/* Check that defining a variable with defnode leads to a corresponding
* entry in /augeas/variables and that that entry disappears when the
* variable is undefined
*/
static void testDefNodeCreateMeta(CuTest *tc) {
int r, created;
struct augeas *aug;
static const char *const expr = "/augeas/version/save/mode[last()+1]";
static const char *const expr_can = "/augeas/version/save/mode[5]";
const char *value;
aug = aug_init(root, loadpath, AUG_NO_STDINC|AUG_NO_LOAD);
CuAssertPtrNotNull(tc, aug);
CuAssertIntEquals(tc, AUG_NOERROR, aug_error(aug));
r = aug_defnode(aug, "var", expr, "other", &created);
CuAssertIntEquals(tc, 1, r);
CuAssertIntEquals(tc, 1, created);
r = aug_match(aug, "/augeas/variables/*", NULL);
CuAssertIntEquals(tc, 1, r);
r = aug_get(aug, "/augeas/variables/var", &value);
CuAssertStrEquals(tc, expr_can, value);
r = aug_defvar(aug, "var", NULL);
CuAssertIntEquals(tc, 0, r);
r = aug_match(aug, "/augeas/variables/*", NULL);
CuAssertIntEquals(tc, 0, r);
aug_close(aug);
}
static int Paug_defnode(lua_State *L)
{
augeas *a = Paug_checkarg(L, 1);
const char *name = luaL_checkstring(L, 2);
const char *expr = luaL_checkstring(L, 3);
const char *value = luaL_checkstring(L, 4);
return pushresult(L, aug_defnode(a, name, expr, value, NULL), a, NULL);
}
/*
* call-seq:
* defnode(NAME, EXPR, VALUE) -> boolean
*
* Define a variable NAME whose value is the result of evaluating EXPR,
* which must be non-NULL and evaluate to a nodeset. If a variable NAME
* already exists, its name will be replaced with the result of evaluating
* EXPR.
*
* If EXPR evaluates to an empty nodeset, a node is created, equivalent to
* calling AUG_SET(AUG, EXPR, VALUE) and NAME will be the nodeset containing
* that single node.
*
* Returns +false+ if +aug_defnode+ fails, and the number of nodes in the
* nodeset on success.
*/
VALUE augeas_defnode(VALUE s, VALUE name, VALUE expr, VALUE value) {
augeas *aug = aug_handle(s);
const char *cname = StringValueCStr(name);
const char *cexpr = StringValueCStrOrNull(expr);
const char *cvalue = StringValueCStrOrNull(value);
/* FIXME: Figure out a way to return created, maybe accept a block
that gets run when created == 1 ? */
int r = aug_defnode(aug, cname, cexpr, cvalue, NULL);
return (r < 0) ? Qfalse : INT2NUM(r);
}
guestfs_int_int_bool *
do_aug_defnode (const char *name, const char *expr, const char *val)
{
#ifdef HAVE_AUG_DEFNODE
static guestfs_int_int_bool r;
int created;
NEED_AUG (NULL);
r.i = aug_defnode (aug, name, expr, val, &created);
if (r.i == -1) {
reply_with_error ("Augeas defnode failed");
return NULL;
}
r.b = created;
return &r;
#else
NOT_AVAILABLE (NULL);
#endif
}
