119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "action_list.h"
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#include "file.h"
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#include "myers.h"
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#include "utilities.h"
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#include "tree.h"
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static void usage(int exitcode) {
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printf("usage: merk <command> [<args>]\n\n init Initializes a repository in the current directory\n diff Displays the difference between the given two files\n status Displays a list of modified and untracked files in the repository\n");
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exit(exitcode);
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}
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int main(int argc, char **argv) {
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if (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))) {
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usage(0);
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}
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const char* subcmd = argv[1];
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if (strcmp(subcmd, "diff") != 0 && strcmp(subcmd, "init") != 0 && strcmp(subcmd, "status") != 0) {
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fprintf(stderr, "ERROR: Unknown subcommand: '%s'\n", subcmd);
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usage(2);
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}
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// Initializes a merk repository in the current directory
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if (strcmp(subcmd, "init") == 0) {
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if (argc != 2) {
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printf("ERROR: too many agruments given!\n");
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printf("Usage: merk init");
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exit(1);
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}
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if (mkdir(".merk", 0700) == 0) {
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printf("Initialized merk repository\n");
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}
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if (errno == EEXIST) {
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struct stat st;
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if (stat(".merk", &st) == 0 && S_ISDIR(st.st_mode)) {
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printf("This directory is already a merk repository\n");
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return 0;
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}
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}
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mkdir(".merk/files", 0700);
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mkdir(".merk/trees", 0700);
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mkdir(".merk/branches", 0700);
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}
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// Prints out a visual representation of the diff of the files provided
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else if (strcmp(subcmd, "diff") == 0) {
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if (argc != 4) {
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printf("ERROR: too many/little arguments given!\n");
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printf("Usage: merk diff <PATH> <PATH>");
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exit(1);
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}
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File* file1;
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switch (get_path_type(argv[2])) {
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case PT_FILE: file1 = new_file(argv[2]); break;
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case PT_DIR: file1 = NULL; printf("ERROR: first path is a directory and no file!"); break;
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case PT_NOEXIST: file1 = NULL; printf("ERROR: first path does not exist!"); break;
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default: file1 = NULL; printf("ERROR: unknown first path!");
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}
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if (!file1) exit(1);
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File* file2;
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switch (get_path_type(argv[3])) {
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case PT_FILE: file2 = new_file(argv[3]); break;
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case PT_DIR: file2 = NULL; printf("ERROR: second path is a directory and no file!"); break;
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case PT_NOEXIST: file2 = NULL; printf("ERROR: second path does not exist!"); break;
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default: file2 = NULL; printf("ERROR: unknown second path!");
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}
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if (!file2) exit(1);
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ActionList* actions = myers_diff(file1, file2, 0, 0);
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if (!actions) printf("ERROR: something went wrong while taking the diff!");
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else visualize_diff(file1, file2, actions);
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}
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// Gives a list of untracked files in the repo
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else if (strcmp(subcmd, "status") == 0) {
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if (argc != 2) {
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printf("ERROR: too many arguments given!\n");
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printf("Usage: merk status");
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exit(1);
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}
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PathBuffer* files = new_path_buffer();
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char relative[PATH_MAX] = "";
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char* root = find_root(relative);
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if (!root) {
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free_path_buffer(files);
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return 1;
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}
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walk(root, relative, relative, files);
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printf("Untracked files:\n\n");
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for (size_t i = 0; i < files->len; i++) {
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printf("%s\n", files->paths[i]);
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}
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free_path_buffer(files);
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free(root);
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return 0;
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}
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else {
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usage(1);
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}
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return 0;
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}
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