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authorNagy Gabor <ngaba@bibl.u-szeged.hu>2007-11-29 13:54:44 +0100
committerDan McGee <dan@archlinux.org>2007-11-30 21:17:04 -0600
commit2ed6b482d2fce916466e44e37930f0b0c0d928bb (patch)
tree3c4bf19fa1174fec660d12aeed5dd5e4e77ff378 /lib/libalpm/deps.c
parent5c21f0f15281fda6e0515e83c2e37989752bbfab (diff)
alpm_checkdeps clean-up
No bugfixes, just makes the code human-readable Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu> Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib/libalpm/deps.c')
-rw-r--r--lib/libalpm/deps.c151
1 files changed, 34 insertions, 117 deletions
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index 4a4f6545..ff4b9c57 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -229,6 +229,12 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
return(newtargs);
}
+/* Little helper function for alpm_list_find */
+static int satisfycmp(const void *pkg, const void *depend)
+{
+ return(!alpm_depcmp((pmpkg_t*) pkg, (pmdepend_t*) depend));
+}
+
/** Checks dependencies and returns missing ones in a list.
* Dependencies can include versions with depmod operators.
* @param db pointer to the local package database
@@ -240,8 +246,8 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode)
alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
alpm_list_t *remove, alpm_list_t *upgrade)
{
- alpm_list_t *i, *j, *k, *l;
- int found = 0;
+ alpm_list_t *i, *j;
+ alpm_list_t *joined, *dblist;
alpm_list_t *baddeps = NULL;
pmdepmissing_t *miss = NULL;
@@ -251,6 +257,10 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
return(NULL);
}
+ joined = alpm_list_join(alpm_list_copy(remove), alpm_list_copy(upgrade));
+ dblist = alpm_list_diff(_alpm_db_get_pkgcache(db), joined, _alpm_pkg_cmp);
+ alpm_list_free(joined);
+
/* look for unsatisfied dependencies of the upgrade list */
for(i = upgrade; i; i = i->next) {
pmpkg_t *tp = i->data;
@@ -262,34 +272,19 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
alpm_pkg_get_name(tp), alpm_pkg_get_version(tp));
for(j = alpm_pkg_get_depends(tp); j; j = j->next) {
- /* split into name/version pairs */
pmdepend_t *depend = j->data;
- found = 0;
/* 1. we check the upgrade list */
- for(k = upgrade; k && !found; k = k->next) {
- pmpkg_t *p = k->data;
- found = p && alpm_depcmp(p, depend);
- }
/* 2. we check database for untouched satisfying packages */
- for(k = _alpm_db_get_pkgcache(db); k && !found; k = k->next) {
- pmpkg_t *p = k->data;
- found = p && alpm_depcmp(p, depend)
- && !_alpm_pkg_find(alpm_pkg_get_name(p), upgrade)
- && !_alpm_pkg_find(alpm_pkg_get_name(p), remove);
- }
- /* else if still not found... */
- if(!found) {
+ if(!alpm_list_find(upgrade, depend, satisfycmp) &&
+ !alpm_list_find(dblist, depend, satisfycmp)) {
+ /* Unsatisfied dependency in the upgrade list */
char *missdepstring = alpm_dep_get_string(depend);
_alpm_log(PM_LOG_DEBUG, "missing dependency '%s' for package '%s'\n",
missdepstring, alpm_pkg_get_name(tp));
free(missdepstring);
miss = _alpm_depmiss_new(alpm_pkg_get_name(tp), depend->mod,
depend->name, depend->version);
- if(!_alpm_depmiss_isin(miss, baddeps)) {
- baddeps = alpm_list_add(baddeps, miss);
- } else {
- FREE(miss);
- }
+ baddeps = alpm_list_add(baddeps, miss);
}
}
}
@@ -298,113 +293,35 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
/* reversedeps handles the backwards dependencies, ie,
* the packages listed in the requiredby field. */
- /* we check the upgrade list then the remove list in one loop */
- int upgr = 1; /* we are in the upgrade list */
- i = upgrade;
- while(upgr || i) {
- if(!i) { /*this is the end of the upgrade list, jump to the remove list*/
- i = remove;
- upgr = 0;
- continue;
- }
- pmpkg_t *newpkg = i->data;
- pmpkg_t *oldpkg;
- alpm_list_t *requiredby;
- if(newpkg == NULL) {
- _alpm_log(PM_LOG_DEBUG, "null package found in package list\n");
- i = i->next;
- continue;
- }
- _alpm_log(PM_LOG_DEBUG, "checkdeps: package %s-%s\n",
- alpm_pkg_get_name(newpkg), alpm_pkg_get_version(newpkg));
+ alpm_list_t *modified = alpm_list_diff(_alpm_db_get_pkgcache(db), dblist, _alpm_pkg_cmp);
- if((oldpkg = _alpm_db_get_pkgfromcache(db, alpm_pkg_get_name(newpkg))) == NULL) {
- _alpm_log(PM_LOG_DEBUG, "cannot find package installed '%s'\n",
- alpm_pkg_get_name(newpkg));
- i = i->next;
+ for(i = dblist; i; i = i->next) {
+ pmpkg_t *lp = i->data;
+ if(lp == NULL) {
+ _alpm_log(PM_LOG_DEBUG, "null package found in localdb pkgcache\n");
continue;
}
-
- requiredby = alpm_pkg_compute_requiredby(oldpkg);
- for(j = requiredby; j; j = j->next) {
- pmpkg_t *p;
- found = 0;
-
- if(_alpm_pkg_find(j->data, upgrade) || _alpm_pkg_find(j->data, remove)) {
- continue;
- }
- if((p = _alpm_db_get_pkgfromcache(db, j->data)) == NULL) {
- /* hmmm... package isn't installed.. */
- continue;
- }
-
- for(k = alpm_pkg_get_depends(p); k; k = k->next) {
- pmdepend_t *depend = k->data;
+ for(j = alpm_pkg_get_depends(lp); j; j = j->next) {
+ pmdepend_t *depend = j->data;
+ /* we won't break this depend, if it is already broken, we ignore it */
+ /* 1. check upgrade list for satisfiers */
+ /* 2. check dblist for satisfiers */
+ if(alpm_list_find(modified, depend, satisfycmp) &&
+ !alpm_list_find(upgrade, depend, satisfycmp) &&
+ !alpm_list_find(dblist, depend, satisfycmp)) {
char *missdepstring = alpm_dep_get_string(depend);
-
- if(!alpm_depcmp(oldpkg, depend)) {
- continue;
- }
- /* OK, we don't want to break this depend */
-
- /* 1. for efficiency we check newpkg first if we are in the upgrade list */
- if(upgr && alpm_depcmp(newpkg, depend)) {
- _alpm_log(PM_LOG_DEBUG, "checkdeps: dependency '%s' also satisfied by the upgraded version of '%s'\n",
- missdepstring, alpm_pkg_get_name(newpkg));
- free(missdepstring);
- continue;
- }
- /* 2. we check the upgrade targets */
- int satisfied = 0;
- for(l = upgrade; l; l = l->next) {
- pmpkg_t *pkg = l->data;
- if(pkg && alpm_depcmp(pkg, depend)) {
- _alpm_log(PM_LOG_DEBUG, "checkdeps: dependency '%s' satisfied by '%s' from the upgrade list\n",
- missdepstring, alpm_pkg_get_name(pkg));
- free(missdepstring);
- satisfied = 1;
- break;
- }
- }
- if(satisfied) {
- continue;
- }
- /* 3. we check untouched installed packages to see if anything else
- * satisfies this... */
- for(l = _alpm_db_get_pkgcache(db); l; l = l->next) {
- pmpkg_t *pkg = l->data;
-
- if(pkg && alpm_depcmp(pkg, depend)
- && !_alpm_pkg_find(alpm_pkg_get_name(pkg), upgrade)
- && !_alpm_pkg_find(alpm_pkg_get_name(pkg), remove)) {
- _alpm_log(PM_LOG_DEBUG, "checkdeps: dependency '%s' satisfied by installed package '%s'\n",
- missdepstring, alpm_pkg_get_name(pkg));
- free(missdepstring);
- satisfied = 1;
- break;
- }
- }
- if(satisfied) {
- continue;
- }
-
- /* The transaction would break this depend, record it */
_alpm_log(PM_LOG_DEBUG, "checkdeps: the transaction would break '%s' dependency of '%s'\n",
- missdepstring, alpm_pkg_get_name(p));
+ missdepstring, alpm_pkg_get_name(lp));
free(missdepstring);
- miss = _alpm_depmiss_new(p->name, depend->mod,
+ miss = _alpm_depmiss_new(lp->name, depend->mod,
depend->name, depend->version);
- if(!_alpm_depmiss_isin(miss, baddeps)) {
- baddeps = alpm_list_add(baddeps, miss);
- } else {
- FREE(miss);
- }
+ baddeps = alpm_list_add(baddeps, miss);
}
}
- FREELIST(requiredby);
- i = alpm_list_next(i);
}
+ alpm_list_free(modified);
}
+ alpm_list_free(dblist);
return(baddeps);
}