Ensure reported missing dependencies show correct version comparison

This addresses FS#23424. The -dd backend code was introduced in commit
b6ec9019d7, and unfortunately the munged depend used for comparison did
not carry through to the eventual display of this version. To fix this,
we undo some of the depcmp_tolerant() business introduced, and instead
make a new pmdepend_t object if necessary when the no dependency version
flag is set. This results in the correct depend being copied to the
missing depend passed onto the frontend.

Signed-off-by: Dan McGee <dan@archlinux.org>

lib/libalpm/deps.c

@@ -204,13 +204,37 @@ alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, int reverse)
 	return(newtargs);
 }
 
+static int no_dep_version(void)
+{
+	int flags = alpm_trans_get_flags();
+	return flags != -1 && (flags & PM_TRANS_FLAG_NODEPVERSION);
+}
+
+static pmdepend_t *filtered_depend(pmdepend_t *dep, int nodepversion)
+{
+	if(nodepversion) {
+		pmdepend_t *newdep = _alpm_dep_dup(dep);
+		ASSERT(newdep, return(dep));
+		newdep->mod = PM_DEP_MOD_ANY;
+		dep = newdep;
+	}
+	return dep;
+}
+
+static void release_filtered_depend(pmdepend_t *dep, int nodepversion)
+{
+	if(nodepversion) {
+		free(dep);
+	}
+}
+
 static pmpkg_t *find_dep_satisfier(alpm_list_t *pkgs, pmdepend_t *dep)
 {
 	alpm_list_t *i;
 
 	for(i = pkgs; i; i = alpm_list_next(i)) {
 		pmpkg_t *pkg = i->data;
-		if(_alpm_depcmp_tolerant(pkg, dep)) {
+		if(_alpm_depcmp(pkg, dep)) {
 			return(pkg);
 		}
 	}
@@ -245,6 +269,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
 	alpm_list_t *i, *j;
 	alpm_list_t *targets, *dblist = NULL, *modified = NULL;
 	alpm_list_t *baddeps = NULL;
+	int nodepversion;
 
 	ALPM_LOG_FUNC;
 
@@ -259,6 +284,8 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
 	}
 	alpm_list_free(targets);
 
+	nodepversion = no_dep_version();
+
 	/* look for unsatisfied dependencies of the upgrade list */
 	for(i = upgrade; i; i = i->next) {
 		pmpkg_t *tp = i->data;
@@ -267,6 +294,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
 
 		for(j = alpm_pkg_get_depends(tp); j; j = j->next) {
 			pmdepend_t *depend = j->data;
+			depend = filtered_depend(depend, nodepversion);
 			/* 1. we check the upgrade list */
 			/* 2. we check database for untouched satisfying packages */
 			if(!find_dep_satisfier(upgrade, depend) &&
@@ -280,6 +308,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
 				miss = depmiss_new(alpm_pkg_get_name(tp), depend, NULL);
 				baddeps = alpm_list_add(baddeps, miss);
 			}
+			release_filtered_depend(depend, nodepversion);
 		}
 	}
 
@@ -290,6 +319,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
 			pmpkg_t *lp = i->data;
 			for(j = alpm_pkg_get_depends(lp); j; j = j->next) {
 				pmdepend_t *depend = j->data;
+				depend = filtered_depend(depend, nodepversion);
 				pmpkg_t *causingpkg = find_dep_satisfier(modified, depend);
 				/* we won't break this depend, if it is already broken, we ignore it */
 				/* 1. check upgrade list for satisfiers */
@@ -305,6 +335,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
 					miss = depmiss_new(lp->name, depend, alpm_pkg_get_name(causingpkg));
 					baddeps = alpm_list_add(baddeps, miss);
 				}
+				release_filtered_depend(depend, nodepversion);
 			}
 		}
 	}
@@ -336,18 +367,10 @@ static int dep_vercmp(const char *version1, pmdepmod_t mod,
 	return(equal);
 }
 
-/* nodepversion: skip version checking */
+int _alpm_depcmp(pmpkg_t *pkg, pmdepend_t *dep)
-static int _depcmp(pmpkg_t *pkg, pmdepend_t *dep, int nodepversion)
 {
 	alpm_list_t *i;
 	int satisfy = 0;
-	int depmod;
-
-	if(nodepversion) {
-		depmod = PM_DEP_MOD_ANY;
-	} else {
-		depmod = dep->mod;
-	}
 
 	/* check (pkg->name, pkg->version) */
 	if(pkg->name_hash && dep->name_hash
@@ -355,7 +378,7 @@ static int _depcmp(pmpkg_t *pkg, pmdepend_t *dep, int nodepversion)
 		/* skip more expensive checks */
 	} else {
 		satisfy = (strcmp(pkg->name, dep->name) == 0
-				&& dep_vercmp(pkg->version, depmod, dep->version));
+				&& dep_vercmp(pkg->version, dep->mod, dep->version));
 		if(satisfy) {
 			return(satisfy);
 		}
@@ -367,7 +390,7 @@ static int _depcmp(pmpkg_t *pkg, pmdepend_t *dep, int nodepversion)
 		const char *provver = strchr(provision, '=');
 
 		if(provver == NULL) { /* no provision version */
-			satisfy = (depmod == PM_DEP_MOD_ANY
+			satisfy = (dep->mod == PM_DEP_MOD_ANY
 					&& strcmp(provision, dep->name) == 0);
 		} else {
 			/* This is a bit tricker than the old code for performance reasons. To
@@ -379,32 +402,13 @@ static int _depcmp(pmpkg_t *pkg, pmdepend_t *dep, int nodepversion)
 			provver += 1;
 			satisfy = (strlen(dep->name) == namelen
 					&& strncmp(provision, dep->name, namelen) == 0
-					&& dep_vercmp(provver, depmod, dep->version));
+					&& dep_vercmp(provver, dep->mod, dep->version));
 		}
 	}
 
 	return(satisfy);
 }
 
-/* tolerant : respects NODEPVERSION flag */
-int _alpm_depcmp_tolerant(pmpkg_t *pkg, pmdepend_t *dep)
-{
-	int nodepversion = 0;
-	int flags = alpm_trans_get_flags();
-
-	if (flags != -1) {
-		nodepversion = flags & PM_TRANS_FLAG_NODEPVERSION;
-	}
-
-	return(_depcmp(pkg, dep, nodepversion));
-}
-
-/* strict : ignores NODEPVERSION flag */
-int _alpm_depcmp(pmpkg_t *pkg, pmdepend_t *dep)
-{
-	return(_depcmp(pkg, dep, 0));
-}
-
 pmdepend_t *_alpm_splitdep(const char *depstring)
 {
 	pmdepend_t *depend;
@@ -562,7 +566,7 @@ static pmpkg_t *resolvedep(pmdepend_t *dep, alpm_list_t *dbs,
 	/* 1. literals */
 	for(i = dbs; i; i = i->next) {
 		pmpkg_t *pkg = _alpm_db_get_pkgfromcache(i->data, dep->name);
-		if(pkg && _alpm_depcmp_tolerant(pkg, dep) && !_alpm_pkg_find(excluding, pkg->name)) {
+		if(pkg && _alpm_depcmp(pkg, dep) && !_alpm_pkg_find(excluding, pkg->name)) {
 			if(_alpm_pkg_should_ignore(pkg)) {
 				int install = 0;
 				if (prompt) {
@@ -583,7 +587,7 @@ static pmpkg_t *resolvedep(pmdepend_t *dep, alpm_list_t *dbs,
 	for(i = dbs; i; i = i->next) {
 		for(j = _alpm_db_get_pkgcache(i->data); j; j = j->next) {
 			pmpkg_t *pkg = j->data;
-			if(_alpm_depcmp_tolerant(pkg, dep) && strcmp(pkg->name, dep->name) != 0 &&
+			if(_alpm_depcmp(pkg, dep) && strcmp(pkg->name, dep->name) != 0 &&
 			             !_alpm_pkg_find(excluding, pkg->name)) {
 				if(_alpm_pkg_should_ignore(pkg)) {
 					int install = 0;

lib/libalpm/deps.h

@@ -52,7 +52,6 @@ int _alpm_resolvedeps(alpm_list_t *localpkgs, alpm_list_t *dbs_sync, pmpkg_t *pk
 		alpm_list_t **data);
 pmdepend_t *_alpm_splitdep(const char *depstring);
 int _alpm_depcmp(pmpkg_t *pkg, pmdepend_t *dep);
-int _alpm_depcmp_tolerant(pmpkg_t *pkg, pmdepend_t *dep);
 
 #endif /* _ALPM_DEPS_H */