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tag.c
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1996-09-28
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23KB
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933 lines
/*
* Copyright (c) 1992, Brian Berliner and Jeff Polk
* Copyright (c) 1989-1992, Brian Berliner
*
* You may distribute under the terms of the GNU General Public License as
* specified in the README file that comes with the CVS 1.4 kit.
*
* Tag
*
* Add or delete a symbolic name to an RCS file, or a collection of RCS files.
* Uses the checked out revision in the current directory.
*/
#include "cvs.h"
#include "savecwd.h"
static int check_fileproc PROTO ((void *callerdat, struct file_info *finfo));
static int check_filesdoneproc PROTO ((void *callerdat, int err,
char *repos, char *update_dir,
List *entries));
static int pretag_proc PROTO((char *repository, char *filter));
static void masterlist_delproc PROTO((Node *p));
static void tag_delproc PROTO((Node *p));
static int pretag_list_proc PROTO((Node *p, void *closure));
static Dtype tag_dirproc PROTO ((void *callerdat, char *dir,
char *repos, char *update_dir,
List *entries));
static int tag_fileproc PROTO ((void *callerdat, struct file_info *finfo));
static int tag_filesdoneproc PROTO ((void *callerdat, int err,
char *repos, char *update_dir,
List *entries));
static char *numtag;
static char *date = NULL;
static char *symtag;
static int delete_flag; /* adding a tag by default */
static int branch_mode; /* make an automagic "branch" tag */
static int local; /* recursive by default */
static int force_tag_match = 1; /* force tag to match by default */
static int force_tag_move; /* don't force tag to move by default */
static int check_uptodate; /* no uptodate-check by default */
struct tag_info
{
Ctype status;
char *rev;
char *tag;
char *options;
};
struct master_lists
{
List *tlist;
};
static List *mtlist;
static List *tlist;
static const char *const tag_usage[] =
{
"Usage: %s %s [-lRF] [-b] [-d] [-c] [-r tag|-D date] tag [files...]\n",
"\t-l\tLocal directory only, not recursive.\n",
"\t-R\tProcess directories recursively.\n",
"\t-d\tDelete the given tag.\n",
"\t-[rD]\tExisting tag or date.\n",
"\t-f\tForce a head revision if specified tag not found.\n",
"\t-b\tMake the tag a \"branch\" tag, allowing concurrent development.\n",
"\t-F\tMove tag if it already exists.\n",
"\t-c\tCheck that working files are unmodified.\n",
NULL
};
int
tag (argc, argv)
int argc;
char **argv;
{
int c;
int err = 0;
if (argc == -1)
usage (tag_usage);
optind = 1;
while ((c = getopt (argc, argv, "FQqlRcdr:D:bf")) != -1)
{
switch (c)
{
case 'Q':
case 'q':
#ifdef SERVER_SUPPORT
/* The CVS 1.5 client sends these options (in addition to
Global_option requests), so we must ignore them. */
if (!server_active)
#endif
error (1, 0,
"-q or -Q must be specified before \"%s\"",
command_name);
break;
case 'l':
local = 1;
break;
case 'R':
local = 0;
break;
case 'd':
delete_flag = 1;
break;
case 'c':
check_uptodate = 1;
break;
case 'r':
numtag = optarg;
break;
case 'D':
if (date)
free (date);
date = Make_Date (optarg);
break;
case 'f':
force_tag_match = 0;
break;
case 'b':
branch_mode = 1;
break;
case 'F':
force_tag_move = 1;
break;
case '?':
default:
usage (tag_usage);
break;
}
}
argc -= optind;
argv += optind;
if (argc == 0)
usage (tag_usage);
symtag = argv[0];
argc--;
argv++;
if (date && numtag)
error (1, 0, "-r and -D options are mutually exclusive");
if (delete_flag && branch_mode)
error (0, 0, "warning: -b ignored with -d options");
RCS_check_tag (symtag);
#ifdef CLIENT_SUPPORT
if (client_active)
{
/* We're the client side. Fire up the remote server. */
start_server ();
ign_setup ();
if (local)
send_arg("-l");
if (delete_flag)
send_arg("-d");
if (check_uptodate)
send_arg("-c");
if (branch_mode)
send_arg("-b");
if (force_tag_move)
send_arg("-F");
if (numtag)
option_with_arg ("-r", numtag);
if (date)
client_senddate (date);
send_arg (symtag);
send_file_names (argc, argv, SEND_EXPAND_WILD);
/* FIXME: We shouldn't have to send current files, but I'm not sure
whether it works. So send the files --
it's slower but it works. */
send_files (argc, argv, local, 0);
send_to_server ("tag\012", 0);
return get_responses_and_close ();
}
#endif
if (numtag != NULL)
tag_check_valid (numtag, argc, argv, local, 0, "");
/* check to make sure they are authorized to tag all the
specified files in the repository */
mtlist = getlist();
err = start_recursion (check_fileproc, check_filesdoneproc,
(DIRENTPROC) NULL, (DIRLEAVEPROC) NULL, NULL,
argc, argv, local, W_LOCAL, 0, 1,
(char *) NULL, 1);
if (err)
{
error (1, 0, "correct the above errors first!");
}
/* start the recursion processor */
err = start_recursion (tag_fileproc, tag_filesdoneproc, tag_dirproc,
(DIRLEAVEPROC) NULL, NULL, argc, argv, local,
W_LOCAL, 0, 0, (char *) NULL, 1);
dellist(&mtlist);
return (err);
}
/* check file that is to be tagged */
/* All we do here is add it to our list */
static int
check_fileproc (callerdat, finfo)
void *callerdat;
struct file_info *finfo;
{
char *xdir;
Node *p;
Vers_TS *vers;
if (check_uptodate)
{
Ctype status = Classify_File (finfo, (char *) NULL, (char *) NULL,
(char *) NULL, 1, 0, &vers, 0);
if ((status != T_UPTODATE) && (status != T_CHECKOUT))
{
error (0, 0, "%s is locally modified", finfo->fullname);
return (1);
}
}
if (finfo->update_dir[0] == '\0')
xdir = ".";
else
xdir = finfo->update_dir;
if ((p = findnode (mtlist, xdir)) != NULL)
{
tlist = ((struct master_lists *) p->data)->tlist;
}
else
{
struct master_lists *ml;
tlist = getlist ();
p = getnode ();
p->key = xstrdup (xdir);
p->type = UPDATE;
ml = (struct master_lists *)
xmalloc (sizeof (struct master_lists));
ml->tlist = tlist;
p->data = (char *) ml;
p->delproc = masterlist_delproc;
(void) addnode (mtlist, p);
}
/* do tlist */
p = getnode ();
p->key = xstrdup (finfo->file);
p->type = UPDATE;
p->delproc = tag_delproc;
vers = Version_TS (finfo, NULL, NULL, NULL, 0, 0);
if (vers->srcfile == NULL)
{
if (!really_quiet)
error (0, 0, "nothing known about %s", finfo->file);
return (1);
}
p->data = RCS_getversion(vers->srcfile, numtag, date, force_tag_match, 0);
if (p->data != NULL)
{
int addit = 1;
char *oversion;
oversion = RCS_getversion (vers->srcfile, symtag, (char *) NULL, 1, 0);
if (oversion == NULL)
{
if (delete_flag)
{
addit = 0;
}
}
else if (strcmp(oversion, p->data) == 0)
{
addit = 0;
}
else if (!force_tag_move)
{
addit = 0;
}
if (oversion != NULL)
{
free(oversion);
}
if (!addit)
{
free(p->data);
p->data = NULL;
}
}
freevers_ts(&vers);
(void) addnode (tlist, p);
return (0);
}
static int
check_filesdoneproc (callerdat, err, repos, update_dir, entries)
void *callerdat;
int err;
char *repos;
char *update_dir;
List *entries;
{
int n;
Node *p;
p = findnode(mtlist, update_dir);
if (p != NULL)
{
tlist = ((struct master_lists *) p->data)->tlist;
}
else
{
tlist = (List *) NULL;
}
if ((tlist == NULL) || (tlist->list->next == tlist->list))
{
return (err);
}
if ((n = Parse_Info(CVSROOTADM_TAGINFO, repos, pretag_proc, 1)) > 0)
{
error (0, 0, "Pre-tag check failed");
err += n;
}
return (err);
}
static int
pretag_proc(repository, filter)
char *repository;
char *filter;
{
if (filter[0] == '/')
{
char *s, *cp;
s = xstrdup(filter);
for (cp=s; *cp; cp++)
{
if (isspace(*cp))
{
*cp = '\0';
break;
}
}
if (!isfile(s))
{
error (0, errno, "cannot find pre-tag filter '%s'", s);
free(s);
return (1);
}
free(s);
}
run_setup("%s %s %s %s",
filter,
symtag,
delete_flag ? "del" : force_tag_move ? "mov" : "add",
repository);
walklist(tlist, pretag_list_proc, NULL);
return (run_exec(RUN_TTY, RUN_TTY, RUN_TTY, RUN_NORMAL|RUN_REALLY));
}
static void
masterlist_delproc(p)
Node *p;
{
struct master_lists *ml;
ml = (struct master_lists *)p->data;
dellist(&ml->tlist);
free(ml);
return;
}
static void
tag_delproc(p)
Node *p;
{
if (p->data != NULL)
{
free(p->data);
p->data = NULL;
}
return;
}
static int
pretag_list_proc(p, closure)
Node *p;
void *closure;
{
if (p->data != NULL)
{
run_arg(p->key);
run_arg(p->data);
}
return (0);
}
/*
* Called to tag a particular file (the currently checked out version is
* tagged with the specified tag - or the specified tag is deleted).
*/
/* ARGSUSED */
static int
tag_fileproc (callerdat, finfo)
void *callerdat;
struct file_info *finfo;
{
char *version, *oversion;
char *nversion = NULL;
char *rev;
Vers_TS *vers;
int retcode = 0;
/* Lock the directory if it is not already locked. We can't rely
on tag_dirproc because it won't handle the case where the user
specifies a list of files on the command line. */
tag_lockdir (finfo->repository);
vers = Version_TS (finfo, NULL, NULL, NULL, 0, 0);
if ((numtag != NULL) || (date != NULL))
{
nversion = RCS_getversion(vers->srcfile,
numtag,
date,
force_tag_match, 0);
if (nversion == NULL)
{
freevers_ts (&vers);
return (0);
}
}
if (delete_flag)
{
/*
* If -d is specified, "force_tag_match" is set, so that this call to
* RCS_getversion() will return a NULL version string if the symbolic
* tag does not exist in the RCS file.
*
* This is done here because it's MUCH faster than just blindly calling
* "rcs" to remove the tag... trust me.
*/
version = RCS_getversion (vers->srcfile, symtag, (char *) NULL, 1, 0);
if (version == NULL || vers->srcfile == NULL)
{
freevers_ts (&vers);
return (0);
}
free (version);
if ((retcode = RCS_deltag(vers->srcfile->path, symtag, 1)) != 0)
{
if (!quiet)
error (0, retcode == -1 ? errno : 0,
"failed to remove tag %s from %s", symtag,
vers->srcfile->path);
freevers_ts (&vers);
return (1);
}
/* warm fuzzies */
if (!really_quiet)
{
(void) printf ("D %s\n", finfo->fullname);
}
freevers_ts (&vers);
return (0);
}
/*
* If we are adding a tag, we need to know which version we have checked
* out and we'll tag that version.
*/
if (nversion == NULL)
{
version = vers->vn_user;
}
else
{
version = nversion;
}
if (version == NULL)
{
freevers_ts (&vers);
return (0);
}
else if (strcmp (version, "0") == 0)
{
if (!quiet)
error (0, 0, "couldn't tag added but un-commited file `%s'", finfo->file);
freevers_ts (&vers);
return (0);
}
else if (version[0] == '-')
{
if (!quiet)
error (0, 0, "skipping removed but un-commited file `%s'", finfo->file);
freevers_ts (&vers);
return (0);
}
else if (vers->srcfile == NULL)
{
if (!quiet)
error (0, 0, "cannot find revision control file for `%s'", finfo->file);
freevers_ts (&vers);
return (0);
}
/*
* As an enhancement for the case where a tag is being re-applied to a
* large number of files, make one extra call to RCS_getversion to see
* if the tag is already set in the RCS file. If so, check to see if it
* needs to be moved. If not, do nothing. This will likely save a lot of
* time when simply moving the tag to the "current" head revisions of a
* module -- which I have found to be a typical tagging operation.
*/
rev = branch_mode ? RCS_magicrev (vers->srcfile, version) : version;
oversion = RCS_getversion (vers->srcfile, symtag, (char *) NULL, 1, 0);
if (oversion != NULL)
{
int isbranch = RCS_isbranch (finfo->rcs, symtag);
/*
* if versions the same and neither old or new are branches don't have
* to do anything
*/
if (strcmp (version, oversion) == 0 && !branch_mode && !isbranch)
{
free (oversion);
freevers_ts (&vers);
return (0);
}
if (!force_tag_move)
{
/* we're NOT going to move the tag */
(void) printf ("W %s", finfo->fullname);
(void) printf (" : %s already exists on %s %s",
symtag, isbranch ? "branch" : "version", oversion);
(void) printf (" : NOT MOVING tag to %s %s\n",
branch_mode ? "branch" : "version", rev);
free (oversion);
freevers_ts (&vers);
return (0);
}
free (oversion);
}
if ((retcode = RCS_settag(vers->srcfile->path, symtag, rev)) != 0)
{
error (1, retcode == -1 ? errno : 0,
"failed to set tag %s to revision %s in %s",
symtag, rev, vers->srcfile->path);
freevers_ts (&vers);
return (1);
}
/* more warm fuzzies */
if (!really_quiet)
{
(void) printf ("T %s\n", finfo->fullname);
}
if (nversion != NULL)
{
free (nversion);
}
freevers_ts (&vers);
return (0);
}
/* Clear any lock we may hold on the current directory. */
static int
tag_filesdoneproc (callerdat, err, repos, update_dir, entries)
void *callerdat;
int err;
char *repos;
char *update_dir;
List *entries;
{
tag_unlockdir ();
return (err);
}
/*
* Print a warm fuzzy message
*/
/* ARGSUSED */
static Dtype
tag_dirproc (callerdat, dir, repos, update_dir, entries)
void *callerdat;
char *dir;
char *repos;
char *update_dir;
List *entries;
{
if (!quiet)
error (0, 0, "%s %s", delete_flag ? "Untagging" : "Tagging", update_dir);
return (R_PROCESS);
}
/* We do not need to acquire a full write lock for the tag operation:
the revisions are obtained from the working directory, so we do not
require consistency across the entire repository. However, we do
need to prevent simultaneous tag operations from interfering with
each other. Therefore, we write lock each directory as we enter
it, and unlock it as we leave it.
In the rtag case, it would be nice to provide consistency with
respect to commits; however CVS lacks the infrastructure to do that
(see Concurrency in cvs.texinfo and comment in do_recursion). We
can and will prevent simultaneous tag operations from interfering
with each other, by write locking each directory as we enter it,
and unlocking it as we leave it. */
static char *locked_dir;
static List *locked_list;
/*
* Lock the directory for a tag operation. This is also called by the
* rtag code.
*/
void
tag_lockdir (repository)
char *repository;
{
if (repository != NULL
&& (locked_dir == NULL
|| strcmp (locked_dir, repository) != 0))
{
Node *node;
if (locked_dir != NULL)
tag_unlockdir ();
locked_dir = xstrdup (repository);
locked_list = getlist ();
node = getnode ();
node->type = LOCK;
node->key = xstrdup (repository);
(void) addnode (locked_list, node);
Writer_Lock (locked_list);
}
}
/*
* Unlock the directory for a tag operation. This is also called by
* the rtag code.
*/
void
tag_unlockdir ()
{
if (locked_dir != NULL)
{
Lock_Cleanup ();
dellist (&locked_list);
free (locked_dir);
locked_dir = NULL;
locked_list = NULL;
}
}
/* Code relating to the val-tags file. Note that this file has no way
of knowing when a tag has been deleted. The problem is that there
is no way of knowing whether a tag still exists somewhere, when we
delete it some places. Using per-directory val-tags files (in
CVSREP) might be better, but that might slow down the process of
verifying that a tag is correct (maybe not, for the likely cases,
if carefully done), and/or be harder to implement correctly. */
struct val_args {
char *name;
int found;
};
static int val_fileproc PROTO ((void *callerdat, struct file_info *finfo));
static int
val_fileproc (callerdat, finfo)
void *callerdat;
struct file_info *finfo;
{
RCSNode *rcsdata;
struct val_args *args = (struct val_args *)callerdat;
char *tag;
if ((rcsdata = finfo->rcs) == NULL)
/* Not sure this can happen, after all we passed only
W_REPOS | W_ATTIC. */
return 0;
tag = RCS_gettag (rcsdata, args->name, 1, 0);
if (tag != NULL)
{
/* FIXME: should find out a way to stop the search at this point. */
args->found = 1;
free (tag);
}
return 0;
}
static Dtype val_direntproc PROTO ((void *, char *, char *, char *, List *));
static Dtype
val_direntproc (callerdat, dir, repository, update_dir, entries)
void *callerdat;
char *dir;
char *repository;
char *update_dir;
List *entries;
{
/* This is not quite right--it doesn't get right the case of "cvs
update -d -r foobar" where foobar is a tag which exists only in
files in a directory which does not exist yet, but which is
about to be created. */
if (isdir (dir))
return 0;
return R_SKIP_ALL;
}
/* Check to see whether NAME is a valid tag. If so, return. If not
print an error message and exit. ARGC, ARGV, LOCAL, and AFLAG specify
which files we will be operating on.
REPOSITORY is the repository if we need to cd into it, or NULL if
we are already there, or "" if we should do a W_LOCAL recursion.
Sorry for three cases, but the "" case is needed in case the
working directories come from diverse parts of the repository, the
NULL case avoids an unneccesary chdir, and the non-NULL, non-""
case is needed for checkout, where we don't want to chdir if the
tag is found in CVSROOTADM_VALTAGS, but there is not (yet) any
local directory. */
void
tag_check_valid (name, argc, argv, local, aflag, repository)
char *name;
int argc;
char **argv;
int local;
int aflag;
char *repository;
{
DBM *db;
char *valtags_filename;
int err;
datum mytag;
struct val_args the_val_args;
struct saved_cwd cwd;
int which;
/* Numeric tags require only a syntactic check. */
if (isdigit (name[0]))
{
char *p;
for (p = name; *p != '\0'; ++p)
{
if (!(isdigit (*p) || *p == '.'))
error (1, 0, "\
Numeric tag %s contains characters other than digits and '.'", name);
}
return;
}
/* Special tags are always valid. */
if (strcmp (name, TAG_BASE) == 0
|| strcmp (name, TAG_HEAD) == 0)
return;
mytag.dptr = name;
mytag.dsize = strlen (name);
valtags_filename = xmalloc (strlen (CVSroot_directory)
+ sizeof CVSROOTADM
+ sizeof CVSROOTADM_VALTAGS + 20);
strcpy (valtags_filename, CVSroot_directory);
strcat (valtags_filename, "/");
strcat (valtags_filename, CVSROOTADM);
strcat (valtags_filename, "/");
strcat (valtags_filename, CVSROOTADM_VALTAGS);
db = dbm_open (valtags_filename, O_RDWR, 0666);
if (db == NULL)
{
if (!existence_error (errno))
error (1, errno, "cannot read %s", valtags_filename);
/* If the file merely fails to exist, we just keep going and create
it later if need be. */
}
else
{
datum val;
val = dbm_fetch (db, mytag);
if (val.dptr != NULL)
{
/* Found. The tag is valid. */
dbm_close (db);
free (valtags_filename);
return;
}
/* FIXME: should check errors somehow (add dbm_error to myndbm.c?). */
}
/* We didn't find the tag in val-tags, so look through all the RCS files
to see whether it exists there. Yes, this is expensive, but there
is no other way to cope with a tag which might have been created
by an old version of CVS, from before val-tags was invented.
Since we need this code anyway, we also use it to create
entries in val-tags in general (that is, the val-tags entry
will get created the first time the tag is used, not when the
tag is created). */
the_val_args.name = name;
the_val_args.found = 0;
which = W_REPOS | W_ATTIC;
if (repository != NULL)
{
if (repository[0] == '\0')
which |= W_LOCAL;
else
{
if (save_cwd (&cwd))
exit (EXIT_FAILURE);
if ( CVS_CHDIR (repository) < 0)
error (1, errno, "cannot change to %s directory", repository);
}
}
err = start_recursion (val_fileproc, (FILESDONEPROC) NULL,
val_direntproc, (DIRLEAVEPROC) NULL,
(void *)&the_val_args,
argc, argv, local, which, aflag,
1, NULL, 1);
if (repository != NULL && repository[0] != '\0')
{
if (restore_cwd (&cwd, NULL))
exit (EXIT_FAILURE);
free_cwd (&cwd);
}
if (!the_val_args.found)
error (1, 0, "no such tag %s", name);
else
{
/* The tags is valid but not mentioned in val-tags. Add it. */
datum value;
if (noexec)
{
if (db != NULL)
dbm_close (db);
free (valtags_filename);
return;
}
if (db == NULL)
{
mode_t omask;
omask = umask (cvsumask);
db = dbm_open (valtags_filename, O_RDWR | O_CREAT | O_TRUNC, 0666);
(void) umask (omask);
if (db == NULL)
{
error (0, errno, "cannot create %s", valtags_filename);
free (valtags_filename);
return;
}
}
value.dptr = "y";
value.dsize = 1;
if (dbm_store (db, mytag, value, DBM_REPLACE) < 0)
error (0, errno, "cannot store %s into %s", name,
valtags_filename);
dbm_close (db);
}
free (valtags_filename);
}
/*
* Check whether a join tag is valid. This is just like
* tag_check_valid, but we must stop before the colon if there is one.
*/
void
tag_check_valid_join (join_tag, argc, argv, local, aflag, repository)
char *join_tag;
int argc;
char **argv;
int local;
int aflag;
char *repository;
{
char *c, *s;
c = xstrdup (join_tag);
s = strchr (c, ':');
if (s != NULL)
{
if (isdigit (join_tag[0]))
error (1, 0,
"Numeric join tag %s may not contain a date specifier",
join_tag);
*s = '\0';
}
tag_check_valid (c, argc, argv, local, aflag, repository);
free (c);
}