PKG_EXIST=pkg2")
-
-self.expectfailure = True

test/pacman/tests/fileconflict017.py

@@ -0,0 +1,26 @@
+self.description = "file conflict with same effective path across packages (directory symlink - deep)"
+
+lp1 = pmpkg("filesystem", "1.0-1")
+lp1.files = ["usr/",
+             "usr/lib/",
+             "lib -> usr/lib/"]
+self.addpkg2db("local", lp1)
+
+p1 = pmpkg("pkg1")
+p1.files = ["lib/",
+            "lib/foo/",
+            "lib/foo/bar"]
+self.addpkg2db("sync", p1)
+
+p2 = pmpkg("pkg2")
+p2.files = ["usr/",
+            "usr/lib/",
+            "usr/lib/foo/",
+            "usr/lib/foo/bar"]
+self.addpkg2db("sync", p2)
+
+self.args = "-S pkg1 pkg2"
+
+self.addrule("PACMAN_RETCODE=1")
+self.addrule("!PKG_EXIST=pkg1")
+self.addrule("!PKG_EXIST=pkg2")