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5efc60c12f
Two instances of %ld being used for unsigned longs Signed-off-by: Mike Ralphson <mike.ralphson@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
330 lines
8.9 KiB
C
330 lines
8.9 KiB
C
/*
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* Licensed under a two-clause BSD-style license.
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* See LICENSE for details.
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*/
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#include "cache.h"
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#include "quote.h"
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#include "fast_export.h"
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#include "repo_tree.h"
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#include "strbuf.h"
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#include "svndiff.h"
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#include "sliding_window.h"
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#include "line_buffer.h"
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#define MAX_GITSVN_LINE_LEN 4096
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static uint32_t first_commit_done;
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static struct line_buffer postimage = LINE_BUFFER_INIT;
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static struct line_buffer report_buffer = LINE_BUFFER_INIT;
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/* NEEDSWORK: move to fast_export_init() */
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static int init_postimage(void)
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{
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static int postimage_initialized;
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if (postimage_initialized)
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return 0;
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postimage_initialized = 1;
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return buffer_tmpfile_init(&postimage);
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}
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void fast_export_init(int fd)
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{
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first_commit_done = 0;
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if (buffer_fdinit(&report_buffer, fd))
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die_errno("cannot read from file descriptor %d", fd);
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}
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void fast_export_deinit(void)
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{
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if (buffer_deinit(&report_buffer))
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die_errno("error closing fast-import feedback stream");
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}
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void fast_export_delete(const char *path)
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{
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putchar('D');
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putchar(' ');
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quote_c_style(path, NULL, stdout, 0);
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putchar('\n');
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}
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static void fast_export_truncate(const char *path, uint32_t mode)
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{
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fast_export_modify(path, mode, "inline");
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printf("data 0\n\n");
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}
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void fast_export_modify(const char *path, uint32_t mode, const char *dataref)
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{
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/* Mode must be 100644, 100755, 120000, or 160000. */
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if (!dataref) {
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fast_export_truncate(path, mode);
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return;
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}
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printf("M %06"PRIo32" %s ", mode, dataref);
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quote_c_style(path, NULL, stdout, 0);
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putchar('\n');
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}
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void fast_export_begin_note(uint32_t revision, const char *author,
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const char *log, unsigned long timestamp, const char *note_ref)
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{
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static int firstnote = 1;
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size_t loglen = strlen(log);
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printf("commit %s\n", note_ref);
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printf("committer %s <%s@%s> %lu +0000\n", author, author, "local", timestamp);
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printf("data %"PRIuMAX"\n", (uintmax_t)loglen);
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fwrite(log, loglen, 1, stdout);
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if (firstnote) {
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if (revision > 1)
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printf("from %s^0", note_ref);
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firstnote = 0;
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}
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fputc('\n', stdout);
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}
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void fast_export_note(const char *committish, const char *dataref)
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{
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printf("N %s %s\n", dataref, committish);
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}
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static char gitsvnline[MAX_GITSVN_LINE_LEN];
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void fast_export_begin_commit(uint32_t revision, const char *author,
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const struct strbuf *log,
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const char *uuid, const char *url,
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unsigned long timestamp, const char *local_ref)
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{
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static const struct strbuf empty = STRBUF_INIT;
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if (!log)
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log = ∅
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if (*uuid && *url) {
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snprintf(gitsvnline, MAX_GITSVN_LINE_LEN,
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"\n\ngit-svn-id: %s@%"PRIu32" %s\n",
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url, revision, uuid);
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} else {
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*gitsvnline = '\0';
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}
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printf("commit %s\n", local_ref);
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printf("mark :%"PRIu32"\n", revision);
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printf("committer %s <%s@%s> %lu +0000\n",
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*author ? author : "nobody",
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*author ? author : "nobody",
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*uuid ? uuid : "local", timestamp);
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printf("data %"PRIuMAX"\n",
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(uintmax_t) (log->len + strlen(gitsvnline)));
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fwrite(log->buf, log->len, 1, stdout);
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printf("%s\n", gitsvnline);
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if (!first_commit_done) {
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if (revision > 1)
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printf("from :%"PRIu32"\n", revision - 1);
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first_commit_done = 1;
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}
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}
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void fast_export_end_commit(uint32_t revision)
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{
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printf("progress Imported commit %"PRIu32".\n\n", revision);
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}
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static void ls_from_rev(uint32_t rev, const char *path)
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{
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/* ls :5 path/to/old/file */
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printf("ls :%"PRIu32" ", rev);
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quote_c_style(path, NULL, stdout, 0);
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putchar('\n');
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fflush(stdout);
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}
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static void ls_from_active_commit(const char *path)
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{
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/* ls "path/to/file" */
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printf("ls \"");
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quote_c_style(path, NULL, stdout, 1);
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printf("\"\n");
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fflush(stdout);
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}
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static const char *get_response_line(void)
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{
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const char *line = buffer_read_line(&report_buffer);
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if (line)
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return line;
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if (buffer_ferror(&report_buffer))
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die_errno("error reading from fast-import");
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die("unexpected end of fast-import feedback");
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}
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static void die_short_read(struct line_buffer *input)
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{
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if (buffer_ferror(input))
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die_errno("error reading dump file");
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die("invalid dump: unexpected end of file");
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}
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static int parse_cat_response_line(const char *header, off_t *len)
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{
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uintmax_t n;
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const char *type;
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const char *end;
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if (ends_with(header, " missing"))
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return error("cat-blob reports missing blob: %s", header);
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type = strstr(header, " blob ");
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if (!type)
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return error("cat-blob header has wrong object type: %s", header);
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n = strtoumax(type + strlen(" blob "), (char **) &end, 10);
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if (end == type + strlen(" blob "))
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return error("cat-blob header does not contain length: %s", header);
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if (memchr(type + strlen(" blob "), '-', end - type - strlen(" blob ")))
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return error("cat-blob header contains negative length: %s", header);
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if (n == UINTMAX_MAX || n > maximum_signed_value_of_type(off_t))
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return error("blob too large for current definition of off_t");
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*len = n;
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if (*end)
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return error("cat-blob header contains garbage after length: %s", header);
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return 0;
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}
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static void check_preimage_overflow(off_t a, off_t b)
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{
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if (signed_add_overflows(a, b))
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die("blob too large for current definition of off_t");
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}
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static long apply_delta(off_t len, struct line_buffer *input,
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const char *old_data, uint32_t old_mode)
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{
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long ret;
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struct sliding_view preimage = SLIDING_VIEW_INIT(&report_buffer, 0);
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FILE *out;
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if (init_postimage() || !(out = buffer_tmpfile_rewind(&postimage)))
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die("cannot open temporary file for blob retrieval");
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if (old_data) {
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const char *response;
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printf("cat-blob %s\n", old_data);
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fflush(stdout);
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response = get_response_line();
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if (parse_cat_response_line(response, &preimage.max_off))
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die("invalid cat-blob response: %s", response);
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check_preimage_overflow(preimage.max_off, 1);
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}
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if (old_mode == REPO_MODE_LNK) {
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strbuf_addstr(&preimage.buf, "link ");
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check_preimage_overflow(preimage.max_off, strlen("link "));
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preimage.max_off += strlen("link ");
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check_preimage_overflow(preimage.max_off, 1);
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}
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if (svndiff0_apply(input, len, &preimage, out))
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die("cannot apply delta");
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if (old_data) {
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/* Read the remainder of preimage and trailing newline. */
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assert(!signed_add_overflows(preimage.max_off, 1));
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preimage.max_off++; /* room for newline */
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if (move_window(&preimage, preimage.max_off - 1, 1))
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die("cannot seek to end of input");
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if (preimage.buf.buf[0] != '\n')
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die("missing newline after cat-blob response");
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}
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ret = buffer_tmpfile_prepare_to_read(&postimage);
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if (ret < 0)
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die("cannot read temporary file for blob retrieval");
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strbuf_release(&preimage.buf);
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return ret;
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}
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void fast_export_buf_to_data(const struct strbuf *data)
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{
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printf("data %"PRIuMAX"\n", (uintmax_t)data->len);
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fwrite(data->buf, data->len, 1, stdout);
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fputc('\n', stdout);
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}
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void fast_export_data(uint32_t mode, off_t len, struct line_buffer *input)
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{
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assert(len >= 0);
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if (mode == REPO_MODE_LNK) {
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/* svn symlink blobs start with "link " */
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if (len < 5)
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die("invalid dump: symlink too short for \"link\" prefix");
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len -= 5;
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if (buffer_skip_bytes(input, 5) != 5)
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die_short_read(input);
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}
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printf("data %"PRIuMAX"\n", (uintmax_t) len);
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if (buffer_copy_bytes(input, len) != len)
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die_short_read(input);
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fputc('\n', stdout);
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}
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static int parse_ls_response(const char *response, uint32_t *mode,
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struct strbuf *dataref)
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{
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const char *tab;
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const char *response_end;
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assert(response);
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response_end = response + strlen(response);
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if (*response == 'm') { /* Missing. */
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errno = ENOENT;
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return -1;
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}
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/* Mode. */
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if (response_end - response < (signed) strlen("100644") ||
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response[strlen("100644")] != ' ')
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die("invalid ls response: missing mode: %s", response);
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*mode = 0;
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for (; *response != ' '; response++) {
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char ch = *response;
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if (ch < '0' || ch > '7')
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die("invalid ls response: mode is not octal: %s", response);
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*mode *= 8;
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*mode += ch - '0';
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}
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/* ' blob ' or ' tree ' */
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if (response_end - response < (signed) strlen(" blob ") ||
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(response[1] != 'b' && response[1] != 't'))
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die("unexpected ls response: not a tree or blob: %s", response);
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response += strlen(" blob ");
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/* Dataref. */
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tab = memchr(response, '\t', response_end - response);
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if (!tab)
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die("invalid ls response: missing tab: %s", response);
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strbuf_add(dataref, response, tab - response);
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return 0;
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}
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int fast_export_ls_rev(uint32_t rev, const char *path,
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uint32_t *mode, struct strbuf *dataref)
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{
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ls_from_rev(rev, path);
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return parse_ls_response(get_response_line(), mode, dataref);
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}
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int fast_export_ls(const char *path, uint32_t *mode, struct strbuf *dataref)
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{
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ls_from_active_commit(path);
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return parse_ls_response(get_response_line(), mode, dataref);
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}
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void fast_export_blob_delta(uint32_t mode,
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uint32_t old_mode, const char *old_data,
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off_t len, struct line_buffer *input)
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{
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long postimage_len;
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assert(len >= 0);
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postimage_len = apply_delta(len, input, old_data, old_mode);
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if (mode == REPO_MODE_LNK) {
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buffer_skip_bytes(&postimage, strlen("link "));
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postimage_len -= strlen("link ");
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}
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printf("data %ld\n", postimage_len);
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buffer_copy_bytes(&postimage, postimage_len);
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fputc('\n', stdout);
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}
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