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![Linus Torvalds](/assets/img/avatar_default.png)
This adds more proper rename detection limits. Instead of just checking the limit against the number of potential rename destinations, we verify that the rename matrix (which is what really matters) doesn't grow ridiculously large, and we also make sure that we don't overflow when doing the matrix size calculation. This also changes the default limits from unlimited, to a rename matrix that is limited to 100 entries on a side. You can raise it with the config entry, or by using the "-l<n>" command line flag, but at least the default is now a sane number that avoids spending lots of time (and memory) in situations that likely don't merit it. The choice of default value is of course very debatable. Limiting the rename matrix to a 100x100 size will mean that even if you have just one obvious rename, but you also create (or delete) 10,000 files, the rename matrix will be so big that we disable the heuristics. Sounds reasonable to me, but let's see if people hit this (and, perhaps more importantly, actually *care*) in real life. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
371 lines
9.3 KiB
C
371 lines
9.3 KiB
C
#include "cache.h"
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#include "wt-status.h"
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#include "color.h"
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#include "object.h"
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#include "dir.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "diffcore.h"
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int wt_status_use_color = 0;
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static char wt_status_colors[][COLOR_MAXLEN] = {
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"", /* WT_STATUS_HEADER: normal */
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"\033[32m", /* WT_STATUS_UPDATED: green */
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"\033[31m", /* WT_STATUS_CHANGED: red */
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"\033[31m", /* WT_STATUS_UNTRACKED: red */
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};
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static const char use_add_msg[] =
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"use \"git add <file>...\" to update what will be committed";
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static const char use_add_rm_msg[] =
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"use \"git add/rm <file>...\" to update what will be committed";
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static const char use_add_to_include_msg[] =
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"use \"git add <file>...\" to include in what will be committed";
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static const char *excludes_file;
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static int parse_status_slot(const char *var, int offset)
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{
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if (!strcasecmp(var+offset, "header"))
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return WT_STATUS_HEADER;
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if (!strcasecmp(var+offset, "updated")
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|| !strcasecmp(var+offset, "added"))
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return WT_STATUS_UPDATED;
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if (!strcasecmp(var+offset, "changed"))
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return WT_STATUS_CHANGED;
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if (!strcasecmp(var+offset, "untracked"))
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return WT_STATUS_UNTRACKED;
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die("bad config variable '%s'", var);
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}
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static const char* color(int slot)
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{
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return wt_status_use_color ? wt_status_colors[slot] : "";
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}
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void wt_status_prepare(struct wt_status *s)
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{
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unsigned char sha1[20];
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const char *head;
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memset(s, 0, sizeof(*s));
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head = resolve_ref("HEAD", sha1, 0, NULL);
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s->branch = head ? xstrdup(head) : NULL;
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s->reference = "HEAD";
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}
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static void wt_status_print_cached_header(const char *reference)
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{
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const char *c = color(WT_STATUS_HEADER);
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color_printf_ln(c, "# Changes to be committed:");
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if (reference) {
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color_printf_ln(c, "# (use \"git reset %s <file>...\" to unstage)", reference);
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} else {
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color_printf_ln(c, "# (use \"git rm --cached <file>...\" to unstage)");
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}
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color_printf_ln(c, "#");
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}
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static void wt_status_print_header(const char *main, const char *sub)
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{
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const char *c = color(WT_STATUS_HEADER);
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color_printf_ln(c, "# %s:", main);
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color_printf_ln(c, "# (%s)", sub);
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color_printf_ln(c, "#");
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}
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static void wt_status_print_trailer(void)
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{
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color_printf_ln(color(WT_STATUS_HEADER), "#");
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}
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static const char *quote_crlf(const char *in, char *buf, size_t sz)
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{
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const char *scan;
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char *out;
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const char *ret = in;
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for (scan = in, out = buf; *scan; scan++) {
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int ch = *scan;
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int quoted;
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switch (ch) {
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case '\n':
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quoted = 'n';
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break;
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case '\r':
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quoted = 'r';
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break;
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default:
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*out++ = ch;
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continue;
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}
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*out++ = '\\';
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*out++ = quoted;
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ret = buf;
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}
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*out = '\0';
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return ret;
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}
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static void wt_status_print_filepair(int t, struct diff_filepair *p)
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{
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const char *c = color(t);
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const char *one, *two;
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char onebuf[PATH_MAX], twobuf[PATH_MAX];
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one = quote_crlf(p->one->path, onebuf, sizeof(onebuf));
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two = quote_crlf(p->two->path, twobuf, sizeof(twobuf));
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color_printf(color(WT_STATUS_HEADER), "#\t");
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switch (p->status) {
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case DIFF_STATUS_ADDED:
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color_printf(c, "new file: %s", one);
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break;
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case DIFF_STATUS_COPIED:
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color_printf(c, "copied: %s -> %s", one, two);
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break;
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case DIFF_STATUS_DELETED:
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color_printf(c, "deleted: %s", one);
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break;
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case DIFF_STATUS_MODIFIED:
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color_printf(c, "modified: %s", one);
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break;
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case DIFF_STATUS_RENAMED:
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color_printf(c, "renamed: %s -> %s", one, two);
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break;
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case DIFF_STATUS_TYPE_CHANGED:
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color_printf(c, "typechange: %s", one);
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break;
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case DIFF_STATUS_UNKNOWN:
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color_printf(c, "unknown: %s", one);
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break;
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case DIFF_STATUS_UNMERGED:
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color_printf(c, "unmerged: %s", one);
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break;
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default:
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die("bug: unhandled diff status %c", p->status);
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}
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printf("\n");
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}
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static void wt_status_print_updated_cb(struct diff_queue_struct *q,
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struct diff_options *options,
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void *data)
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{
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struct wt_status *s = data;
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int shown_header = 0;
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int i;
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for (i = 0; i < q->nr; i++) {
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if (q->queue[i]->status == 'U')
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continue;
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if (!shown_header) {
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wt_status_print_cached_header(s->reference);
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s->commitable = 1;
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shown_header = 1;
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}
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wt_status_print_filepair(WT_STATUS_UPDATED, q->queue[i]);
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}
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if (shown_header)
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wt_status_print_trailer();
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}
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static void wt_status_print_changed_cb(struct diff_queue_struct *q,
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struct diff_options *options,
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void *data)
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{
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struct wt_status *s = data;
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int i;
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if (q->nr) {
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const char *msg = use_add_msg;
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s->workdir_dirty = 1;
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for (i = 0; i < q->nr; i++)
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if (q->queue[i]->status == DIFF_STATUS_DELETED) {
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msg = use_add_rm_msg;
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break;
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}
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wt_status_print_header("Changed but not updated", msg);
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}
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for (i = 0; i < q->nr; i++)
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wt_status_print_filepair(WT_STATUS_CHANGED, q->queue[i]);
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if (q->nr)
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wt_status_print_trailer();
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}
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static void wt_read_cache(struct wt_status *s)
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{
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discard_cache();
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read_cache();
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}
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static void wt_status_print_initial(struct wt_status *s)
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{
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int i;
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char buf[PATH_MAX];
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wt_read_cache(s);
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if (active_nr) {
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s->commitable = 1;
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wt_status_print_cached_header(NULL);
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}
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for (i = 0; i < active_nr; i++) {
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color_printf(color(WT_STATUS_HEADER), "#\t");
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color_printf_ln(color(WT_STATUS_UPDATED), "new file: %s",
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quote_crlf(active_cache[i]->name,
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buf, sizeof(buf)));
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}
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if (active_nr)
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wt_status_print_trailer();
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}
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static void wt_status_print_updated(struct wt_status *s)
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{
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struct rev_info rev;
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init_revisions(&rev, NULL);
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setup_revisions(0, NULL, &rev, s->reference);
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rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
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rev.diffopt.format_callback = wt_status_print_updated_cb;
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rev.diffopt.format_callback_data = s;
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rev.diffopt.detect_rename = 1;
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rev.diffopt.rename_limit = 100;
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wt_read_cache(s);
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run_diff_index(&rev, 1);
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}
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static void wt_status_print_changed(struct wt_status *s)
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{
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struct rev_info rev;
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init_revisions(&rev, "");
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setup_revisions(0, NULL, &rev, NULL);
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rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
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rev.diffopt.format_callback = wt_status_print_changed_cb;
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rev.diffopt.format_callback_data = s;
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wt_read_cache(s);
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run_diff_files(&rev, 0);
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}
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static void wt_status_print_untracked(struct wt_status *s)
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{
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struct dir_struct dir;
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const char *x;
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int i;
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int shown_header = 0;
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memset(&dir, 0, sizeof(dir));
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dir.exclude_per_dir = ".gitignore";
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if (!s->untracked) {
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dir.show_other_directories = 1;
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dir.hide_empty_directories = 1;
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}
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x = git_path("info/exclude");
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if (file_exists(x))
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add_excludes_from_file(&dir, x);
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if (excludes_file && file_exists(excludes_file))
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add_excludes_from_file(&dir, excludes_file);
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read_directory(&dir, ".", "", 0, NULL);
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for(i = 0; i < dir.nr; i++) {
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/* check for matching entry, which is unmerged; lifted from
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* builtin-ls-files:show_other_files */
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struct dir_entry *ent = dir.entries[i];
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int pos = cache_name_pos(ent->name, ent->len);
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struct cache_entry *ce;
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if (0 <= pos)
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die("bug in wt_status_print_untracked");
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pos = -pos - 1;
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if (pos < active_nr) {
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ce = active_cache[pos];
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if (ce_namelen(ce) == ent->len &&
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!memcmp(ce->name, ent->name, ent->len))
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continue;
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}
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if (!shown_header) {
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s->workdir_untracked = 1;
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wt_status_print_header("Untracked files",
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use_add_to_include_msg);
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shown_header = 1;
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}
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color_printf(color(WT_STATUS_HEADER), "#\t");
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color_printf_ln(color(WT_STATUS_UNTRACKED), "%.*s",
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ent->len, ent->name);
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}
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}
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static void wt_status_print_verbose(struct wt_status *s)
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{
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struct rev_info rev;
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init_revisions(&rev, NULL);
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setup_revisions(0, NULL, &rev, s->reference);
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rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
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rev.diffopt.detect_rename = 1;
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wt_read_cache(s);
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run_diff_index(&rev, 1);
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}
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void wt_status_print(struct wt_status *s)
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{
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unsigned char sha1[20];
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s->is_initial = get_sha1(s->reference, sha1) ? 1 : 0;
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if (s->branch) {
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const char *on_what = "On branch ";
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const char *branch_name = s->branch;
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if (!prefixcmp(branch_name, "refs/heads/"))
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branch_name += 11;
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else if (!strcmp(branch_name, "HEAD")) {
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branch_name = "";
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on_what = "Not currently on any branch.";
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}
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color_printf_ln(color(WT_STATUS_HEADER),
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"# %s%s", on_what, branch_name);
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}
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if (s->is_initial) {
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color_printf_ln(color(WT_STATUS_HEADER), "#");
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color_printf_ln(color(WT_STATUS_HEADER), "# Initial commit");
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color_printf_ln(color(WT_STATUS_HEADER), "#");
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wt_status_print_initial(s);
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}
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else {
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wt_status_print_updated(s);
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}
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wt_status_print_changed(s);
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wt_status_print_untracked(s);
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if (s->verbose && !s->is_initial)
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wt_status_print_verbose(s);
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if (!s->commitable) {
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if (s->amend)
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printf("# No changes\n");
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else if (s->workdir_dirty)
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printf("no changes added to commit (use \"git add\" and/or \"git commit -a\")\n");
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else if (s->workdir_untracked)
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printf("nothing added to commit but untracked files present (use \"git add\" to track)\n");
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else if (s->is_initial)
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printf("nothing to commit (create/copy files and use \"git add\" to track)\n");
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else
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printf("nothing to commit (working directory clean)\n");
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}
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}
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int git_status_config(const char *k, const char *v)
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{
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if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
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wt_status_use_color = git_config_colorbool(k, v);
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return 0;
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}
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if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
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int slot = parse_status_slot(k, 13);
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color_parse(v, k, wt_status_colors[slot]);
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}
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if (!strcmp(k, "core.excludesfile")) {
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if (!v)
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die("core.excludesfile without value");
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excludes_file = xstrdup(v);
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return 0;
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}
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return git_default_config(k, v);
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}
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