#include <stdio.h> #include <string.h> #include "sass/context.h" Sass_Import_List sass_importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // get the cookie from importer descriptor void* cookie = sass_importer_get_cookie(cb); Sass_Import_List list = sass_make_import_list(2); char* local = sass_copy_c_string("local { color: green; }"); char* remote = sass_copy_c_string("remote { color: red; }"); list[0] = sass_make_import_entry("/tmp/styles.scss", local, 0); list[1] = sass_make_import_entry("http://www.example.com", remote, 0); return list; } int main( int argc, const char* argv[] ) { // get the input file from first argument or use default const char* input = argc > 1 ? argv[1] : "styles.scss"; // create the file context and get all related structs struct Sass_File_Context* file_ctx = sass_make_file_context(input); struct Sass_Context* ctx = sass_file_context_get_context(file_ctx); struct Sass_Options* ctx_opt = sass_context_get_options(ctx); // allocate custom importer Sass_Importer_Entry c_imp = sass_make_importer(sass_importer, 0, 0); // create list for all custom importers Sass_Importer_List imp_list = sass_make_importer_list(1); // put only the importer on to the list sass_importer_set_list_entry(imp_list, 0, c_imp); // register list on to the context options sass_option_set_c_importers(ctx_opt, imp_list); // context is set up, call the compile step now int status = sass_compile_file_context(file_ctx); // print the result or the error to the stdout if (status == 0) puts(sass_context_get_output_string(ctx)); else puts(sass_context_get_error_message(ctx)); // release allocated memory sass_delete_file_context(file_ctx); // exit status return status; }
Compile importer.c
gcc -c importer.c -o importer.o gcc -o importer importer.o -lsass echo "@import 'foobar';" > importer.scss ./importer importer.scss
Sass_Import_List importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // let LibSass handle the import request return NULL; } Sass_Import_List importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // let LibSass handle the request // swallows »@import "http://…"« pass-through // (arguably a bug) Sass_Import_List list = sass_make_import_list(1); list[0] = sass_make_import_entry(path, 0, 0); return list; } Sass_Import_List importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // return an error to halt execution Sass_Import_List list = sass_make_import_list(1); const char* message = "some error message"; list[0] = sass_make_import_entry(path, 0, 0); sass_import_set_error(list[0], sass_copy_c_string(message), 0, 0); return list; } Sass_Import_List importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // let LibSass load the file identifed by the importer Sass_Import_List list = sass_make_import_list(1); list[0] = sass_make_import_entry("/tmp/file.scss", 0, 0); return list; } Sass_Import_List importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // completely hide the import // (arguably a bug) Sass_Import_List list = sass_make_import_list(0); return list; } Sass_Import_List importer(const char* path, Sass_Importer_Entry cb, struct Sass_Compiler* comp) { // completely hide the import // (arguably a bug) Sass_Import_List list = sass_make_import_list(1); list[0] = sass_make_import_entry(0, 0, 0); return list; }