#include "common.h"

#include <stdio.h>

#include <string.h>

#include <errno.h>

/* Shamelessly borrowed from http://stackoverflow.com/questions/3417837/

 * with permission of the original author, Martin Pool.

 * http://sourcefrog.net/weblog/software/languages/C/unused.html

 */

#ifdef UNUSED

#elif defined(__GNUC__)

# define UNUSED(x) UNUSED_ ## x __attribute__((unused))

#elif defined(__LCLINT__)

# define UNUSED(x) /*@unused@*/ x

#else

# define UNUSED(x) x

#endif

static int readline(char **out)

{

	int c, error = 0, length = 0, allocated = 0;

	char *line = NULL;

	errno = 0;

	while ((c = getchar()) != EOF) {

		if (length == allocated) {

			allocated += 16;

			if ((line = realloc(line, allocated)) == NULL) {

				error = -1;

				goto error;

			}

		}

		if (c == '\n')

			break;

		line[length++] = c;

	}

	if (errno != 0) {

		error = -1;

		goto error;

	}

	line[length] = '\0';

	*out = line;

	line = NULL;

	error = length;

error:

	free(line);

	return error;

}

int cred_acquire_cb(git_cred **out,

		const char * UNUSED(url),

		const char * UNUSED(username_from_url),

		unsigned int UNUSED(allowed_types),

		void * UNUSED(payload))

{

	char *username = NULL, *password = NULL;

	int error;

	printf("Username: ");

	if (readline(&username) < 0) {

		fprintf(stderr, "Unable to read username: %s", strerror(errno));

		return -1;

	}

	/* Yup. Right there on your terminal. Careful where you copy/paste output. */

	printf("Password: ");

	if (readline(&password) < 0) {

		fprintf(stderr, "Unable to read password: %s", strerror(errno));

		free(username);

		return -1;

	}

	error = git_cred_userpass_plaintext_new(out, username, password);

	free(username);

	free(password);

	return error;

}