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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "later.h"
LaterItem_t* new_item() {
LaterItem_t* item = (LaterItem_t*)malloc(sizeof(LaterItem_t));
item->directory = NULL;
item->path = NULL;
item->command = NULL;
return item;
}
LaterFile_t* new_LaterFile() {
LaterFile_t* file = (LaterFile_t*)malloc(sizeof(LaterFile_t));
file->filename = NULL;
file->file = NULL;
file->capacity = 8;
file->items = (LaterItem_t**)malloc(sizeof(LaterItem_t*) * file->capacity);
file->size = 0;
file->loaded = false;
file->modified = false;
return file;
}
bool build_LaterFile(LaterFile_t* file, char* laterfile_path) {
// open the file for reading/appending (so it gets created if necessary)
FILE* laterfile = fopen(laterfile_path, "a+");
fseek(laterfile, 0, SEEK_END);
int filesize = ftell(laterfile);
rewind(laterfile);
file->filename = laterfile_path;
file->file = laterfile;
// if the file is empty, we're done
if (filesize == 0) {
printf("empty file!\n");
return true;
}
// start reading in entries
char buf[2048];
char* ret;
LaterItem_t* curitem = NULL;
while (true) {
// get the next line
ret = fgets(buf, sizeof(buf), laterfile);
if (ret == NULL) {
break;
} else if (ret[strlen(ret)-1] == '\n') {
ret[strlen(ret)-1] = '\0';
}
// are we starting a new item?
if (curitem == NULL) {
curitem = new_item();
}
// if we've reached the end of a definition
if (strcmp(ret, "--") == 0) {
file->items[file->size] = curitem;
file->size++;
curitem = NULL;
} else if (strncmp(ret, "DIR ", 4) == 0) {
// directory
curitem->directory = strdup(ret+4);
} else if (strncmp(ret, "PATH ", 5) == 0) {
//path
curitem->path = strdup(ret+5);
} else if (strncmp(ret, "DO ", 3) == 0) {
// command
curitem->command = strdup(ret+3);
} else {
// fallthrough
printf("unrecognized: %s\n", ret);
break;
}
}
if (curitem != NULL) {
free(curitem);
return false;
}
return true;
}
void add_item(LaterFile_t* file, LaterItem_t* item) {
// TODO capacity things
file->items[file->size] = item;
file->size++;
file->modified = true;
}
void free_LaterFile(LaterFile_t* file) {
fclose(file->file);
LaterItem_t* cur;
for (int i = 0; i < file->capacity; i++) {
cur = file->items[i];
if (cur != NULL) {
free(cur);
}
}
}
void free_item(LaterItem_t* item) {
if (item->directory) free(item->directory);
if (item->path) free(item->path);
if (item->command) free(item->command);
free(item);
}
void build_item(LaterItem_t* item, char** raw_command, int raw_command_length) {
// get the current directory
char directory[255];
getcwd(directory, sizeof(directory)-1);
item->directory = strdup(directory);
// get the current path
char* path = getenv("PATH");
item->path = path;
// copy the command
char* command = (char*)malloc(2048);
int command_idx = 0;
char* cur;
for (int raw_idx = 0; raw_idx < raw_command_length; raw_idx++) {
cur = raw_command[raw_idx];
command_idx += strlen(cur);
strcat(command, cur);
command[command_idx] = ' ';
command_idx++;
}
item->command = command;
}
void debug_item(LaterItem_t* item) {
/*
* Format:
* DIR <pwd>
* PATH <path>
* DO <command>
* --
*/
printf("DIR %s\nPATH %s\nDO %s\n--\n", item->directory, item->path, item->command);
}
void write_file(LaterFile_t* file) {
// reopen the file for writing
FILE* newfp = freopen(file->filename, "w", file->file);
LaterItem_t* curitem;
for (int i = 0; i < file->size; i++) {
curitem = file->items[i];
fprintf(newfp, "DIR %s\nPATH %s\nDO %s\n--\n", curitem->directory, curitem->path, curitem->command);
}
}
int main(int argc, char** argv) {
/* how it could work
* - read in tokens
* - wait for --
* - after --, read everything in and save to the LATERFILE
* - make sure to also save the PWD
*/
char* laterfile_path = getenv("LATERFILE");
if (!laterfile_path || strlen(laterfile_path) == 0) {
printf("where's your LATERFILE?\n");
return 1;
}
LaterFile_t* file = new_LaterFile();
bool ret = build_LaterFile(file, laterfile_path);
if (!ret) {
printf("couldn't build file, exiting\n");
return 1;
}
// debug the existing file
LaterItem_t* cur;
for (int i = 0; i < file->size; i++) {
cur = file->items[i];
debug_item(cur);
}
// loop through the arguments
int argi = 1;
while (argi < argc && strncmp(argv[argi], "--", 2) != 0)
argi++;
if (argi == argc) {
printf("unrecognized arguments\n");
free(file);
return 1;
}
argi++; // go past the --
// build new item
cur = new_item();
build_item(cur, argv+argi, argc-argi);
add_item(file, cur);
// write the file if necessary
if (file->modified)
write_file(file);
// cleanup
free(file);
return 0;
}
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