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#include"cache.h"
#include"lockfile.h"
#include"bundle.h"
#include"object.h"
#include"commit.h"
#include"diff.h"
#include"revision.h"
#include"list-objects.h"
#include"run-command.h"
#include"refs.h"
#include"argv-array.h"
staticconstcharbundle_signature[] ="# v2 git bundle\n";
staticvoidadd_to_ref_list(constunsigned char*sha1, constchar*name,
structref_list*list)
{
ALLOC_GROW(list->list, list->nr+1, list->alloc);
hashcpy(list->list[list->nr].sha1, sha1);
list->list[list->nr].name=xstrdup(name);
list->nr++;
}
staticintparse_bundle_header(intfd, structbundle_header*header,
constchar*report_path)
{
structstrbufbuf=STRBUF_INIT;
intstatus=0;
/* The bundle header begins with the signature */
if (strbuf_getwholeline_fd(&buf, fd, '\n') ||
strcmp(buf.buf, bundle_signature)) {
if (report_path)
error(_("'%s' does not look like a v2 bundle file"),
report_path);
status=-1;
goto abort;
}
/* The bundle header ends with an empty line */
while (!strbuf_getwholeline_fd(&buf, fd, '\n') &&
buf.len&&buf.buf[0] !='\n') {
unsigned charsha1[20];
intis_prereq=0;
if (*buf.buf=='-') {
is_prereq=1;
strbuf_remove(&buf, 0, 1);
}
strbuf_rtrim(&buf);
/*
* Tip lines have object name, SP, and refname.
* Prerequisites have object name that is optionally
* followed by SP and subject line.
*/
if (get_sha1_hex(buf.buf, sha1) ||
(buf.len>40&& !isspace(buf.buf[40])) ||
(!is_prereq&&buf.len <= 40)) {
if (report_path)
error(_("unrecognized header: %s%s (%d)"),
(is_prereq ? "-" : ""), buf.buf, (int)buf.len);
status=-1;
break;
} else {
if (is_prereq)
add_to_ref_list(sha1, "", &header->prerequisites);
else
add_to_ref_list(sha1, buf.buf+41, &header->references);
}
}
abort:
if (status) {
close(fd);
fd=-1;
}
strbuf_release(&buf);
returnfd;
}
intread_bundle_header(constchar*path, structbundle_header*header)
{
intfd=open(path, O_RDONLY);
if (fd<0)
returnerror(_("could not open '%s'"), path);
returnparse_bundle_header(fd, header, path);
}
intis_bundle(constchar*path, intquiet)
{
structbundle_headerheader;
intfd=open(path, O_RDONLY);
if (fd<0)
return0;
memset(&header, 0, sizeof(header));
fd=parse_bundle_header(fd, &header, quiet ? NULL : path);
if (fd >= 0)
close(fd);
return (fd >= 0);
}
staticintlist_refs(structref_list*r, intargc, constchar**argv)
{
inti;
for (i=0; i<r->nr; i++) {
if (argc>1) {
intj;
for (j=1; j<argc; j++)
if (!strcmp(r->list[i].name, argv[j]))
break;
if (j==argc)
continue;
}
printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
r->list[i].name);
}
return0;
}
/* Remember to update object flag allocation in object.h */
#definePREREQ_MARK (1u<<16)
intverify_bundle(structbundle_header*header, intverbose)
{
/*
* Do fast check, then if any prereqs are missing then go line by line
* to be verbose about the errors
*/
structref_list*p=&header->prerequisites;
structrev_inforevs;
constchar*argv[] = {NULL, "--all", NULL};
structobject_arrayrefs;
structcommit*commit;
inti, ret=0, req_nr;
constchar*message=_("Repository lacks these prerequisite commits:");
init_revisions(&revs, NULL);
for (i=0; i<p->nr; i++) {
structref_list_entry*e=p->list+i;
structobject*o=parse_object(e->sha1);
if (o) {
o->flags |= PREREQ_MARK;
add_pending_object(&revs, o, e->name);
continue;
}
if (++ret==1)
error("%s", message);
error("%s %s", sha1_to_hex(e->sha1), e->name);
}
if (revs.pending.nr!=p->nr)
returnret;
req_nr=revs.pending.nr;
setup_revisions(2, argv, &revs, NULL);
refs=revs.pending;
revs.leak_pending=1;
if (prepare_revision_walk(&revs))
die(_("revision walk setup failed"));
i=req_nr;
while (i&& (commit=get_revision(&revs)))
if (commit->object.flags&PREREQ_MARK)
i--;
for (i=0; i<req_nr; i++)
if (!(refs.objects[i].item->flags&SHOWN)) {
if (++ret==1)
error("%s", message);
error("%s %s", sha1_to_hex(refs.objects[i].item->sha1),
refs.objects[i].name);
}
clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS);
free(refs.objects);
if (verbose) {
structref_list*r;
r=&header->references;
printf_ln(Q_("The bundle contains this ref:",
"The bundle contains these %d refs:",
r->nr),
r->nr);
list_refs(r, 0, NULL);
r=&header->prerequisites;
if (!r->nr) {
printf_ln(_("The bundle records a complete history."));
} else {
printf_ln(Q_("The bundle requires this ref:",
"The bundle requires these %d refs:",
r->nr),
r->nr);
list_refs(r, 0, NULL);
}
}
returnret;
}
intlist_bundle_refs(structbundle_header*header, intargc, constchar**argv)
{
returnlist_refs(&header->references, argc, argv);
}
staticintis_tag_in_date_range(structobject*tag, structrev_info*revs)
{
unsigned longsize;
enumobject_typetype;
char*buf=NULL, *line, *lineend;
unsigned longdate;
intresult=1;
if (revs->max_age==-1&&revs->min_age==-1)
goto out;
buf=read_sha1_file(tag->sha1, &type, &size);
if (!buf)
goto out;
line=memmem(buf, size, "\ntagger ", 8);
if (!line++)
goto out;
lineend=memchr(line, '\n', buf+size-line);
line=memchr(line, '>', lineend ? lineend-line : buf+size-line);
if (!line++)
goto out;
date=strtoul(line, NULL, 10);
result= (revs->max_age==-1||revs->max_age<date) &&
(revs->min_age==-1||revs->min_age>date);
out:
free(buf);
returnresult;
}
/* Write the pack data to bundle_fd, then close it if it is > 1. */
staticintwrite_pack_data(intbundle_fd, structrev_info*revs)
{
structchild_processpack_objects=CHILD_PROCESS_INIT;
inti;
argv_array_pushl(&pack_objects.args,
"pack-objects", "--all-progress-implied",
"--stdout", "--thin", "--delta-base-offset",
NULL);
pack_objects.in=-1;
pack_objects.out=bundle_fd;
pack_objects.git_cmd=1;
if (start_command(&pack_objects))
returnerror(_("Could not spawn pack-objects"));
for (i=0; i<revs->pending.nr; i++) {
structobject*object=revs->pending.objects[i].item;
if (object->flags&UNINTERESTING)
write_or_die(pack_objects.in, "^", 1);
write_or_die(pack_objects.in, sha1_to_hex(object->sha1), 40);
write_or_die(pack_objects.in, "\n", 1);
}
close(pack_objects.in);
if (finish_command(&pack_objects))
returnerror(_("pack-objects died"));
return0;
}
staticintcompute_and_write_prerequisites(intbundle_fd,
structrev_info*revs,
intargc, constchar**argv)
{
structchild_processrls=CHILD_PROCESS_INIT;
structstrbufbuf=STRBUF_INIT;
FILE*rls_fout;
inti;
argv_array_pushl(&rls.args,
"rev-list", "--boundary", "--pretty=oneline",
NULL);
for (i=1; i<argc; i++)
argv_array_push(&rls.args, argv[i]);
rls.out=-1;
rls.git_cmd=1;
if (start_command(&rls))
return-1;
rls_fout=xfdopen(rls.out, "r");
while (strbuf_getwholeline(&buf, rls_fout, '\n') !=EOF) {
unsigned charsha1[20];
if (buf.len>0&&buf.buf[0] =='-') {
write_or_die(bundle_fd, buf.buf, buf.len);
if (!get_sha1_hex(buf.buf+1, sha1)) {
structobject*object=parse_object_or_die(sha1, buf.buf);
object->flags |= UNINTERESTING;
add_pending_object(revs, object, buf.buf);
}
} elseif (!get_sha1_hex(buf.buf, sha1)) {
structobject*object=parse_object_or_die(sha1, buf.buf);
object->flags |= SHOWN;
}
}
strbuf_release(&buf);
fclose(rls_fout);
if (finish_command(&rls))
returnerror(_("rev-list died"));
return0;
}
/*
* Write out bundle refs based on the tips already
* parsed into revs.pending. As a side effect, may
* manipulate revs.pending to include additional
* necessary objects (like tags).
*
* Returns the number of refs written, or negative
* on error.
*/
staticintwrite_bundle_refs(intbundle_fd, structrev_info*revs)
{
inti;
intref_count=0;
for (i=0; i<revs->pending.nr; i++) {
structobject_array_entry*e=revs->pending.objects+i;
unsigned charsha1[20];
char*ref;
constchar*display_ref;
intflag;
if (e->item->flags&UNINTERESTING)
continue;
if (dwim_ref(e->name, strlen(e->name), sha1, &ref) !=1)
goto skip_write_ref;
if (read_ref_full(e->name, RESOLVE_REF_READING, sha1, &flag))
flag=0;
display_ref= (flag&REF_ISSYMREF) ? e->name : ref;
if (e->item->type==OBJ_TAG&&
!is_tag_in_date_range(e->item, revs)) {
e->item->flags |= UNINTERESTING;
goto skip_write_ref;
}
/*
* Make sure the refs we wrote out is correct; --max-count and
* other limiting options could have prevented all the tips
* from getting output.
*
* Non commit objects such as tags and blobs do not have
* this issue as they are not affected by those extra
* constraints.
*/
if (!(e->item->flags&SHOWN) &&e->item->type==OBJ_COMMIT) {
warning(_("ref '%s' is excluded by the rev-list options"),
e->name);
goto skip_write_ref;
}
/*
* If you run "git bundle create bndl v1.0..v2.0", the
* name of the positive ref is "v2.0" but that is the
* commit that is referenced by the tag, and not the tag
* itself.
*/
if (hashcmp(sha1, e->item->sha1)) {
/*
* Is this the positive end of a range expressed
* in terms of a tag (e.g. v2.0 from the range
* "v1.0..v2.0")?
*/
structcommit*one=lookup_commit_reference(sha1);
structobject*obj;
if (e->item==&(one->object)) {
/*
* Need to include e->name as an
* independent ref to the pack-objects
* input, so that the tag is included
* in the output; otherwise we would
* end up triggering "empty bundle"
* error.
*/
obj=parse_object_or_die(sha1, e->name);
obj->flags |= SHOWN;
add_pending_object(revs, obj, e->name);
}
goto skip_write_ref;
}
ref_count++;
write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40);
write_or_die(bundle_fd, " ", 1);
write_or_die(bundle_fd, display_ref, strlen(display_ref));
write_or_die(bundle_fd, "\n", 1);
skip_write_ref:
free(ref);
}
/* end header */
write_or_die(bundle_fd, "\n", 1);
returnref_count;
}
intcreate_bundle(structbundle_header*header, constchar*path,
intargc, constchar**argv)
{
staticstructlock_filelock;
intbundle_fd=-1;
intbundle_to_stdout;
intref_count=0;
structrev_inforevs;
bundle_to_stdout= !strcmp(path, "-");
if (bundle_to_stdout)
bundle_fd=1;
else {
bundle_fd=hold_lock_file_for_update(&lock, path,
LOCK_DIE_ON_ERROR);
/*
* write_pack_data() will close the fd passed to it,
* but commit_lock_file() will also try to close the
* lockfile's fd. So make a copy of the file
* descriptor to avoid trying to close it twice.
*/
bundle_fd=dup(bundle_fd);
if (bundle_fd<0)
die_errno("unable to dup file descriptor");
}
/* write signature */
write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
/* init revs to list objects for pack-objects later */
save_commit_buffer=0;
init_revisions(&revs, NULL);
/* write prerequisites */
if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv))
return-1;
argc=setup_revisions(argc, argv, &revs, NULL);
if (argc>1)
returnerror(_("unrecognized argument: %s"), argv[1]);
object_array_remove_duplicates(&revs.pending);
ref_count=write_bundle_refs(bundle_fd, &revs);
if (!ref_count)
die(_("Refusing to create empty bundle."));
elseif (ref_count<0)
return-1;
/* write pack */
if (write_pack_data(bundle_fd, &revs))
return-1;
if (!bundle_to_stdout) {
if (commit_lock_file(&lock))
die_errno(_("cannot create '%s'"), path);
}
return0;
}
intunbundle(structbundle_header*header, intbundle_fd, intflags)
{
constchar*argv_index_pack[] = {"index-pack",
"--fix-thin", "--stdin", NULL, NULL};
structchild_processip=CHILD_PROCESS_INIT;
if (flags&BUNDLE_VERBOSE)
argv_index_pack[3] ="-v";
if (verify_bundle(header, 0))
return-1;
ip.argv=argv_index_pack;
ip.in=bundle_fd;
ip.no_stdout=1;
ip.git_cmd=1;
if (run_command(&ip))
returnerror(_("index-pack died"));
return0;
}