Move 'builtin-*' into a 'builtin/' subdirectory
This shrinks the top-level directory a bit, and makes it much more pleasant to use auto-completion on the thing. Instead of [torvalds@nehalem git]$ em buil<tab> Display all 180 possibilities? (y or n) [torvalds@nehalem git]$ em builtin-sh builtin-shortlog.c builtin-show-branch.c builtin-show-ref.c builtin-shortlog.o builtin-show-branch.o builtin-show-ref.o [torvalds@nehalem git]$ em builtin-shor<tab> builtin-shortlog.c builtin-shortlog.o [torvalds@nehalem git]$ em builtin-shortlog.c you get [torvalds@nehalem git]$ em buil<tab> [type] builtin/ builtin.h [torvalds@nehalem git]$ em builtin [auto-completes to] [torvalds@nehalem git]$ em builtin/sh<tab> [type] shortlog.c shortlog.o show-branch.c show-branch.o show-ref.c show-ref.o [torvalds@nehalem git]$ em builtin/sho [auto-completes to] [torvalds@nehalem git]$ em builtin/shor<tab> [type] shortlog.c shortlog.o [torvalds@nehalem git]$ em builtin/shortlog.c which doesn't seem all that different, but not having that annoying break in "Display all 180 possibilities?" is quite a relief. NOTE! If you do this in a clean tree (no object files etc), or using an editor that has auto-completion rules that ignores '*.o' files, you won't see that annoying 'Display all 180 possibilities?' message - it will just show the choices instead. I think bash has some cut-off around 100 choices or something. So the reason I see this is that I'm using an odd editory, and thus don't have the rules to cut down on auto-completion. But you can simulate that by using 'ls' instead, or something similar. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Linus Torvalds
committed by
Junio C Hamano
Junio C Hamano
parent
241b9254e1
commit
81b50f3ce4
633
builtin/fast-export.c
Normal file
633
builtin/fast-export.c
Normal file
@ -0,0 +1,633 @@
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/*
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* "git fast-export" builtin command
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*
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* Copyright (C) 2007 Johannes E. Schindelin
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*/
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#include "builtin.h"
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#include "cache.h"
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#include "commit.h"
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#include "object.h"
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#include "tag.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "log-tree.h"
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#include "revision.h"
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#include "decorate.h"
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#include "string-list.h"
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#include "utf8.h"
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#include "parse-options.h"
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static const char *fast_export_usage[] = {
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"git fast-export [rev-list-opts]",
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NULL
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};
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static int progress;
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static enum { ABORT, VERBATIM, WARN, STRIP } signed_tag_mode = ABORT;
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static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ABORT;
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static int fake_missing_tagger;
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static int no_data;
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static int parse_opt_signed_tag_mode(const struct option *opt,
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const char *arg, int unset)
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{
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if (unset || !strcmp(arg, "abort"))
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signed_tag_mode = ABORT;
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else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore"))
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signed_tag_mode = VERBATIM;
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else if (!strcmp(arg, "warn"))
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signed_tag_mode = WARN;
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else if (!strcmp(arg, "strip"))
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signed_tag_mode = STRIP;
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else
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return error("Unknown signed-tag mode: %s", arg);
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return 0;
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}
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static int parse_opt_tag_of_filtered_mode(const struct option *opt,
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const char *arg, int unset)
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{
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if (unset || !strcmp(arg, "abort"))
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tag_of_filtered_mode = ABORT;
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else if (!strcmp(arg, "drop"))
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tag_of_filtered_mode = DROP;
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else if (!strcmp(arg, "rewrite"))
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tag_of_filtered_mode = REWRITE;
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else
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return error("Unknown tag-of-filtered mode: %s", arg);
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return 0;
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}
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static struct decoration idnums;
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static uint32_t last_idnum;
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static int has_unshown_parent(struct commit *commit)
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{
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struct commit_list *parent;
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for (parent = commit->parents; parent; parent = parent->next)
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if (!(parent->item->object.flags & SHOWN) &&
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!(parent->item->object.flags & UNINTERESTING))
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return 1;
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return 0;
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}
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/* Since intptr_t is C99, we do not use it here */
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static inline uint32_t *mark_to_ptr(uint32_t mark)
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{
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return ((uint32_t *)NULL) + mark;
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}
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static inline uint32_t ptr_to_mark(void * mark)
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{
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return (uint32_t *)mark - (uint32_t *)NULL;
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}
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static inline void mark_object(struct object *object, uint32_t mark)
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{
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add_decoration(&idnums, object, mark_to_ptr(mark));
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}
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static inline void mark_next_object(struct object *object)
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{
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mark_object(object, ++last_idnum);
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}
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static int get_object_mark(struct object *object)
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{
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void *decoration = lookup_decoration(&idnums, object);
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if (!decoration)
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return 0;
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return ptr_to_mark(decoration);
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}
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static void show_progress(void)
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{
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static int counter = 0;
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if (!progress)
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return;
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if ((++counter % progress) == 0)
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printf("progress %d objects\n", counter);
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}
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static void handle_object(const unsigned char *sha1)
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{
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unsigned long size;
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enum object_type type;
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char *buf;
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struct object *object;
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if (no_data)
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return;
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if (is_null_sha1(sha1))
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return;
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object = parse_object(sha1);
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if (!object)
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die ("Could not read blob %s", sha1_to_hex(sha1));
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if (object->flags & SHOWN)
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return;
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf)
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die ("Could not read blob %s", sha1_to_hex(sha1));
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mark_next_object(object);
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printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
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if (size && fwrite(buf, size, 1, stdout) != 1)
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die_errno ("Could not write blob '%s'", sha1_to_hex(sha1));
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printf("\n");
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show_progress();
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object->flags |= SHOWN;
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free(buf);
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}
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static void show_filemodify(struct diff_queue_struct *q,
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struct diff_options *options, void *data)
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{
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int i;
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for (i = 0; i < q->nr; i++) {
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struct diff_filespec *ospec = q->queue[i]->one;
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struct diff_filespec *spec = q->queue[i]->two;
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switch (q->queue[i]->status) {
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case DIFF_STATUS_DELETED:
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printf("D %s\n", spec->path);
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break;
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case DIFF_STATUS_COPIED:
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case DIFF_STATUS_RENAMED:
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printf("%c \"%s\" \"%s\"\n", q->queue[i]->status,
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ospec->path, spec->path);
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if (!hashcmp(ospec->sha1, spec->sha1) &&
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ospec->mode == spec->mode)
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break;
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/* fallthrough */
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case DIFF_STATUS_TYPE_CHANGED:
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case DIFF_STATUS_MODIFIED:
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case DIFF_STATUS_ADDED:
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/*
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* Links refer to objects in another repositories;
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* output the SHA-1 verbatim.
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*/
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if (no_data || S_ISGITLINK(spec->mode))
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printf("M %06o %s %s\n", spec->mode,
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sha1_to_hex(spec->sha1), spec->path);
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else {
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struct object *object = lookup_object(spec->sha1);
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printf("M %06o :%d %s\n", spec->mode,
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get_object_mark(object), spec->path);
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}
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break;
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default:
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die("Unexpected comparison status '%c' for %s, %s",
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q->queue[i]->status,
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ospec->path ? ospec->path : "none",
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spec->path ? spec->path : "none");
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}
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}
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}
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static const char *find_encoding(const char *begin, const char *end)
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{
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const char *needle = "\nencoding ";
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char *bol, *eol;
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bol = memmem(begin, end ? end - begin : strlen(begin),
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needle, strlen(needle));
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if (!bol)
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return git_commit_encoding;
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bol += strlen(needle);
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eol = strchrnul(bol, '\n');
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*eol = '\0';
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return bol;
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}
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static void handle_commit(struct commit *commit, struct rev_info *rev)
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{
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int saved_output_format = rev->diffopt.output_format;
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const char *author, *author_end, *committer, *committer_end;
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const char *encoding, *message;
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char *reencoded = NULL;
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struct commit_list *p;
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int i;
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rev->diffopt.output_format = DIFF_FORMAT_CALLBACK;
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parse_commit(commit);
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author = strstr(commit->buffer, "\nauthor ");
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if (!author)
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die ("Could not find author in commit %s",
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sha1_to_hex(commit->object.sha1));
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author++;
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author_end = strchrnul(author, '\n');
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committer = strstr(author_end, "\ncommitter ");
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if (!committer)
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die ("Could not find committer in commit %s",
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sha1_to_hex(commit->object.sha1));
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committer++;
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committer_end = strchrnul(committer, '\n');
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message = strstr(committer_end, "\n\n");
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encoding = find_encoding(committer_end, message);
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if (message)
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message += 2;
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if (commit->parents &&
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get_object_mark(&commit->parents->item->object) != 0) {
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parse_commit(commit->parents->item);
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diff_tree_sha1(commit->parents->item->tree->object.sha1,
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commit->tree->object.sha1, "", &rev->diffopt);
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}
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else
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diff_root_tree_sha1(commit->tree->object.sha1,
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"", &rev->diffopt);
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/* Export the referenced blobs, and remember the marks. */
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for (i = 0; i < diff_queued_diff.nr; i++)
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if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode))
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handle_object(diff_queued_diff.queue[i]->two->sha1);
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mark_next_object(&commit->object);
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if (!is_encoding_utf8(encoding))
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reencoded = reencode_string(message, "UTF-8", encoding);
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if (!commit->parents)
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printf("reset %s\n", (const char*)commit->util);
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printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
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(const char *)commit->util, last_idnum,
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(int)(author_end - author), author,
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(int)(committer_end - committer), committer,
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(unsigned)(reencoded
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? strlen(reencoded) : message
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? strlen(message) : 0),
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reencoded ? reencoded : message ? message : "");
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free(reencoded);
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for (i = 0, p = commit->parents; p; p = p->next) {
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int mark = get_object_mark(&p->item->object);
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if (!mark)
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continue;
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if (i == 0)
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printf("from :%d\n", mark);
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else
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printf("merge :%d\n", mark);
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i++;
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}
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log_tree_diff_flush(rev);
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rev->diffopt.output_format = saved_output_format;
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printf("\n");
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show_progress();
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}
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static void handle_tail(struct object_array *commits, struct rev_info *revs)
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{
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struct commit *commit;
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while (commits->nr) {
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commit = (struct commit *)commits->objects[commits->nr - 1].item;
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if (has_unshown_parent(commit))
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return;
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handle_commit(commit, revs);
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commits->nr--;
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}
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}
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static void handle_tag(const char *name, struct tag *tag)
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{
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unsigned long size;
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enum object_type type;
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char *buf;
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const char *tagger, *tagger_end, *message;
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size_t message_size = 0;
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struct object *tagged;
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int tagged_mark;
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struct commit *p;
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/* Trees have no identifer in fast-export output, thus we have no way
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* to output tags of trees, tags of tags of trees, etc. Simply omit
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* such tags.
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*/
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tagged = tag->tagged;
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while (tagged->type == OBJ_TAG) {
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tagged = ((struct tag *)tagged)->tagged;
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}
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if (tagged->type == OBJ_TREE) {
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warning("Omitting tag %s,\nsince tags of trees (or tags of tags of trees, etc.) are not supported.",
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sha1_to_hex(tag->object.sha1));
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return;
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}
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buf = read_sha1_file(tag->object.sha1, &type, &size);
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if (!buf)
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die ("Could not read tag %s", sha1_to_hex(tag->object.sha1));
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message = memmem(buf, size, "\n\n", 2);
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if (message) {
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message += 2;
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message_size = strlen(message);
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}
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tagger = memmem(buf, message ? message - buf : size, "\ntagger ", 8);
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if (!tagger) {
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if (fake_missing_tagger)
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tagger = "tagger Unspecified Tagger "
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"<unspecified-tagger> 0 +0000";
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else
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tagger = "";
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tagger_end = tagger + strlen(tagger);
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} else {
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tagger++;
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tagger_end = strchrnul(tagger, '\n');
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}
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/* handle signed tags */
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if (message) {
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const char *signature = strstr(message,
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"\n-----BEGIN PGP SIGNATURE-----\n");
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if (signature)
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switch(signed_tag_mode) {
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case ABORT:
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die ("Encountered signed tag %s; use "
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"--signed-tag=<mode> to handle it.",
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sha1_to_hex(tag->object.sha1));
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case WARN:
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warning ("Exporting signed tag %s",
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sha1_to_hex(tag->object.sha1));
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/* fallthru */
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case VERBATIM:
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break;
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case STRIP:
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message_size = signature + 1 - message;
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break;
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}
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}
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/* handle tag->tagged having been filtered out due to paths specified */
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tagged = tag->tagged;
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tagged_mark = get_object_mark(tagged);
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if (!tagged_mark) {
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switch(tag_of_filtered_mode) {
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case ABORT:
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die ("Tag %s tags unexported object; use "
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"--tag-of-filtered-object=<mode> to handle it.",
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sha1_to_hex(tag->object.sha1));
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case DROP:
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/* Ignore this tag altogether */
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return;
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case REWRITE:
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if (tagged->type != OBJ_COMMIT) {
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die ("Tag %s tags unexported %s!",
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sha1_to_hex(tag->object.sha1),
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typename(tagged->type));
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}
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p = (struct commit *)tagged;
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for (;;) {
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if (p->parents && p->parents->next)
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break;
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if (p->object.flags & UNINTERESTING)
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break;
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if (!(p->object.flags & TREESAME))
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break;
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if (!p->parents)
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die ("Can't find replacement commit for tag %s\n",
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sha1_to_hex(tag->object.sha1));
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p = p->parents->item;
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}
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tagged_mark = get_object_mark(&p->object);
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}
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}
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if (!prefixcmp(name, "refs/tags/"))
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name += 10;
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printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
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name, tagged_mark,
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(int)(tagger_end - tagger), tagger,
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tagger == tagger_end ? "" : "\n",
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(int)message_size, (int)message_size, message ? message : "");
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}
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static void get_tags_and_duplicates(struct object_array *pending,
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struct string_list *extra_refs)
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{
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struct tag *tag;
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int i;
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||||
|
||||
for (i = 0; i < pending->nr; i++) {
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struct object_array_entry *e = pending->objects + i;
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unsigned char sha1[20];
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struct commit *commit = commit;
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char *full_name;
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|
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if (dwim_ref(e->name, strlen(e->name), sha1, &full_name) != 1)
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continue;
|
||||
|
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switch (e->item->type) {
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case OBJ_COMMIT:
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commit = (struct commit *)e->item;
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||||
break;
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||||
case OBJ_TAG:
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tag = (struct tag *)e->item;
|
||||
|
||||
/* handle nested tags */
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||||
while (tag && tag->object.type == OBJ_TAG) {
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parse_object(tag->object.sha1);
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||||
string_list_append(full_name, extra_refs)->util = tag;
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||||
tag = (struct tag *)tag->tagged;
|
||||
}
|
||||
if (!tag)
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die ("Tag %s points nowhere?", e->name);
|
||||
switch(tag->object.type) {
|
||||
case OBJ_COMMIT:
|
||||
commit = (struct commit *)tag;
|
||||
break;
|
||||
case OBJ_BLOB:
|
||||
handle_object(tag->object.sha1);
|
||||
continue;
|
||||
default: /* OBJ_TAG (nested tags) is already handled */
|
||||
warning("Tag points to object of unexpected type %s, skipping.",
|
||||
typename(tag->object.type));
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
warning("%s: Unexpected object of type %s, skipping.",
|
||||
e->name,
|
||||
typename(e->item->type));
|
||||
continue;
|
||||
}
|
||||
if (commit->util)
|
||||
/* more than one name for the same object */
|
||||
string_list_append(full_name, extra_refs)->util = commit;
|
||||
else
|
||||
commit->util = full_name;
|
||||
}
|
||||
}
|
||||
|
||||
static void handle_tags_and_duplicates(struct string_list *extra_refs)
|
||||
{
|
||||
struct commit *commit;
|
||||
int i;
|
||||
|
||||
for (i = extra_refs->nr - 1; i >= 0; i--) {
|
||||
const char *name = extra_refs->items[i].string;
|
||||
struct object *object = extra_refs->items[i].util;
|
||||
switch (object->type) {
|
||||
case OBJ_TAG:
|
||||
handle_tag(name, (struct tag *)object);
|
||||
break;
|
||||
case OBJ_COMMIT:
|
||||
/* create refs pointing to already seen commits */
|
||||
commit = (struct commit *)object;
|
||||
printf("reset %s\nfrom :%d\n\n", name,
|
||||
get_object_mark(&commit->object));
|
||||
show_progress();
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void export_marks(char *file)
|
||||
{
|
||||
unsigned int i;
|
||||
uint32_t mark;
|
||||
struct object_decoration *deco = idnums.hash;
|
||||
FILE *f;
|
||||
int e = 0;
|
||||
|
||||
f = fopen(file, "w");
|
||||
if (!f)
|
||||
error("Unable to open marks file %s for writing.", file);
|
||||
|
||||
for (i = 0; i < idnums.size; i++) {
|
||||
if (deco->base && deco->base->type == 1) {
|
||||
mark = ptr_to_mark(deco->decoration);
|
||||
if (fprintf(f, ":%"PRIu32" %s\n", mark,
|
||||
sha1_to_hex(deco->base->sha1)) < 0) {
|
||||
e = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
deco++;
|
||||
}
|
||||
|
||||
e |= ferror(f);
|
||||
e |= fclose(f);
|
||||
if (e)
|
||||
error("Unable to write marks file %s.", file);
|
||||
}
|
||||
|
||||
static void import_marks(char *input_file)
|
||||
{
|
||||
char line[512];
|
||||
FILE *f = fopen(input_file, "r");
|
||||
if (!f)
|
||||
die_errno("cannot read '%s'", input_file);
|
||||
|
||||
while (fgets(line, sizeof(line), f)) {
|
||||
uint32_t mark;
|
||||
char *line_end, *mark_end;
|
||||
unsigned char sha1[20];
|
||||
struct object *object;
|
||||
|
||||
line_end = strchr(line, '\n');
|
||||
if (line[0] != ':' || !line_end)
|
||||
die("corrupt mark line: %s", line);
|
||||
*line_end = '\0';
|
||||
|
||||
mark = strtoumax(line + 1, &mark_end, 10);
|
||||
if (!mark || mark_end == line + 1
|
||||
|| *mark_end != ' ' || get_sha1(mark_end + 1, sha1))
|
||||
die("corrupt mark line: %s", line);
|
||||
|
||||
object = parse_object(sha1);
|
||||
if (!object)
|
||||
die ("Could not read blob %s", sha1_to_hex(sha1));
|
||||
|
||||
if (object->flags & SHOWN)
|
||||
error("Object %s already has a mark", sha1);
|
||||
|
||||
mark_object(object, mark);
|
||||
if (last_idnum < mark)
|
||||
last_idnum = mark;
|
||||
|
||||
object->flags |= SHOWN;
|
||||
}
|
||||
fclose(f);
|
||||
}
|
||||
|
||||
int cmd_fast_export(int argc, const char **argv, const char *prefix)
|
||||
{
|
||||
struct rev_info revs;
|
||||
struct object_array commits = { 0, 0, NULL };
|
||||
struct string_list extra_refs = { NULL, 0, 0, 0 };
|
||||
struct commit *commit;
|
||||
char *export_filename = NULL, *import_filename = NULL;
|
||||
struct option options[] = {
|
||||
OPT_INTEGER(0, "progress", &progress,
|
||||
"show progress after <n> objects"),
|
||||
OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, "mode",
|
||||
"select handling of signed tags",
|
||||
parse_opt_signed_tag_mode),
|
||||
OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, "mode",
|
||||
"select handling of tags that tag filtered objects",
|
||||
parse_opt_tag_of_filtered_mode),
|
||||
OPT_STRING(0, "export-marks", &export_filename, "FILE",
|
||||
"Dump marks to this file"),
|
||||
OPT_STRING(0, "import-marks", &import_filename, "FILE",
|
||||
"Import marks from this file"),
|
||||
OPT_BOOLEAN(0, "fake-missing-tagger", &fake_missing_tagger,
|
||||
"Fake a tagger when tags lack one"),
|
||||
{ OPTION_NEGBIT, 0, "data", &no_data, NULL,
|
||||
"Skip output of blob data",
|
||||
PARSE_OPT_NOARG | PARSE_OPT_NEGHELP, NULL, 1 },
|
||||
OPT_END()
|
||||
};
|
||||
|
||||
if (argc == 1)
|
||||
usage_with_options (fast_export_usage, options);
|
||||
|
||||
/* we handle encodings */
|
||||
git_config(git_default_config, NULL);
|
||||
|
||||
init_revisions(&revs, prefix);
|
||||
revs.topo_order = 1;
|
||||
revs.show_source = 1;
|
||||
revs.rewrite_parents = 1;
|
||||
argc = setup_revisions(argc, argv, &revs, NULL);
|
||||
argc = parse_options(argc, argv, prefix, options, fast_export_usage, 0);
|
||||
if (argc > 1)
|
||||
usage_with_options (fast_export_usage, options);
|
||||
|
||||
if (import_filename)
|
||||
import_marks(import_filename);
|
||||
|
||||
get_tags_and_duplicates(&revs.pending, &extra_refs);
|
||||
|
||||
if (prepare_revision_walk(&revs))
|
||||
die("revision walk setup failed");
|
||||
revs.diffopt.format_callback = show_filemodify;
|
||||
DIFF_OPT_SET(&revs.diffopt, RECURSIVE);
|
||||
while ((commit = get_revision(&revs))) {
|
||||
if (has_unshown_parent(commit)) {
|
||||
add_object_array(&commit->object, NULL, &commits);
|
||||
}
|
||||
else {
|
||||
handle_commit(commit, &revs);
|
||||
handle_tail(&commits, &revs);
|
||||
}
|
||||
}
|
||||
|
||||
handle_tags_and_duplicates(&extra_refs);
|
||||
|
||||
if (export_filename)
|
||||
export_marks(export_filename);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user