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pkgconf
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pkg: add a more flexible framework for multi-level compare required for fuzzy Provides rules.

pull/100/head
William Pitcock 2016-09-08 23:54:57 -05:00
parent 9783181cce
commit c2c7e7488e
2 changed files with 51 additions and 13 deletions
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2
libpkgconf/libpkgconf.h
View File

@ -33,6 +33,8 @@ typedef enum {
PKGCONF_CMP_GREATER_THAN_EQUAL
} pkgconf_pkg_comparator_t;
#define PKGCONF_CMP_COUNT 7
typedef struct pkgconf_pkg_ pkgconf_pkg_t;
typedef struct pkgconf_dependency_ pkgconf_dependency_t;
typedef struct pkgconf_tuple_ pkgconf_tuple_t;

62
libpkgconf/pkg.c
View File

@ -881,14 +881,55 @@ typedef struct {
unsigned int flags;
} pkgconf_pkg_scan_providers_ctx_t;
typedef struct {
const pkgconf_vercmp_res_func_t depcmp;
const pkgconf_vercmp_res_func_t rulecmp[PKGCONF_CMP_COUNT];
} pkgconf_pkg_provides_vermatch_rule_t;
static const pkgconf_pkg_provides_vermatch_rule_t pkgconf_pkg_provides_vermatch_rules[] = {
[PKGCONF_CMP_ANY] = {
.depcmp = pkgconf_pkg_comparator_any,
.rulecmp = {
[PKGCONF_CMP_ANY] = pkgconf_pkg_comparator_any,
[PKGCONF_CMP_LESS_THAN] = pkgconf_pkg_comparator_any,
[PKGCONF_CMP_GREATER_THAN] = pkgconf_pkg_comparator_any,
[PKGCONF_CMP_LESS_THAN_EQUAL] = pkgconf_pkg_comparator_any,
[PKGCONF_CMP_GREATER_THAN_EQUAL] = pkgconf_pkg_comparator_any,
[PKGCONF_CMP_EQUAL] = pkgconf_pkg_comparator_any,
[PKGCONF_CMP_NOT_EQUAL] = pkgconf_pkg_comparator_any,
}
},
};
/*
* pkgconf_pkg_scan_provides_vercmp(pkgdep, provider)
*
* compare a provides node against the requested dependency node.
*
* XXX: handle PKGCONF_CMP_ANY in a versioned comparison
*/
static bool
pkgconf_pkg_scan_provides_vercmp(const pkgconf_dependency_t *pkgdep, const pkgconf_dependency_t *provider)
{
const pkgconf_pkg_provides_vermatch_rule_t *rule = &pkgconf_pkg_provides_vermatch_rules[pkgdep->compare];
if (rule == NULL)
return false;
if (!rule->depcmp(pkgdep->version, provider->version))
return false;
if (rule->rulecmp[provider->compare] != NULL &&
!rule->rulecmp[provider->compare](provider->version, pkgdep->version))
return false;
return true;
}
/*
* pkgconf_pkg_scan_provides_entry(pkg, ctx)
*
* attempt to match a single package's Provides rules against the requested dependency node.
*
* XXX: implement support for version comparisons using backwards dependency version checks,
* right now, we only support Provides rules that are PKGCONF_CMP_ANY as this is still
* proof-of-concept.
*/
static bool
pkgconf_pkg_scan_provides_entry(const pkgconf_pkg_t *pkg, const pkgconf_pkg_scan_providers_ctx_t *ctx)
@ -896,16 +937,11 @@ pkgconf_pkg_scan_provides_entry(const pkgconf_pkg_t *pkg, const pkgconf_pkg_scan
const pkgconf_dependency_t *pkgdep = ctx->pkgdep;
pkgconf_node_t *node;
switch (pkgdep->compare)
PKGCONF_FOREACH_LIST_ENTRY(pkg->provides.head, node)
{
case PKGCONF_CMP_ANY:
PKGCONF_FOREACH_LIST_ENTRY(pkg->provides.head, node)
{
const pkgconf_dependency_t *provider = node->data;
if (!strcmp(provider->package, pkgdep->package))
return true;
}
break;
const pkgconf_dependency_t *provider = node->data;
if (!strcmp(provider->package, pkgdep->package))
return pkgconf_pkg_scan_provides_vercmp(pkgdep, provider);
}
return false;