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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2019 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <squareball.h>
#include "shell-command-parser.h"
typedef enum {
START_COMMAND = 1,
START_REPO,
START_REPO2,
REPO,
START_ESCAPED,
} command_state_t;
char*
bgr_shell_command_parse(const char *command)
{
command_state_t state = START_COMMAND;
size_t start = 0;
size_t command_len = strlen(command);
sb_string_t *rv = sb_string_new();
for (size_t current = 0; current < command_len; current++) {
char c = command[current];
switch (state) {
case START_COMMAND:
if (c == ' ') {
if (((current == 16) &&
(0 == strncmp("git-receive-pack", command, 16))) ||
((current == 15) &&
(0 == strncmp("git-upload-pack", command, 15))) ||
((current == 18) &&
(0 == strncmp("git-upload-archive", command, 18))))
{
state = START_REPO;
break;
}
goto error;
}
break;
case START_REPO:
if (c == '\'') { // never saw git using double-quotes
state = START_REPO2;
break;
}
if (c == '\\') { // escaped ! or '
state = START_ESCAPED;
break;
}
goto error;
case START_REPO2:
if (c == '\'') {
state = START_REPO;
break;
}
start = current;
if (rv->len == 0 && c == '/') { // no absolute urls
start = current + 1;
}
state = REPO;
break;
case START_ESCAPED:
if (c == '!' || c == '\'') {
sb_string_append_c(rv, c);
state = START_REPO;
break;
}
goto error;
case REPO:
if (c == '\'') {
sb_string_append_len(rv, command + start, current - start);
state = START_REPO;
break;
}
break;
}
}
if (rv->len > 0)
return sb_string_free(rv, false);
error:
sb_string_free(rv, true);
return NULL;
}
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