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skip conflicts resolved by file replacement

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When replacing a file with a directory, any files inside the new
directory cannot possibly exist on the filesystem and can be skipped.
This allows cross-package symlink-to-directory transitions when there
are files with the same name under both the symlinked directory and the
new directory.

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>
This commit is contained in:
Andrew Gregory 2015-12-04 14:14:32 -05:00 committed by Allan McRae
parent bb5e6c3b76
commit 4838d250e5
2 changed files with 15 additions and 2 deletions
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15
lib/libalpm/conflict.c
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@ -566,6 +566,8 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle,
/* localp2->files will be removed (target conflicts are handled by CHECK 1) */
if(localp2 && alpm_filelist_contains(alpm_pkg_get_files(localp2), relative_path)) {
size_t fslen = strlen(filestr);
/* skip removal of file, but not add. this will prevent a second
* package from removing the file when it was already installed
* by its new owner (whether the file is in backup array or not */
@ -574,6 +576,19 @@ alpm_list_t *_alpm_db_find_fileconflicts(alpm_handle_t *handle,
_alpm_log(handle, ALPM_LOG_DEBUG,
"file changed packages, adding to remove skiplist\n");
resolved_conflict = 1;
if(filestr[fslen - 1] == '/') {
/* replacing a file with a directory:
* go ahead and skip any files inside filestr as they will
* necessarily be resolved by replacing the file with a dir
* NOTE: afterward, j will point to the last file inside filestr */
for( ; j->next; j = j->next) {
const char *filestr2 = j->next->data;
if(strncmp(filestr, filestr2, fslen) != 0) {
break;
}
}
}
}
}

2
test/pacman/tests/symlink021.py
View File

@ -24,5 +24,3 @@ self.addrule("FILE_TYPE=usr/include/foo|dir")
self.addrule("!FILE_TYPE=usr/include/bar|link")
self.addrule("FILE_EXIST=usr/include/foo/header.h")
self.addrule("FILE_EXIST=usr/include/bar/header.h")
self.expectfailure = True