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authorRoman Zippel <zippel@linux-m68k.org>2008-01-14 04:50:54 +0100
committerSam Ravnborg <sam@ravnborg.org>2008-01-28 23:14:39 +0100
commit93449082e905ce73d0346d617dd67c4b668b58af (patch)
treeeba7030f32ce18fa71562224ee2e0d8ddda33421 /scripts/kconfig/symbol.c
parent7a962923359768e04137125bd479fd0dfa6117d3 (diff)
downloadlinux-linaro-stable-93449082e905ce73d0346d617dd67c4b668b58af.tar.gz
kconfig: environment symbol support
Add the possibility to import a value from the environment into kconfig via the option syntax. Beside flexibility this has the advantage providing proper dependencies. Documented the options syntax. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts/kconfig/symbol.c')
-rw-r--r--scripts/kconfig/symbol.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index a7dfc82fc858..99e3d02d1cfc 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -34,6 +34,8 @@ struct symbol *sym_defconfig_list;
struct symbol *modules_sym;
tristate modules_val;
+struct expr *sym_env_list;
+
void sym_add_default(struct symbol *sym, const char *def)
{
struct property *prop = prop_alloc(P_DEFAULT, sym);
@@ -117,6 +119,15 @@ struct property *sym_get_choice_prop(struct symbol *sym)
return NULL;
}
+struct property *sym_get_env_prop(struct symbol *sym)
+{
+ struct property *prop;
+
+ for_all_properties(sym, prop, P_ENV)
+ return prop;
+ return NULL;
+}
+
struct property *sym_get_default_prop(struct symbol *sym)
{
struct property *prop;
@@ -346,6 +357,9 @@ void sym_calc_value(struct symbol *sym)
;
}
+ if (sym->flags & SYMBOL_AUTO)
+ sym->flags &= ~SYMBOL_WRITE;
+
sym->curr = newval;
if (sym_is_choice(sym) && newval.tri == yes)
sym->curr.val = sym_calc_choice(sym);
@@ -860,6 +874,8 @@ const char *prop_get_type_name(enum prop_type type)
switch (type) {
case P_PROMPT:
return "prompt";
+ case P_ENV:
+ return "env";
case P_COMMENT:
return "comment";
case P_MENU:
@@ -877,3 +893,32 @@ const char *prop_get_type_name(enum prop_type type)
}
return "unknown";
}
+
+void prop_add_env(const char *env)
+{
+ struct symbol *sym, *sym2;
+ struct property *prop;
+ char *p;
+
+ sym = current_entry->sym;
+ sym->flags |= SYMBOL_AUTO;
+ for_all_properties(sym, prop, P_ENV) {
+ sym2 = prop_get_symbol(prop);
+ if (strcmp(sym2->name, env))
+ menu_warn(current_entry, "redefining environment symbol from %s",
+ sym2->name);
+ return;
+ }
+
+ prop = prop_alloc(P_ENV, sym);
+ prop->expr = expr_alloc_symbol(sym_lookup(env, 1));
+
+ sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
+ sym_env_list->right.sym = sym;
+
+ p = getenv(env);
+ if (p)
+ sym_add_default(sym, p);
+ else
+ menu_warn(current_entry, "environment variable %s undefined", env);
+}