reflog-walk.con commit git-push: allow globbing wildcard refspec. (d46ae3f)
   1#include "cache.h"
   2#include "commit.h"
   3#include "refs.h"
   4#include "diff.h"
   5#include "revision.h"
   6#include "path-list.h"
   7#include "reflog-walk.h"
   8
   9struct complete_reflogs {
  10        char *ref;
  11        struct reflog_info {
  12                unsigned char osha1[20], nsha1[20];
  13                char *email;
  14                unsigned long timestamp;
  15                int tz;
  16                char *message;
  17        } *items;
  18        int nr, alloc;
  19};
  20
  21static int read_one_reflog(unsigned char *osha1, unsigned char *nsha1,
  22                const char *email, unsigned long timestamp, int tz,
  23                const char *message, void *cb_data)
  24{
  25        struct complete_reflogs *array = cb_data;
  26        struct reflog_info *item;
  27
  28        if (array->nr >= array->alloc) {
  29                array->alloc = alloc_nr(array->nr + 1);
  30                array->items = xrealloc(array->items, array->alloc *
  31                        sizeof(struct reflog_info));
  32        }
  33        item = array->items + array->nr;
  34        memcpy(item->osha1, osha1, 20);
  35        memcpy(item->nsha1, nsha1, 20);
  36        item->email = xstrdup(email);
  37        item->timestamp = timestamp;
  38        item->tz = tz;
  39        item->message = xstrdup(message);
  40        array->nr++;
  41        return 0;
  42}
  43
  44static struct complete_reflogs *read_complete_reflog(const char *ref)
  45{
  46        struct complete_reflogs *reflogs =
  47                xcalloc(sizeof(struct complete_reflogs), 1);
  48        reflogs->ref = xstrdup(ref);
  49        for_each_reflog_ent(ref, read_one_reflog, reflogs);
  50        if (reflogs->nr == 0) {
  51                unsigned char sha1[20];
  52                const char *name = resolve_ref(ref, sha1, 1, NULL);
  53                if (name)
  54                        for_each_reflog_ent(name, read_one_reflog, reflogs);
  55        }
  56        if (reflogs->nr == 0) {
  57                int len = strlen(ref);
  58                char *refname = xmalloc(len + 12);
  59                sprintf(refname, "refs/%s", ref);
  60                for_each_reflog_ent(refname, read_one_reflog, reflogs);
  61                if (reflogs->nr == 0) {
  62                        sprintf(refname, "refs/heads/%s", ref);
  63                        for_each_reflog_ent(refname, read_one_reflog, reflogs);
  64                }
  65                free(refname);
  66        }
  67        return reflogs;
  68}
  69
  70static int get_reflog_recno_by_time(struct complete_reflogs *array,
  71        unsigned long timestamp)
  72{
  73        int i;
  74        for (i = array->nr - 1; i >= 0; i--)
  75                if (timestamp >= array->items[i].timestamp)
  76                        return i;
  77        return -1;
  78}
  79
  80struct commit_info_lifo {
  81        struct commit_info {
  82                struct commit *commit;
  83                void *util;
  84        } *items;
  85        int nr, alloc;
  86};
  87
  88static struct commit_info *get_commit_info(struct commit *commit,
  89                struct commit_info_lifo *lifo, int pop)
  90{
  91        int i;
  92        for (i = 0; i < lifo->nr; i++)
  93                if (lifo->items[i].commit == commit) {
  94                        struct commit_info *result = &lifo->items[i];
  95                        if (pop) {
  96                                if (i + 1 < lifo->nr)
  97                                        memmove(lifo->items + i,
  98                                                lifo->items + i + 1,
  99                                                (lifo->nr - i) *
 100                                                sizeof(struct commit_info));
 101                                lifo->nr--;
 102                        }
 103                        return result;
 104                }
 105        return NULL;
 106}
 107
 108static void add_commit_info(struct commit *commit, void *util,
 109                struct commit_info_lifo *lifo)
 110{
 111        struct commit_info *info;
 112        if (lifo->nr >= lifo->alloc) {
 113                lifo->alloc = alloc_nr(lifo->nr + 1);
 114                lifo->items = xrealloc(lifo->items,
 115                        lifo->alloc * sizeof(struct commit_info));
 116        }
 117        info = lifo->items + lifo->nr;
 118        info->commit = commit;
 119        info->util = util;
 120        lifo->nr++;
 121}
 122
 123struct commit_reflog {
 124        int flag, recno;
 125        struct complete_reflogs *reflogs;
 126};
 127
 128struct reflog_walk_info {
 129        struct commit_info_lifo reflogs;
 130        struct path_list complete_reflogs;
 131        struct commit_reflog *last_commit_reflog;
 132};
 133
 134void init_reflog_walk(struct reflog_walk_info** info)
 135{
 136        *info = xcalloc(sizeof(struct reflog_walk_info), 1);
 137}
 138
 139void add_reflog_for_walk(struct reflog_walk_info *info,
 140                struct commit *commit, const char *name)
 141{
 142        unsigned long timestamp = 0;
 143        int recno = -1;
 144        struct path_list_item *item;
 145        struct complete_reflogs *reflogs;
 146        char *branch, *at = strchr(name, '@');
 147        struct commit_reflog *commit_reflog;
 148
 149        if (commit->object.flags & UNINTERESTING)
 150                die ("Cannot walk reflogs for %s", name);
 151
 152        branch = xstrdup(name);
 153        if (at && at[1] == '{') {
 154                char *ep;
 155                branch[at - name] = '\0';
 156                recno = strtoul(at + 2, &ep, 10);
 157                if (*ep != '}') {
 158                        recno = -1;
 159                        timestamp = approxidate(at + 2);
 160                }
 161        } else
 162                recno = 0;
 163
 164        item = path_list_lookup(branch, &info->complete_reflogs);
 165        if (item)
 166                reflogs = item->util;
 167        else {
 168                if (*branch == '\0') {
 169                        unsigned char sha1[20];
 170                        const char *head = resolve_ref("HEAD", sha1, 0, NULL);
 171                        if (!head)
 172                                die ("No current branch");
 173                        free(branch);
 174                        branch = xstrdup(head);
 175                }
 176                reflogs = read_complete_reflog(branch);
 177                if (!reflogs || reflogs->nr == 0)
 178                        die("No reflogs found for '%s'", branch);
 179                path_list_insert(branch, &info->complete_reflogs)->util
 180                        = reflogs;
 181        }
 182
 183        commit_reflog = xcalloc(sizeof(struct commit_reflog), 1);
 184        if (recno < 0) {
 185                commit_reflog->flag = 1;
 186                commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
 187                if (commit_reflog->recno < 0) {
 188                        free(branch);
 189                        free(commit_reflog);
 190                        return;
 191                }
 192        } else
 193                commit_reflog->recno = reflogs->nr - recno - 1;
 194        commit_reflog->reflogs = reflogs;
 195
 196        add_commit_info(commit, commit_reflog, &info->reflogs);
 197}
 198
 199void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
 200{
 201        struct commit_info *commit_info =
 202                get_commit_info(commit, &info->reflogs, 0);
 203        struct commit_reflog *commit_reflog;
 204        struct reflog_info *reflog;
 205
 206        info->last_commit_reflog = NULL;
 207        if (!commit_info)
 208                return;
 209
 210        commit_reflog = commit_info->util;
 211        if (commit_reflog->recno < 0) {
 212                commit->parents = NULL;
 213                return;
 214        }
 215
 216        reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
 217        info->last_commit_reflog = commit_reflog;
 218        commit_reflog->recno--;
 219        commit_info->commit = (struct commit *)parse_object(reflog->osha1);
 220        if (!commit_info->commit) {
 221                commit->parents = NULL;
 222                return;
 223        }
 224
 225        commit->parents = xcalloc(sizeof(struct commit_list), 1);
 226        commit->parents->item = commit_info->commit;
 227        commit->object.flags &= ~(ADDED | SEEN | SHOWN);
 228}
 229
 230void show_reflog_message(struct reflog_walk_info* info, int oneline)
 231{
 232        if (info && info->last_commit_reflog) {
 233                struct commit_reflog *commit_reflog = info->last_commit_reflog;
 234                struct reflog_info *info;
 235
 236                info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
 237                if (oneline) {
 238                        printf("%s@{", commit_reflog->reflogs->ref);
 239                        if (commit_reflog->flag)
 240                                printf("%s", show_date(info->timestamp, 0, 1));
 241                        else
 242                                printf("%d", commit_reflog->reflogs->nr
 243                                       - 2 - commit_reflog->recno);
 244                        printf("}: %s", info->message);
 245                }
 246                else {
 247                        printf("Reflog: %s@{", commit_reflog->reflogs->ref);
 248                        if (commit_reflog->flag)
 249                                printf("%s", show_rfc2822_date(info->timestamp,
 250                                                               info->tz));
 251                        else
 252                                printf("%d", commit_reflog->reflogs->nr
 253                                       - 2 - commit_reflog->recno);
 254                        printf("} (%s)\nReflog message: %s",
 255                               info->email, info->message);
 256                }
 257        }
 258}