int dag_parse(struct dag *d, FILE * dag_stream)
{
char *line = NULL;
struct lexer_book *bk = calloc(1, sizeof(struct lexer_book)); //Taking advantage that calloc zeroes memory
bk->d = d;
bk->stream = dag_stream;
bk->category = dag_task_category_lookup_or_create(d, "default");
while((line = dag_parse_readline(bk, NULL)) != NULL) {
if(strlen(line) == 0 || line[0] == '#') {
/* Skip blank lines and comments */
free(line);
continue;
}
if(strncmp(line, "export ", 7) == 0) {
if(!dag_parse_export(bk, line)) {
dag_parse_error(bk, "export");
goto failure;
}
} else if(strchr(line, '=')) {
if(!dag_parse_variable(bk, NULL, line)) {
dag_parse_error(bk, "variable");
goto failure;
}
} else if(strstr(line, ":")) {
if(!dag_parse_node(bk, line)) {
dag_parse_error(bk, "node");
goto failure;
}
} else {
dag_parse_error(bk, "syntax");
goto failure;
}
free(line);
}
//ok
dag_close_over_environment(d);
dag_compile_ancestors(d);
free(bk);
return 1;
failure:
free(line);
free(bk);
return 0;
}
static int dag_parse(struct dag *d, FILE *stream)
{
struct lexer *bk = lexer_create(STREAM, stream, 1, 1);
bk->d = d;
bk->stream = stream;
bk->category = dag_task_category_lookup_or_create(d, "default");
struct dag_variable_lookup_set s = { d, NULL, NULL, NULL };
bk->environment = &s;
struct token *t;
while((t = lexer_peek_next_token(bk)))
{
s.category = bk->category;
s.node = NULL;
s.table = NULL;
switch (t->type) {
case TOKEN_NEWLINE:
case TOKEN_SPACE:
/* Skip newlines, spaces at top level. */
lexer_free_token(lexer_next_token(bk));
break;
case TOKEN_SYNTAX:
dag_parse_syntax(bk);
break;
case TOKEN_FILES:
dag_parse_node(bk);
break;
case TOKEN_VARIABLE:
dag_parse_variable(bk, NULL);
break;
default:
lexer_report_error(bk, "Unexpected token. Expected one of NEWLINE, SPACE, SYNTAX, FILES, or VARIABLE, but got: %s\n:", lexer_print_token(t));
break;
}
}
dag_close_over_environment(d);
dag_compile_ancestors(d);
free(bk);
return 1;
}