mirror of
https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
882 lines
20 KiB
C
882 lines
20 KiB
C
#include "cache.h"
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#include "refs.h"
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#include "tag.h"
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#include "commit.h"
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#include "tree.h"
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#include "blob.h"
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#include "epoch.h"
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#include "diff.h"
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#define SEEN (1u << 0)
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#define INTERESTING (1u << 1)
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#define COUNTED (1u << 2)
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#define SHOWN (1u << 3)
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#define TREECHANGE (1u << 4)
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static const char rev_list_usage[] =
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"git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
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" limiting output:\n"
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" --max-count=nr\n"
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" --max-age=epoch\n"
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" --min-age=epoch\n"
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" --sparse\n"
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" --no-merges\n"
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" --all\n"
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" ordering output:\n"
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" --merge-order [ --show-breaks ]\n"
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" --topo-order\n"
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" formatting output:\n"
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" --parents\n"
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" --objects\n"
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" --unpacked\n"
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" --header | --pretty\n"
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" special purpose:\n"
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" --bisect"
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;
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static int dense = 1;
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static int unpacked = 0;
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static int bisect_list = 0;
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static int tag_objects = 0;
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static int tree_objects = 0;
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static int blob_objects = 0;
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static int verbose_header = 0;
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static int show_parents = 0;
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static int hdr_termination = 0;
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static const char *commit_prefix = "";
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static unsigned long max_age = -1;
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static unsigned long min_age = -1;
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static int max_count = -1;
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static enum cmit_fmt commit_format = CMIT_FMT_RAW;
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static int merge_order = 0;
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static int show_breaks = 0;
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static int stop_traversal = 0;
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static int topo_order = 0;
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static int no_merges = 0;
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static const char **paths = NULL;
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static void show_commit(struct commit *commit)
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{
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commit->object.flags |= SHOWN;
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if (show_breaks) {
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commit_prefix = "| ";
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if (commit->object.flags & DISCONTINUITY) {
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commit_prefix = "^ ";
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} else if (commit->object.flags & BOUNDARY) {
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commit_prefix = "= ";
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}
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}
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printf("%s%s", commit_prefix, sha1_to_hex(commit->object.sha1));
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if (show_parents) {
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struct commit_list *parents = commit->parents;
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while (parents) {
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printf(" %s", sha1_to_hex(parents->item->object.sha1));
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parents = parents->next;
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}
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}
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if (commit_format == CMIT_FMT_ONELINE)
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putchar(' ');
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else
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putchar('\n');
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if (verbose_header) {
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static char pretty_header[16384];
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pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
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printf("%s%c", pretty_header, hdr_termination);
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}
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fflush(stdout);
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}
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static int rewrite_one(struct commit **pp)
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{
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for (;;) {
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struct commit *p = *pp;
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if (p->object.flags & (TREECHANGE | UNINTERESTING))
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return 0;
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if (!p->parents)
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return -1;
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*pp = p->parents->item;
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}
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}
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static void rewrite_parents(struct commit *commit)
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{
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struct commit_list **pp = &commit->parents;
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while (*pp) {
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struct commit_list *parent = *pp;
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if (rewrite_one(&parent->item) < 0) {
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*pp = parent->next;
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continue;
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}
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pp = &parent->next;
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}
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}
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static int filter_commit(struct commit * commit)
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{
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if (stop_traversal && (commit->object.flags & BOUNDARY))
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return STOP;
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if (commit->object.flags & (UNINTERESTING|SHOWN))
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return CONTINUE;
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if (min_age != -1 && (commit->date > min_age))
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return CONTINUE;
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if (max_age != -1 && (commit->date < max_age)) {
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stop_traversal=1;
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return CONTINUE;
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}
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if (max_count != -1 && !max_count--)
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return STOP;
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if (no_merges && (commit->parents && commit->parents->next))
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return CONTINUE;
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if (paths && dense) {
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if (!(commit->object.flags & TREECHANGE))
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return CONTINUE;
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rewrite_parents(commit);
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}
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return DO;
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}
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static int process_commit(struct commit * commit)
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{
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int action=filter_commit(commit);
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if (action == STOP) {
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return STOP;
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}
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if (action == CONTINUE) {
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return CONTINUE;
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}
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show_commit(commit);
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return CONTINUE;
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}
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static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name)
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{
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struct object_list *entry = xmalloc(sizeof(*entry));
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entry->item = obj;
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entry->next = *p;
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entry->name = name;
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*p = entry;
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return &entry->next;
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}
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static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name)
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{
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struct object *obj = &blob->object;
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if (!blob_objects)
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return p;
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if (obj->flags & (UNINTERESTING | SEEN))
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return p;
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obj->flags |= SEEN;
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return add_object(obj, p, name);
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}
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static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name)
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{
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struct object *obj = &tree->object;
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struct tree_entry_list *entry;
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if (!tree_objects)
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return p;
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if (obj->flags & (UNINTERESTING | SEEN))
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return p;
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if (parse_tree(tree) < 0)
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die("bad tree object %s", sha1_to_hex(obj->sha1));
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obj->flags |= SEEN;
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p = add_object(obj, p, name);
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entry = tree->entries;
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tree->entries = NULL;
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while (entry) {
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struct tree_entry_list *next = entry->next;
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if (entry->directory)
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p = process_tree(entry->item.tree, p, entry->name);
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else
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p = process_blob(entry->item.blob, p, entry->name);
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free(entry);
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entry = next;
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}
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return p;
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}
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static struct object_list *pending_objects = NULL;
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static void show_commit_list(struct commit_list *list)
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{
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struct object_list *objects = NULL, **p = &objects, *pending;
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while (list) {
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struct commit *commit = pop_most_recent_commit(&list, SEEN);
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p = process_tree(commit->tree, p, "");
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if (process_commit(commit) == STOP)
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break;
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}
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for (pending = pending_objects; pending; pending = pending->next) {
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struct object *obj = pending->item;
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const char *name = pending->name;
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if (obj->flags & (UNINTERESTING | SEEN))
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continue;
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if (obj->type == tag_type) {
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obj->flags |= SEEN;
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p = add_object(obj, p, name);
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continue;
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}
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if (obj->type == tree_type) {
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p = process_tree((struct tree *)obj, p, name);
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continue;
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}
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if (obj->type == blob_type) {
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p = process_blob((struct blob *)obj, p, name);
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continue;
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}
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die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
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}
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while (objects) {
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/* An object with name "foo\n0000000000000000000000000000000000000000"
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* can be used confuse downstream git-pack-objects very badly.
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*/
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const char *ep = strchr(objects->name, '\n');
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if (ep) {
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printf("%s %.*s\n", sha1_to_hex(objects->item->sha1),
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(int) (ep - objects->name),
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objects->name);
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}
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else
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printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
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objects = objects->next;
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}
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}
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static void mark_blob_uninteresting(struct blob *blob)
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{
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if (!blob_objects)
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return;
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if (blob->object.flags & UNINTERESTING)
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return;
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blob->object.flags |= UNINTERESTING;
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}
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static void mark_tree_uninteresting(struct tree *tree)
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{
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struct object *obj = &tree->object;
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struct tree_entry_list *entry;
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if (!tree_objects)
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return;
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if (obj->flags & UNINTERESTING)
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return;
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obj->flags |= UNINTERESTING;
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if (!has_sha1_file(obj->sha1))
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return;
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if (parse_tree(tree) < 0)
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die("bad tree %s", sha1_to_hex(obj->sha1));
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entry = tree->entries;
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tree->entries = NULL;
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while (entry) {
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struct tree_entry_list *next = entry->next;
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if (entry->directory)
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mark_tree_uninteresting(entry->item.tree);
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else
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mark_blob_uninteresting(entry->item.blob);
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free(entry);
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entry = next;
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}
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}
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static void mark_parents_uninteresting(struct commit *commit)
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{
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struct commit_list *parents = commit->parents;
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while (parents) {
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struct commit *commit = parents->item;
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commit->object.flags |= UNINTERESTING;
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/*
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* Normally we haven't parsed the parent
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* yet, so we won't have a parent of a parent
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* here. However, it may turn out that we've
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* reached this commit some other way (where it
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* wasn't uninteresting), in which case we need
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* to mark its parents recursively too..
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*/
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if (commit->parents)
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mark_parents_uninteresting(commit);
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/*
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* A missing commit is ok iff its parent is marked
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* uninteresting.
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*
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* We just mark such a thing parsed, so that when
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* it is popped next time around, we won't be trying
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* to parse it and get an error.
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*/
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if (!has_sha1_file(commit->object.sha1))
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commit->object.parsed = 1;
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parents = parents->next;
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}
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}
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static int everybody_uninteresting(struct commit_list *orig)
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{
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struct commit_list *list = orig;
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while (list) {
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struct commit *commit = list->item;
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list = list->next;
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if (commit->object.flags & UNINTERESTING)
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continue;
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return 0;
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}
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return 1;
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}
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/*
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* This is a truly stupid algorithm, but it's only
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* used for bisection, and we just don't care enough.
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*
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* We care just barely enough to avoid recursing for
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* non-merge entries.
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*/
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static int count_distance(struct commit_list *entry)
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{
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int nr = 0;
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while (entry) {
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struct commit *commit = entry->item;
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struct commit_list *p;
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if (commit->object.flags & (UNINTERESTING | COUNTED))
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break;
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nr++;
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commit->object.flags |= COUNTED;
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p = commit->parents;
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entry = p;
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if (p) {
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p = p->next;
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while (p) {
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nr += count_distance(p);
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p = p->next;
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}
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}
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}
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return nr;
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}
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static void clear_distance(struct commit_list *list)
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{
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while (list) {
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struct commit *commit = list->item;
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commit->object.flags &= ~COUNTED;
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list = list->next;
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}
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}
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static struct commit_list *find_bisection(struct commit_list *list)
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{
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int nr, closest;
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struct commit_list *p, *best;
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nr = 0;
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p = list;
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while (p) {
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nr++;
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p = p->next;
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}
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closest = 0;
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best = list;
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p = list;
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while (p) {
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int distance = count_distance(p);
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clear_distance(list);
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if (nr - distance < distance)
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distance = nr - distance;
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if (distance > closest) {
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best = p;
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closest = distance;
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}
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p = p->next;
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}
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if (best)
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best->next = NULL;
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return best;
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}
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static void mark_edges_uninteresting(struct commit_list *list)
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{
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for ( ; list; list = list->next) {
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struct commit_list *parents = list->item->parents;
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for ( ; parents; parents = parents->next) {
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struct commit *commit = parents->item;
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if (commit->object.flags & UNINTERESTING)
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mark_tree_uninteresting(commit->tree);
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}
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}
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}
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static int is_different = 0;
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static void file_add_remove(struct diff_options *options,
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int addremove, unsigned mode,
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const unsigned char *sha1,
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const char *base, const char *path)
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{
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is_different = 1;
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}
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static void file_change(struct diff_options *options,
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unsigned old_mode, unsigned new_mode,
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const unsigned char *old_sha1,
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const unsigned char *new_sha1,
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const char *base, const char *path)
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{
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is_different = 1;
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}
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static struct diff_options diff_opt = {
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.recursive = 1,
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.add_remove = file_add_remove,
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.change = file_change,
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};
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static int same_tree(struct tree *t1, struct tree *t2)
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{
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is_different = 0;
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if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0)
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return 0;
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return !is_different;
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}
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static int same_tree_as_empty(struct tree *t1)
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{
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int retval;
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void *tree;
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struct tree_desc empty, real;
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if (!t1)
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return 0;
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tree = read_object_with_reference(t1->object.sha1, "tree", &real.size, NULL);
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if (!tree)
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return 0;
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real.buf = tree;
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empty.buf = "";
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empty.size = 0;
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is_different = 0;
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retval = diff_tree(&empty, &real, "", &diff_opt);
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free(tree);
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return retval >= 0 && !is_different;
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}
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static struct commit *try_to_simplify_merge(struct commit *commit, struct commit_list *parent)
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{
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if (!commit->tree)
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return NULL;
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while (parent) {
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struct commit *p = parent->item;
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parent = parent->next;
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parse_commit(p);
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if (!p->tree)
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continue;
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if (same_tree(commit->tree, p->tree))
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return p;
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}
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return NULL;
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}
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static void add_parents_to_list(struct commit *commit, struct commit_list **list)
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{
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struct commit_list *parent = commit->parents;
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/*
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* If the commit is uninteresting, don't try to
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* prune parents - we want the maximal uninteresting
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* set.
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*
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* Normally we haven't parsed the parent
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* yet, so we won't have a parent of a parent
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* here. However, it may turn out that we've
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* reached this commit some other way (where it
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* wasn't uninteresting), in which case we need
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* to mark its parents recursively too..
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*/
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if (commit->object.flags & UNINTERESTING) {
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while (parent) {
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struct commit *p = parent->item;
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parent = parent->next;
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parse_commit(p);
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p->object.flags |= UNINTERESTING;
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if (p->parents)
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mark_parents_uninteresting(p);
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if (p->object.flags & SEEN)
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continue;
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p->object.flags |= SEEN;
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insert_by_date(p, list);
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}
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return;
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}
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/*
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* Ok, the commit wasn't uninteresting. If it
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* is a merge, try to find the parent that has
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* no differences in the path set if one exists.
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*/
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if (paths && parent && parent->next) {
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struct commit *preferred;
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preferred = try_to_simplify_merge(commit, parent);
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if (preferred) {
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parent->item = preferred;
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parent->next = NULL;
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}
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}
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while (parent) {
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struct commit *p = parent->item;
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parent = parent->next;
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parse_commit(p);
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if (p->object.flags & SEEN)
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continue;
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p->object.flags |= SEEN;
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insert_by_date(p, list);
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}
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}
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static void compress_list(struct commit_list *list)
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{
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while (list) {
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struct commit *commit = list->item;
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struct commit_list *parent = commit->parents;
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list = list->next;
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if (!parent) {
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if (!same_tree_as_empty(commit->tree))
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commit->object.flags |= TREECHANGE;
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continue;
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}
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/*
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* Exactly one parent? Check if it leaves the tree
|
|
* unchanged
|
|
*/
|
|
if (!parent->next) {
|
|
struct tree *t1 = commit->tree;
|
|
struct tree *t2 = parent->item->tree;
|
|
if (!t1 || !t2 || same_tree(t1, t2))
|
|
continue;
|
|
}
|
|
commit->object.flags |= TREECHANGE;
|
|
}
|
|
}
|
|
|
|
static struct commit_list *limit_list(struct commit_list *list)
|
|
{
|
|
struct commit_list *newlist = NULL;
|
|
struct commit_list **p = &newlist;
|
|
while (list) {
|
|
struct commit_list *entry = list;
|
|
struct commit *commit = list->item;
|
|
struct object *obj = &commit->object;
|
|
|
|
list = list->next;
|
|
free(entry);
|
|
|
|
if (max_age != -1 && (commit->date < max_age))
|
|
obj->flags |= UNINTERESTING;
|
|
if (unpacked && has_sha1_pack(obj->sha1))
|
|
obj->flags |= UNINTERESTING;
|
|
add_parents_to_list(commit, &list);
|
|
if (obj->flags & UNINTERESTING) {
|
|
mark_parents_uninteresting(commit);
|
|
if (everybody_uninteresting(list))
|
|
break;
|
|
continue;
|
|
}
|
|
if (min_age != -1 && (commit->date > min_age))
|
|
continue;
|
|
p = &commit_list_insert(commit, p)->next;
|
|
}
|
|
if (tree_objects)
|
|
mark_edges_uninteresting(newlist);
|
|
if (paths && dense)
|
|
compress_list(newlist);
|
|
if (bisect_list)
|
|
newlist = find_bisection(newlist);
|
|
return newlist;
|
|
}
|
|
|
|
static void add_pending_object(struct object *obj, const char *name)
|
|
{
|
|
add_object(obj, &pending_objects, name);
|
|
}
|
|
|
|
static struct commit *get_commit_reference(const char *name, const unsigned char *sha1, unsigned int flags)
|
|
{
|
|
struct object *object;
|
|
|
|
object = parse_object(sha1);
|
|
if (!object)
|
|
die("bad object %s", name);
|
|
|
|
/*
|
|
* Tag object? Look what it points to..
|
|
*/
|
|
while (object->type == tag_type) {
|
|
struct tag *tag = (struct tag *) object;
|
|
object->flags |= flags;
|
|
if (tag_objects && !(object->flags & UNINTERESTING))
|
|
add_pending_object(object, tag->tag);
|
|
object = parse_object(tag->tagged->sha1);
|
|
if (!object)
|
|
die("bad object %s", sha1_to_hex(tag->tagged->sha1));
|
|
}
|
|
|
|
/*
|
|
* Commit object? Just return it, we'll do all the complex
|
|
* reachability crud.
|
|
*/
|
|
if (object->type == commit_type) {
|
|
struct commit *commit = (struct commit *)object;
|
|
object->flags |= flags;
|
|
if (parse_commit(commit) < 0)
|
|
die("unable to parse commit %s", name);
|
|
if (flags & UNINTERESTING)
|
|
mark_parents_uninteresting(commit);
|
|
return commit;
|
|
}
|
|
|
|
/*
|
|
* Tree object? Either mark it uniniteresting, or add it
|
|
* to the list of objects to look at later..
|
|
*/
|
|
if (object->type == tree_type) {
|
|
struct tree *tree = (struct tree *)object;
|
|
if (!tree_objects)
|
|
return NULL;
|
|
if (flags & UNINTERESTING) {
|
|
mark_tree_uninteresting(tree);
|
|
return NULL;
|
|
}
|
|
add_pending_object(object, "");
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Blob object? You know the drill by now..
|
|
*/
|
|
if (object->type == blob_type) {
|
|
struct blob *blob = (struct blob *)object;
|
|
if (!blob_objects)
|
|
return NULL;
|
|
if (flags & UNINTERESTING) {
|
|
mark_blob_uninteresting(blob);
|
|
return NULL;
|
|
}
|
|
add_pending_object(object, "");
|
|
return NULL;
|
|
}
|
|
die("%s is unknown object", name);
|
|
}
|
|
|
|
static void handle_one_commit(struct commit *com, struct commit_list **lst)
|
|
{
|
|
if (!com || com->object.flags & SEEN)
|
|
return;
|
|
com->object.flags |= SEEN;
|
|
commit_list_insert(com, lst);
|
|
}
|
|
|
|
/* for_each_ref() callback does not allow user data -- Yuck. */
|
|
static struct commit_list **global_lst;
|
|
|
|
static int include_one_commit(const char *path, const unsigned char *sha1)
|
|
{
|
|
struct commit *com = get_commit_reference(path, sha1, 0);
|
|
handle_one_commit(com, global_lst);
|
|
return 0;
|
|
}
|
|
|
|
static void handle_all(struct commit_list **lst)
|
|
{
|
|
global_lst = lst;
|
|
for_each_ref(include_one_commit);
|
|
global_lst = NULL;
|
|
}
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
const char *prefix = setup_git_directory();
|
|
struct commit_list *list = NULL;
|
|
int i, limited = 0;
|
|
|
|
for (i = 1 ; i < argc; i++) {
|
|
int flags;
|
|
const char *arg = argv[i];
|
|
char *dotdot;
|
|
struct commit *commit;
|
|
unsigned char sha1[20];
|
|
|
|
if (!strncmp(arg, "--max-count=", 12)) {
|
|
max_count = atoi(arg + 12);
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--max-age=", 10)) {
|
|
max_age = atoi(arg + 10);
|
|
limited = 1;
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--min-age=", 10)) {
|
|
min_age = atoi(arg + 10);
|
|
limited = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--header")) {
|
|
verbose_header = 1;
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--pretty", 8)) {
|
|
commit_format = get_commit_format(arg+8);
|
|
verbose_header = 1;
|
|
hdr_termination = '\n';
|
|
if (commit_format == CMIT_FMT_ONELINE)
|
|
commit_prefix = "";
|
|
else
|
|
commit_prefix = "commit ";
|
|
continue;
|
|
}
|
|
if (!strncmp(arg, "--no-merges", 11)) {
|
|
no_merges = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--parents")) {
|
|
show_parents = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--bisect")) {
|
|
bisect_list = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--all")) {
|
|
handle_all(&list);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--objects")) {
|
|
tag_objects = 1;
|
|
tree_objects = 1;
|
|
blob_objects = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--unpacked")) {
|
|
unpacked = 1;
|
|
limited = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--merge-order")) {
|
|
merge_order = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--show-breaks")) {
|
|
show_breaks = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--topo-order")) {
|
|
topo_order = 1;
|
|
limited = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--dense")) {
|
|
dense = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--sparse")) {
|
|
dense = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--")) {
|
|
i++;
|
|
break;
|
|
}
|
|
|
|
if (show_breaks && !merge_order)
|
|
usage(rev_list_usage);
|
|
|
|
flags = 0;
|
|
dotdot = strstr(arg, "..");
|
|
if (dotdot) {
|
|
unsigned char from_sha1[20];
|
|
char *next = dotdot + 2;
|
|
*dotdot = 0;
|
|
if (!*next)
|
|
next = "HEAD";
|
|
if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) {
|
|
struct commit *exclude;
|
|
struct commit *include;
|
|
|
|
exclude = get_commit_reference(arg, from_sha1, UNINTERESTING);
|
|
include = get_commit_reference(next, sha1, 0);
|
|
if (!exclude || !include)
|
|
die("Invalid revision range %s..%s", arg, next);
|
|
limited = 1;
|
|
handle_one_commit(exclude, &list);
|
|
handle_one_commit(include, &list);
|
|
continue;
|
|
}
|
|
*dotdot = '.';
|
|
}
|
|
if (*arg == '^') {
|
|
flags = UNINTERESTING;
|
|
arg++;
|
|
limited = 1;
|
|
}
|
|
if (get_sha1(arg, sha1) < 0)
|
|
break;
|
|
commit = get_commit_reference(arg, sha1, flags);
|
|
handle_one_commit(commit, &list);
|
|
}
|
|
|
|
if (!list)
|
|
usage(rev_list_usage);
|
|
|
|
paths = get_pathspec(prefix, argv + i);
|
|
if (paths) {
|
|
limited = 1;
|
|
diff_tree_setup_paths(paths);
|
|
}
|
|
|
|
save_commit_buffer = verbose_header;
|
|
track_object_refs = 0;
|
|
|
|
if (!merge_order) {
|
|
sort_by_date(&list);
|
|
if (list && !limited && max_count == 1 &&
|
|
!tag_objects && !tree_objects && !blob_objects) {
|
|
show_commit(list->item);
|
|
return 0;
|
|
}
|
|
if (limited)
|
|
list = limit_list(list);
|
|
if (topo_order)
|
|
sort_in_topological_order(&list);
|
|
show_commit_list(list);
|
|
} else {
|
|
#ifndef NO_OPENSSL
|
|
if (sort_list_in_merge_order(list, &process_commit)) {
|
|
die("merge order sort failed\n");
|
|
}
|
|
#else
|
|
die("merge order sort unsupported, OpenSSL not linked");
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|