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pacman
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Rework package removal code 

Extract the actual unlinking of files into a new method, which
eliminates a goto used for flow control. Also fix up a few small issues
in the code:

* Unnecessary (unsigned long) cast, use '%zd' instead
* Total up errors returned from unlink_file calls and return to caller
* Be consistent with scriptlets- we run pre_remove on dbonly, so we
  should also run post_remove. Both can be disabled by way of the
  --noscriptlet argument.
* Don't pass an invalid pointer to oldpkg to the event callbacks;
  instead call the callback before we free the object.

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2011-12-23 10:12:08 -06:00
parent 92216c5864
commit 6b29374a60
1 changed files with 54 additions and 45 deletions
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99
lib/libalpm/remove.c
View File

@ -354,38 +354,15 @@ static int unlink_file(alpm_handle_t *handle, alpm_pkg_t *oldpkg,
return 0;
}
int _alpm_remove_single_package(alpm_handle_t *handle,
static int remove_package_files(alpm_handle_t *handle,
alpm_pkg_t *oldpkg, alpm_pkg_t *newpkg,
size_t targ_count, size_t pkg_count)
{
alpm_list_t *skip_remove;
size_t filenum = 0, position = 0;
const char *pkgname = oldpkg->name;
const char *pkgver = oldpkg->version;
alpm_filelist_t *filelist;
size_t i;
if(newpkg) {
_alpm_log(handle, ALPM_LOG_DEBUG, "removing old package first (%s-%s)\n",
pkgname, pkgver);
} else {
EVENT(handle, ALPM_EVENT_REMOVE_START, oldpkg, NULL);
_alpm_log(handle, ALPM_LOG_DEBUG, "removing package %s-%s\n",
pkgname, pkgver);
/* run the pre-remove scriptlet if it exists */
if(alpm_pkg_has_scriptlet(oldpkg) &&
!(handle->trans->flags & ALPM_TRANS_FLAG_NOSCRIPTLET)) {
char *scriptlet = _alpm_local_db_pkgpath(handle->db_local,
oldpkg, "install");
_alpm_runscriptlet(handle, scriptlet, "pre_remove", pkgver, NULL, 0);
free(scriptlet);
}
}
if(handle->trans->flags & ALPM_TRANS_FLAG_DBONLY) {
goto db;
}
size_t i, filenum = 0, position = 0;
int err = 0;
int nosave = handle->trans->flags & ALPM_TRANS_FLAG_NOSAVE;
if(newpkg) {
alpm_filelist_t *newfiles;
@ -416,32 +393,33 @@ int _alpm_remove_single_package(alpm_handle_t *handle,
alpm_file_t *file = filelist->files + i;
if(!can_remove_file(handle, file, skip_remove)) {
_alpm_log(handle, ALPM_LOG_DEBUG,
"not removing package '%s', can't remove all files\n", pkgname);
"not removing package '%s', can't remove all files\n",
oldpkg->name);
FREELIST(skip_remove);
RET_ERR(handle, ALPM_ERR_PKG_CANT_REMOVE, -1);
}
filenum++;
}
_alpm_log(handle, ALPM_LOG_DEBUG, "removing %ld files\n", (unsigned long)filenum);
_alpm_log(handle, ALPM_LOG_DEBUG, "removing %zd files\n", filenum);
if(!newpkg) {
/* init progress bar, but only on true remove transactions */
PROGRESS(handle, ALPM_PROGRESS_REMOVE_START, pkgname, 0,
PROGRESS(handle, ALPM_PROGRESS_REMOVE_START, oldpkg->name, 0,
pkg_count, targ_count);
}
/* iterate through the list backwards, unlinking files */
for(i = filelist->count; i > 0; i--) {
alpm_file_t *file = filelist->files + i - 1;
int percent;
/* TODO: check return code and handle accordingly */
unlink_file(handle, oldpkg, newpkg, file, skip_remove,
handle->trans->flags & ALPM_TRANS_FLAG_NOSAVE);
if(unlink_file(handle, oldpkg, newpkg, file, skip_remove, nosave) < 0) {
err++;
}
if(!newpkg) {
/* update progress bar after each file */
percent = (position * 100) / filenum;
PROGRESS(handle, ALPM_PROGRESS_REMOVE_START, pkgname,
int percent = (position * 100) / filenum;
PROGRESS(handle, ALPM_PROGRESS_REMOVE_START, oldpkg->name,
percent, pkg_count, targ_count);
}
position++;
@ -450,20 +428,56 @@ int _alpm_remove_single_package(alpm_handle_t *handle,
if(!newpkg) {
/* set progress to 100% after we finish unlinking files */
PROGRESS(handle, ALPM_PROGRESS_REMOVE_START, pkgname, 100,
PROGRESS(handle, ALPM_PROGRESS_REMOVE_START, oldpkg->name, 100,
pkg_count, targ_count);
}
/* run the post-remove script if it exists */
return err;
}
int _alpm_remove_single_package(alpm_handle_t *handle,
alpm_pkg_t *oldpkg, alpm_pkg_t *newpkg,
size_t targ_count, size_t pkg_count)
{
const char *pkgname = oldpkg->name;
const char *pkgver = oldpkg->version;
if(newpkg) {
_alpm_log(handle, ALPM_LOG_DEBUG, "removing old package first (%s-%s)\n",
pkgname, pkgver);
} else {
EVENT(handle, ALPM_EVENT_REMOVE_START, oldpkg, NULL);
_alpm_log(handle, ALPM_LOG_DEBUG, "removing package %s-%s\n",
pkgname, pkgver);
/* run the pre-remove scriptlet if it exists */
if(alpm_pkg_has_scriptlet(oldpkg) &&
!(handle->trans->flags & ALPM_TRANS_FLAG_NOSCRIPTLET)) {
char *scriptlet = _alpm_local_db_pkgpath(handle->db_local,
oldpkg, "install");
_alpm_runscriptlet(handle, scriptlet, "post_remove", pkgver, NULL, 0);
_alpm_runscriptlet(handle, scriptlet, "pre_remove", pkgver, NULL, 0);
free(scriptlet);
}
}
db:
if(!(handle->trans->flags & ALPM_TRANS_FLAG_DBONLY)) {
/* TODO check returned errors if any */
remove_package_files(handle, oldpkg, newpkg, targ_count, pkg_count);
}
/* run the post-remove script if it exists */
if(!newpkg && alpm_pkg_has_scriptlet(oldpkg) &&
!(handle->trans->flags & ALPM_TRANS_FLAG_NOSCRIPTLET)) {
char *scriptlet = _alpm_local_db_pkgpath(handle->db_local,
oldpkg, "install");
_alpm_runscriptlet(handle, scriptlet, "post_remove", pkgver, NULL, 0);
free(scriptlet);
}
if(!newpkg) {
EVENT(handle, ALPM_EVENT_REMOVE_DONE, oldpkg, NULL);
}
/* remove the package from the database */
_alpm_log(handle, ALPM_LOG_DEBUG, "updating database\n");
_alpm_log(handle, ALPM_LOG_DEBUG, "removing database entry '%s'\n", pkgname);
@ -477,11 +491,6 @@ db:
pkgname);
}
if(!newpkg) {
/* TODO: awesome! we're passing invalid pointers. */
EVENT(handle, ALPM_EVENT_REMOVE_DONE, oldpkg, NULL);
}
return 0;
}