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feat(cli): added the diff command to display the difference of two files

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lisk77 2025-08-18 16:34:56 +02:00
parent 190aa7cc76
commit c8b4d93c89
2 changed files with 76 additions and 8 deletions
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62
src/main.c
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@ -1,16 +1,62 @@
#include "action_list.h"
#include "file.h"
#include "myers.h"
#include "utilities.h"
// main.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
int main() {
Action act1 = (Action){.type=INSERT, .line_original=0, .line_changed=1};
Action act2 = (Action){.type=DELETE, .line_original=1, .line_changed=2};
static void usage(int exitcode) {
printf("usage: merk <command> [<args>]\n\n diff Displays the difference between the given two files\n");
exit(exitcode);
}
ActionList* list1 = new_list();
add_action(list1, act1);
int main(int argc, char **argv) {
if (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))) {
usage(0);
}
ActionList* list2 = new_list();
add_action(list2, act2);
const char* subcmd = argv[1];
append_list(list1, list2);
if (strcmp(subcmd, "diff") != 0) {
fprintf(stderr, "ERROR: Unknown subcommand: '%s'\n", subcmd);
usage(2);
}
if (strcmp(subcmd, "diff") == 0) {
if (argc != 4) {
printf("ERROR: too many/too little arguments given!\n");
printf("Usage: merk diff <PATH> <PATH>");
exit(1);
}
File* file1;
switch (get_path_type(argv[2])) {
case PT_FILE: file1 = new_file(argv[2]); break;
case PT_DIR: file1 = NULL; printf("ERROR: first path is a directory and no file!"); break;
case PT_NOEXIST: file1 = NULL; printf("ERROR: first path does not exist!"); break;
default: file1 = NULL; printf("ERROR: unknown first path!");
}
if (!file1) exit(1);
File* file2;
switch (get_path_type(argv[3])) {
case PT_FILE: file2 = new_file(argv[3]); break;
case PT_DIR: file2 = NULL; printf("ERROR: second path is a directory and no file!"); break;
case PT_NOEXIST: file2 = NULL; printf("ERROR: second path does not exist!"); break;
default: file2 = NULL; printf("ERROR: unknown second path!");
}
if (!file2) exit(1);
ActionList* actions = myers_diff(file1, file2, 0, 0);
if (!actions) printf("ERROR: something went wrong while taking the diff!");
else visualize_diff(file1, file2, actions);
}
else {
usage(1);
}
return 0;
}