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/* $OpenBSD: diff.c,v 1.97 2006/05/29 07:17:30 joris Exp $ */
/*
* Copyright (c) 2006 Joris Vink <joris@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#include "cvs.h"
#include "diff.h"
#include "log.h"
#include "proto.h"
int cvs_diff(int, char **);
void cvs_diff_local(struct cvs_file *);
static int Nflag = 0;
static char *rev1 = NULL;
static char *rev2 = NULL;
struct cvs_cmd cvs_cmd_diff = {
CVS_OP_DIFF, CVS_REQ_DIFF, "diff",
{ "di", "dif" },
"Show differences between revisions",
"[-cilNnpu] [[-D date] [-r rev] [-D date2 | -r rev2]] "
"[-k mode] [file ...]",
"cD:iklNnpr:Ru",
NULL,
cvs_diff
};
int
cvs_diff(int argc, char **argv)
{
int ch;
char *arg = ".";
int flags;
struct cvs_recursion cr;
flags = CR_RECURSE_DIRS;
strlcpy(diffargs, argv[0], sizeof(diffargs));
while ((ch = getopt(argc, argv, cvs_cmd_diff.cmd_opts)) != -1) {
switch (ch) {
case 'c':
strlcat(diffargs, " -c", sizeof(diffargs));
diff_format = D_CONTEXT;
break;
case 'l':
flags &= ~CR_RECURSE_DIRS;
break;
case 'n':
strlcat(diffargs, " -n", sizeof(diffargs));
diff_format = D_RCSDIFF;
break;
case 'N':
strlcat(diffargs, " -N", sizeof(diffargs));
Nflag = 1;
break;
case 'r':
if (rev1 == NULL) {
rev1 = optarg;
} else if (rev2 == NULL) {
rev2 = optarg;
} else {
fatal("no more than 2 revisions/dates can"
" be specified");
}
break;
case 'u':
strlcat(diffargs, " -u", sizeof(diffargs));
diff_format = D_UNIFIED;
break;
default:
fatal("%s", cvs_cmd_diff.cmd_synopsis);
}
}
argc -= optind;
argv += optind;
cr.enterdir = NULL;
cr.leavedir = NULL;
cr.local = cvs_diff_local;
cr.remote = NULL;
cr.flags = flags;
diff_rev1 = diff_rev2 = NULL;
if (argc > 0)
cvs_file_run(argc, argv, &cr);
else
cvs_file_run(1, &arg, &cr);
return (0);
}
void
cvs_diff_local(struct cvs_file *cf)
{
size_t len;
RCSNUM *r1;
BUF *b1, *b2;
struct stat st;
struct timeval tv[2], tv2[2];
char rbuf[16], p1[MAXPATHLEN], p2[MAXPATHLEN];
cvs_log(LP_TRACE, "cvs_diff_local(%s)", cf->file_path);
if (cf->file_type == CVS_DIR) {
if (verbosity > 1)
cvs_log(LP_NOTICE, "Diffing inside %s", cf->file_path);
return;
}
cvs_file_classify(cf, 0);
if (cf->file_status == FILE_LOST) {
cvs_log(LP_ERR, "cannot find file %s", cf->file_path);
return;
} else if (cf->file_status == FILE_UNKNOWN) {
cvs_log(LP_ERR, "I know nothing about %s", cf->file_path);
return;
} else if (cf->file_status == FILE_ADDED && Nflag == 0) {
cvs_log(LP_ERR, "%s is a new entry, no comparison available",
cf->file_path);
return;
} else if (cf->file_status == FILE_REMOVED && Nflag == 0) {
cvs_log(LP_ERR, "%s was removed, no comparison available",
cf->file_path);
return;
} else if (cf->file_status == FILE_UPTODATE && rev2 == NULL) {
return;
}
if (rev1 != NULL)
diff_rev1 = rcs_translate_tag(rev1, cf->file_rcs);
if (rev2 != NULL)
diff_rev2 = rcs_translate_tag(rev2, cf->file_rcs);
diff_file = cf->file_path;
cvs_printf("Index: %s\n%s\nRCS file: %s\n", cf->file_path,
RCS_DIFF_DIV, cf->file_rpath);
if (cf->file_status != FILE_ADDED) {
if (diff_rev1 != NULL)
r1 = diff_rev1;
else
r1 = cf->file_ent->ce_rev;
diff_rev1 = r1;
rcsnum_tostr(r1, rbuf , sizeof(rbuf));
cvs_printf("retrieving revision %s\n", rbuf);
if ((b1 = rcs_getrev(cf->file_rcs, r1)) == NULL)
fatal("failed to retrieve revision %s", rbuf);
b1 = rcs_kwexp_buf(b1, cf->file_rcs, r1);
tv[0].tv_sec = rcs_rev_getdate(cf->file_rcs, r1);
tv[0].tv_usec = 0;
tv[1] = tv[0];
}
if (diff_rev2 != NULL && cf->file_status != FILE_ADDED &&
cf->file_status != FILE_REMOVED) {
rcsnum_tostr(diff_rev2, rbuf, sizeof(rbuf));
cvs_printf("retrieving revision %s\n", rbuf);
if ((b2 = rcs_getrev(cf->file_rcs, diff_rev2)) == NULL)
fatal("failed to retrieve revision %s", rbuf);
b2 = rcs_kwexp_buf(b2, cf->file_rcs, diff_rev2);
tv2[0].tv_sec = rcs_rev_getdate(cf->file_rcs, diff_rev2);
tv2[0].tv_usec = 0;
tv2[1] = tv2[0];
} else if (cf->file_status != FILE_REMOVED) {
if (fstat(cf->fd, &st) == -1)
fatal("fstat failed %s", strerror(errno));
if ((b2 = cvs_buf_load(cf->file_path, BUF_AUTOEXT)) == NULL)
fatal("failed to load %s", cf->file_path);
st.st_mtime = cvs_hack_time(st.st_mtime, 1);
if (st.st_mtime == 0)
fatal("cvs_diff_local: to gmt failed");
tv2[0].tv_sec = st.st_mtime;
tv2[0].tv_usec = 0;
tv2[1] = tv2[0];
}
cvs_printf("%s", diffargs);
if (cf->file_status != FILE_ADDED) {
rcsnum_tostr(r1, rbuf, sizeof(rbuf));
cvs_printf(" -r%s", rbuf);
if (diff_rev2 != NULL) {
rcsnum_tostr(diff_rev2, rbuf, sizeof(rbuf));
cvs_printf(" -r%s", rbuf);
}
}
cvs_printf(" %s\n", cf->file_path);
if (cf->file_status != FILE_ADDED) {
len = strlcpy(p1, cvs_tmpdir, sizeof(p1));
if (len >= sizeof(p1))
fatal("cvs_diff_local: truncation");
len = strlcat(p1, "/diff1.XXXXXXXXXX", sizeof(p1));
if (len >= sizeof(p1))
fatal("cvs_diff_local: truncation");
cvs_buf_write_stmp(b1, p1, 0600, tv);
cvs_buf_free(b1);
} else {
len = strlcpy(p1, CVS_PATH_DEVNULL, sizeof(p1));
if (len >= sizeof(p1))
fatal("cvs_diff_local: truncation");
}
if (cf->file_status != FILE_REMOVED) {
len = strlcpy(p2, cvs_tmpdir, sizeof(p2));
if (len >= sizeof(p2))
fatal("cvs_diff_local: truncation");
len = strlcat(p2, "/diff2.XXXXXXXXXX", sizeof(p2));
if (len >= sizeof(p2))
fatal("cvs_diff_local: truncation");
cvs_buf_write_stmp(b2, p2, 0600, tv2);
cvs_buf_free(b2);
} else {
len = strlcpy(p2, CVS_PATH_DEVNULL, sizeof(p2));
if (len >= sizeof(p2))
fatal("cvs_diff_local: truncation");
}
cvs_diffreg(p1, p2, NULL);
cvs_worklist_run(&temp_files, cvs_worklist_unlink);
diff_rev1 = diff_rev2 = NULL;
}
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