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/* Prism Versioning
* Copyright 2014 Jeffrey Armstrong <jeff@rainbow-100.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "prism.h"
#include "db.h"
#include "rfile.h"
static void banner()
{
printf("Prism Versioning\nRelease %s\nBy Jeff Armstrong <jeff@rainbow-100.com>\n",VERSION);
}
static void usage(const char *name)
{
banner();
printf("\nUsage: %s <command> ...\n\n", name);
printf("Commands:\n\n");
printf("\tabout\tprints a banner and exits\n");
printf("\tadd\tadds the specified file to the commit queue\n");
printf("\tcommit\tcommits currently queued files\n");
printf("\thash\tdisplays a file's hash\n");
printf("\tinfo\tshow information about repository\n");
printf("\tinit\tinitializes this directory for versioning\n");
printf("\trevert\treverts the specified file to the last revision\n");
printf("\n");
}
static void init_task()
{
printf("Initializing Prism...\n");
switch(initdb()) {
case PRET_EXISTS:
printf(" ERR: already initialized\n");
break;
case PRET_PERMISSION:
printf(" ERR: permissions error\n");
break;
case PRET_ERROR:
printf(" ERR: general error\n");
break;
default:
printf(" OK: initialized\n");
}
}
static void add_task(const char *filename)
{
char new_hash[33];
int res;
struct db_file oldfile;
if(filename == NULL) {
printf("Nothing to do...\n");
return;
}
printf("Adding '%s' to the queue...\n", filename);
res = get_db_fileinfo(filename, &oldfile);
if(res == PRET_NOTTRACKED) {
add_file(filename);
printf(" new file is queued\n");
} else if(res == PRET_OK) {
res = get_file_hash(filename, new_hash);
if(strcmp(oldfile.hash, new_hash) == 0) {
printf(" ERR: %s hasn't changed", filename);
} else {
add_file(filename);
printf(" modified file is queued\n");
}
} else
printf(" ERR: problem retrieving previous hash\n");
}
static void commit_task(const char *message)
{
int fcount;
int rev;
printf("Committing queue...\n");
fcount = disp_queue();
if(fcount <= 0) {
printf(" ERR: no files queued\n");
return;
}
rev = increment_revision();
if(commit_queue(rev) == PRET_OK)
printf(" commit completed\n");
else
printf(" ERR: commit failed\n");
}
static void info_task()
{
int res;
printf("Retrieving Prism information...\n");
res = get_revision();
if(res < 0) {
printf(" ERR: no revision could be retrieved\n");
return;
} else
printf(" current revision: %d\n", res);
res = get_file_count();
if(res < 0) {
printf(" ERR: file count error\n");
return;
} else
printf(" tracking %d files\n", res);
res = disp_queue();
if(res == PRET_READERROR)
printf(" no files in queue\n");
}
static void hash_task(const char *filename)
{
int res;
char hash[33];
memset(hash, 0, 33);
printf("Computing hash for %s...\n", filename);
res = get_file_hash(filename, hash);
if(res == PRET_OK)
printf(" hash: %s\n", hash);
else
printf(" ERR: hash failed\n");
}
static void revert_task(const char *filename)
{
int res;
printf("Reverting changes to %s...\n", filename);
res = revert(filename, -1);
switch(res) {
case PRET_OK:
printf(" changes reverted\n");
break;
case PRET_GZFAILED:
printf(" ERR: decompression failure\n");
break;
case PRET_NOREVISION:
printf(" ERR: no applicable revision found\n");
break;
default:
printf(" ERR: revert failed\n");
}
}
static void diff_task(const char *filename)
{
int res;
printf("Comparing current %s to latest repository revision...\n", filename);
res = diff_db_file(filename, -1);
switch(res) {
case PRET_OK:
printf(" diff complete\n");
break;
case PRET_GZFAILED:
printf(" ERR: decompression failure\n");
break;
case PRET_NOREVISION:
printf(" ERR: no applicable revision found\n");
break;
default:
printf(" ERR: diff failed\n");
}
}
int main(int argc, char *argv[])
{
if(argc == 1) {
usage(argv[0]);
return 0;
}
if(strcmp(argv[1], "about") == 0)
banner();
else if(strcmp(argv[1], "add") == 0 && argc == 3)
add_task(argv[2]);
else if(strcmp(argv[1], "commit") == 0 && argc == 3)
commit_task(argv[2]);
else if(strcmp(argv[1], "commit") == 0)
commit_task(NULL);
else if(strcmp(argv[1], "init") == 0)
init_task();
else if(strcmp(argv[1], "info") == 0)
info_task();
else if(strcmp(argv[1], "hash") == 0 && argc == 3)
hash_task(argv[2]);
else if(strcmp(argv[1], "revert") == 0 && argc == 3)
revert_task(argv[2]);
else if(strcmp(argv[1], "diff") == 0 && argc == 3)
diff_task(argv[2]);
else {
usage(argv[0]);
printf("Error processing command...\n\n");
}
printf("\n");
return 0;
}
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