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/*
* blogc: A blog compiler.
* Copyright (C) 2015 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif /* HAVE_SYS_STAT_H */
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "utils/utils.h"
#include "source-parser.h"
#include "template-parser.h"
#include "loader.h"
#include "renderer.h"
#include "error.h"
#ifndef PACKAGE_VERSION
#define PACKAGE_VERSION "Unknown"
#endif
static void
blogc_print_help(void)
{
printf(
"usage:\n"
" blogc [-h] [-v] [-l] [-D KEY=VALUE ...] [-p KEY] [-t TEMPLATE] [-o OUTPUT] SOURCE [SOURCE ...] - A blog compiler.\n"
"\n"
"positional arguments:\n"
" SOURCE source file(s)\n"
"\n"
"optional arguments:\n"
" -h show this help message and exit\n"
" -v show version and exit\n"
" -l build listing page, from multiple source files\n"
" -D KEY=VALUE set global configuration parameter\n"
" -p KEY show the value of a global configuration parameter after source parsing and exit\n"
" -t TEMPLATE template file\n"
" -o OUTPUT output file\n");
}
static void
blogc_print_usage(void)
{
printf("usage: blogc [-h] [-v] [-l] [-D KEY=VALUE ...] [-p KEY] [-t TEMPLATE] [-o OUTPUT] SOURCE [SOURCE ...]\n");
}
static void
blogc_mkdir_recursive(const char *filename)
{
#if defined(HAVE_SYS_STAT_H) && defined(HAVE_SYS_TYPES_H)
// honor umask if possible
mode_t m = umask(0);
umask(m);
mode_t mode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~m;
#endif
char *fname = b_strdup(filename);
for (char *tmp = fname; *tmp != '\0'; tmp++) {
if (*tmp == '/' || *tmp == '\\') {
#if defined(HAVE_SYS_STAT_H) && defined(HAVE_SYS_TYPES_H)
char bkp = *tmp;
*tmp = '\0';
if ((strlen(fname) > 0) && (-1 == mkdir(fname, mode)) && (errno != EEXIST)) {
fprintf(stderr, "blogc: error: failed to create output "
"directory (%s): %s\n", fname, strerror(errno));
free(fname);
exit(2);
}
*tmp = bkp;
#else
// FIXME: show this warning only if actually trying to create a directory.
fprintf(stderr, "blogc: warning: can't create output directories "
"for your platform. please create the directories yourself.\n");
break;
#endif
}
}
free(fname);
}
int
main(int argc, char **argv)
{
int rv = 0;
bool listing = false;
char *template = NULL;
char *output = NULL;
char *print = NULL;
char *tmp = NULL;
char **pieces = NULL;
b_slist_t *sources = NULL;
b_trie_t *config = b_trie_new(free);
b_trie_insert(config, "BLOGC_VERSION", b_strdup(PACKAGE_VERSION));
for (unsigned int i = 1; i < argc; i++) {
tmp = NULL;
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case 'h':
blogc_print_help();
goto cleanup;
case 'v':
printf("%s\n", PACKAGE_STRING);
goto cleanup;
case 'l':
listing = true;
break;
case 't':
if (argv[i][2] != '\0')
template = b_strdup(argv[i] + 2);
else if (i + 1 < argc)
template = b_strdup(argv[++i]);
break;
case 'o':
if (argv[i][2] != '\0')
output = b_strdup(argv[i] + 2);
else if (i + 1 < argc)
output = b_strdup(argv[++i]);
break;
case 'p':
if (argv[i][2] != '\0')
print = b_strdup(argv[i] + 2);
else if (i + 1 < argc)
print = b_strdup(argv[++i]);
break;
case 'D':
if (argv[i][2] != '\0')
tmp = argv[i] + 2;
else if (i + 1 < argc)
tmp = argv[++i];
if (tmp != NULL) {
pieces = b_str_split(tmp, '=', 2);
if (b_strv_length(pieces) != 2) {
fprintf(stderr, "blogc: error: invalid value for "
"-D (must have an '='): %s\n", tmp);
b_strv_free(pieces);
rv = 2;
goto cleanup;
}
for (unsigned int j = 0; pieces[0][j] != '\0'; j++) {
if (!((pieces[0][j] >= 'A' && pieces[0][j] <= 'Z') ||
pieces[0][j] == '_'))
{
fprintf(stderr, "blogc: error: invalid value "
"for -D (configuration key must be uppercase "
"with '_'): %s\n", pieces[0]);
b_strv_free(pieces);
rv = 2;
goto cleanup;
}
}
b_trie_insert(config, pieces[0], b_strdup(pieces[1]));
b_strv_free(pieces);
pieces = NULL;
}
break;
default:
blogc_print_usage();
fprintf(stderr, "blogc: error: invalid argument: -%c\n",
argv[i][1]);
rv = 2;
goto cleanup;
}
}
else
sources = b_slist_append(sources, b_strdup(argv[i]));
}
if (b_slist_length(sources) == 0) {
blogc_print_usage();
if (listing)
fprintf(stderr, "blogc: error: at least one source file is required\n");
else
fprintf(stderr, "blogc: error: one source file is required\n");
rv = 2;
goto cleanup;
}
if (!listing && b_slist_length(sources) > 1) {
blogc_print_usage();
fprintf(stderr, "blogc: error: only one source file should be provided, "
"if running without '-l'\n");
rv = 2;
goto cleanup;
}
blogc_error_t *err = NULL;
b_slist_t *s = blogc_source_parse_from_files(config, sources, &err);
if (err != NULL) {
blogc_error_print(err);
rv = 2;
goto cleanup2;
}
b_slist_t* l = blogc_template_parse_from_file(template, &err);
if (err != NULL) {
blogc_error_print(err);
rv = 2;
goto cleanup3;
}
if (print != NULL) {
const char *val = b_trie_lookup(config, print);
if (val == NULL) {
fprintf(stderr, "blogc: error: configuration variable not found: %s\n",
print);
rv = 2;
}
else {
printf("%s\n", val);
}
goto cleanup3;
}
if (template == NULL) {
blogc_print_usage();
fprintf(stderr, "blogc: error: argument -t is required when rendering content\n");
rv = 2;
goto cleanup3;
}
char *out = blogc_render(l, s, config, listing);
bool write_to_stdout = (output == NULL || (0 == strcmp(output, "-")));
FILE *fp = stdout;
if (!write_to_stdout) {
blogc_mkdir_recursive(output);
fp = fopen(output, "w");
if (fp == NULL) {
fprintf(stderr, "blogc: error: failed to open output file (%s): %s\n",
output, strerror(errno));
rv = 2;
goto cleanup4;
}
}
if (out != NULL)
fprintf(fp, "%s", out);
if (!write_to_stdout)
fclose(fp);
cleanup4:
free(out);
cleanup3:
blogc_template_free_stmts(l);
cleanup2:
b_slist_free_full(s, (b_free_func_t) b_trie_free);
blogc_error_free(err);
cleanup:
b_trie_free(config);
free(template);
free(output);
free(print);
b_slist_free_full(sources, free);
return rv;
}
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