merge-recursive: separate out xdl_merge() interface.
[gitweb.git] / builtin-log.c
index 82c69d1d0593156c5f7034746fe68f5a1a9f7276..469949457f61eee95f6ba801c4f81328a06cffda 100644 (file)
 #include "revision.h"
 #include "log-tree.h"
 #include "builtin.h"
-#include <time.h>
-#include <sys/time.h>
+#include "tag.h"
+#include "reflog-walk.h"
+#include "patch-ids.h"
+
+static int default_show_root = 1;
 
 /* this is in builtin-diff.c */
 void add_head(struct rev_info *revs);
@@ -19,14 +22,27 @@ void add_head(struct rev_info *revs);
 static void cmd_log_init(int argc, const char **argv, const char *prefix,
                      struct rev_info *rev)
 {
+       int i;
+
        rev->abbrev = DEFAULT_ABBREV;
        rev->commit_format = CMIT_FMT_DEFAULT;
        rev->verbose_header = 1;
+       rev->show_root_diff = default_show_root;
        argc = setup_revisions(argc, argv, rev, "HEAD");
        if (rev->diffopt.pickaxe || rev->diffopt.filter)
                rev->always_show_header = 0;
-       if (argc > 1)
-               die("unrecognized argument: %s", argv[1]);
+       for (i = 1; i < argc; i++) {
+               const char *arg = argv[i];
+               if (!prefixcmp(arg, "--encoding=")) {
+                       arg += 11;
+                       if (strcmp(arg, "none"))
+                               git_log_output_encoding = xstrdup(arg);
+                       else
+                               git_log_output_encoding = "";
+               }
+               else
+                       die("unrecognized argument: %s", arg);
+       }
 }
 
 static int cmd_log_walk(struct rev_info *rev)
@@ -34,22 +50,33 @@ static int cmd_log_walk(struct rev_info *rev)
        struct commit *commit;
 
        prepare_revision_walk(rev);
-       setup_pager();
        while ((commit = get_revision(rev)) != NULL) {
                log_tree_commit(rev, commit);
-               free(commit->buffer);
-               commit->buffer = NULL;
+               if (!rev->reflog_info) {
+                       /* we allow cycles in reflog ancestry */
+                       free(commit->buffer);
+                       commit->buffer = NULL;
+               }
                free_commit_list(commit->parents);
                commit->parents = NULL;
        }
        return 0;
 }
 
+static int git_log_config(const char *var, const char *value)
+{
+       if (!strcmp(var, "log.showroot")) {
+               default_show_root = git_config_bool(var, value);
+               return 0;
+       }
+       return git_diff_ui_config(var, value);
+}
+
 int cmd_whatchanged(int argc, const char **argv, const char *prefix)
 {
        struct rev_info rev;
 
-       git_config(git_diff_ui_config);
+       git_config(git_log_config);
        init_revisions(&rev, prefix);
        rev.diff = 1;
        rev.diffopt.recursive = 1;
@@ -60,11 +87,45 @@ int cmd_whatchanged(int argc, const char **argv, const char *prefix)
        return cmd_log_walk(&rev);
 }
 
+static int show_object(const unsigned char *sha1, int suppress_header)
+{
+       unsigned long size;
+       enum object_type type;
+       char *buf = read_sha1_file(sha1, &type, &size);
+       int offset = 0;
+
+       if (!buf)
+               return error("Could not read object %s", sha1_to_hex(sha1));
+
+       if (suppress_header)
+               while (offset < size && buf[offset++] != '\n') {
+                       int new_offset = offset;
+                       while (new_offset < size && buf[new_offset++] != '\n')
+                               ; /* do nothing */
+                       offset = new_offset;
+               }
+
+       if (offset < size)
+               fwrite(buf + offset, size - offset, 1, stdout);
+       free(buf);
+       return 0;
+}
+
+static int show_tree_object(const unsigned char *sha1,
+               const char *base, int baselen,
+               const char *pathname, unsigned mode, int stage)
+{
+       printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
+       return 0;
+}
+
 int cmd_show(int argc, const char **argv, const char *prefix)
 {
        struct rev_info rev;
+       struct object_array_entry *objects;
+       int i, count, ret = 0;
 
-       git_config(git_diff_ui_config);
+       git_config(git_log_config);
        init_revisions(&rev, prefix);
        rev.diff = 1;
        rev.diffopt.recursive = 1;
@@ -74,6 +135,82 @@ int cmd_show(int argc, const char **argv, const char *prefix)
        rev.ignore_merges = 0;
        rev.no_walk = 1;
        cmd_log_init(argc, argv, prefix, &rev);
+
+       count = rev.pending.nr;
+       objects = rev.pending.objects;
+       for (i = 0; i < count && !ret; i++) {
+               struct object *o = objects[i].item;
+               const char *name = objects[i].name;
+               switch (o->type) {
+               case OBJ_BLOB:
+                       ret = show_object(o->sha1, 0);
+                       break;
+               case OBJ_TAG: {
+                       struct tag *t = (struct tag *)o;
+
+                       printf("%stag %s%s\n\n",
+                                       diff_get_color(rev.diffopt.color_diff,
+                                               DIFF_COMMIT),
+                                       t->tag,
+                                       diff_get_color(rev.diffopt.color_diff,
+                                               DIFF_RESET));
+                       ret = show_object(o->sha1, 1);
+                       objects[i].item = (struct object *)t->tagged;
+                       i--;
+                       break;
+               }
+               case OBJ_TREE:
+                       printf("%stree %s%s\n\n",
+                                       diff_get_color(rev.diffopt.color_diff,
+                                               DIFF_COMMIT),
+                                       name,
+                                       diff_get_color(rev.diffopt.color_diff,
+                                               DIFF_RESET));
+                       read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
+                                       show_tree_object);
+                       break;
+               case OBJ_COMMIT:
+                       rev.pending.nr = rev.pending.alloc = 0;
+                       rev.pending.objects = NULL;
+                       add_object_array(o, name, &rev.pending);
+                       ret = cmd_log_walk(&rev);
+                       break;
+               default:
+                       ret = error("Unknown type: %d", o->type);
+               }
+       }
+       free(objects);
+       return ret;
+}
+
+/*
+ * This is equivalent to "git log -g --abbrev-commit --pretty=oneline"
+ */
+int cmd_log_reflog(int argc, const char **argv, const char *prefix)
+{
+       struct rev_info rev;
+
+       git_config(git_log_config);
+       init_revisions(&rev, prefix);
+       init_reflog_walk(&rev.reflog_info);
+       rev.abbrev_commit = 1;
+       rev.verbose_header = 1;
+       cmd_log_init(argc, argv, prefix, &rev);
+
+       /*
+        * This means that we override whatever commit format the user gave
+        * on the cmd line.  Sad, but cmd_log_init() currently doesn't
+        * allow us to set a different default.
+        */
+       rev.commit_format = CMIT_FMT_ONELINE;
+       rev.always_show_header = 1;
+
+       /*
+        * We get called through "git reflog", so unlike the other log
+        * routines, we need to set up our pager manually..
+        */
+       setup_pager();
+
        return cmd_log_walk(&rev);
 }
 
@@ -81,13 +218,16 @@ int cmd_log(int argc, const char **argv, const char *prefix)
 {
        struct rev_info rev;
 
-       git_config(git_diff_ui_config);
+       git_config(git_log_config);
        init_revisions(&rev, prefix);
        rev.always_show_header = 1;
        cmd_log_init(argc, argv, prefix, &rev);
        return cmd_log_walk(&rev);
 }
 
+/* format-patch */
+#define FORMAT_PATCH_NAME_MAX 64
+
 static int istitlechar(char c)
 {
        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
@@ -96,35 +236,50 @@ static int istitlechar(char c)
 
 static char *extra_headers = NULL;
 static int extra_headers_size = 0;
+static const char *fmt_patch_suffix = ".patch";
 
 static int git_format_config(const char *var, const char *value)
 {
        if (!strcmp(var, "format.headers")) {
-               int len = strlen(value);
+               int len;
+
+               if (!value)
+                       die("format.headers without value");
+               len = strlen(value);
                extra_headers_size += len + 1;
-               extra_headers = realloc(extra_headers, extra_headers_size);
+               extra_headers = xrealloc(extra_headers, extra_headers_size);
                extra_headers[extra_headers_size - len - 1] = 0;
                strcat(extra_headers, value);
                return 0;
        }
-       if (!strcmp(var, "diff.color")) {
+       if (!strcmp(var, "format.suffix")) {
+               if (!value)
+                       die("format.suffix without value");
+               fmt_patch_suffix = xstrdup(value);
                return 0;
        }
-       return git_diff_ui_config(var, value);
+       if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
+               return 0;
+       }
+       return git_log_config(var, value);
 }
 
 
 static FILE *realstdout = NULL;
 static const char *output_directory = NULL;
 
-static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
+static int reopen_stdout(struct commit *commit, int nr, int keep_subject)
 {
-       char filename[1024];
+       char filename[PATH_MAX];
        char *sol;
        int len = 0;
+       int suffix_len = strlen(fmt_patch_suffix) + 1;
 
        if (output_directory) {
-               strlcpy(filename, output_directory, 1010);
+               if (strlen(output_directory) >=
+                   sizeof(filename) - FORMAT_PATCH_NAME_MAX - suffix_len)
+                       return error("name of output directory is too long");
+               strlcpy(filename, output_directory, sizeof(filename) - suffix_len);
                len = strlen(filename);
                if (filename[len - 1] != '/')
                        filename[len++] = '/';
@@ -139,7 +294,7 @@ static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 
                sol += 2;
                /* strip [PATCH] or [PATCH blabla] */
-               if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
+               if (!keep_subject && !prefixcmp(sol, "[PATCH")) {
                        char *eos = strchr(sol + 6, ']');
                        if (eos) {
                                while (isspace(*eos))
@@ -148,7 +303,11 @@ static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
                        }
                }
 
-               for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
+               for (j = 0;
+                    j < FORMAT_PATCH_NAME_MAX - suffix_len - 5 &&
+                            len < sizeof(filename) - suffix_len &&
+                            sol[j] && sol[j] != '\n';
+                    j++) {
                        if (istitlechar(sol[j])) {
                                if (space) {
                                        filename[len++] = '-';
@@ -163,28 +322,24 @@ static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
                }
                while (filename[len - 1] == '.' || filename[len - 1] == '-')
                        len--;
+               filename[len] = 0;
        }
-       strcpy(filename + len, ".txt");
+       if (len + suffix_len >= sizeof(filename))
+               return error("Patch pathname too long");
+       strcpy(filename + len, fmt_patch_suffix);
        fprintf(realstdout, "%s\n", filename);
-       freopen(filename, "w", stdout);
-}
+       if (freopen(filename, "w", stdout) == NULL)
+               return error("Cannot open patch file %s",filename);
+       return 0;
 
-static int get_patch_id(struct commit *commit, struct diff_options *options,
-               unsigned char *sha1)
-{
-       diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
-                       "", options);
-       diffcore_std(options);
-       return diff_flush_patch_id(options, sha1);
 }
 
-static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
+static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids, const char *prefix)
 {
        struct rev_info check_rev;
        struct commit *commit;
        struct object *o1, *o2;
        unsigned flags1, flags2;
-       unsigned char sha1[20];
 
        if (rev->pending.nr != 2)
                die("Need exactly one range.");
@@ -197,10 +352,7 @@ static void get_patch_ids(struct rev_info *rev, struct diff_options *options, co
        if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
                die("Not a range.");
 
-       diff_setup(options);
-       options->recursive = 1;
-       if (diff_setup_done(options) < 0)
-               die("diff_setup_done failed");
+       init_patch_ids(ids);
 
        /* given a range a..b get all patch ids for b..a */
        init_revisions(&check_rev, prefix);
@@ -215,8 +367,7 @@ static void get_patch_ids(struct rev_info *rev, struct diff_options *options, co
                if (commit->parents && commit->parents->next)
                        continue;
 
-               if (!get_patch_id(commit, options, sha1))
-                       created_object(sha1, xcalloc(1, sizeof(struct object)));
+               add_commit_patch_id(commit, ids);
        }
 
        /* reset for next revision walk */
@@ -230,7 +381,7 @@ static void get_patch_ids(struct rev_info *rev, struct diff_options *options, co
 
 static void gen_message_id(char *dest, unsigned int length, char *base)
 {
-       const char *committer = git_committer_info(1);
+       const char *committer = git_committer_info(-1);
        const char *email_start = strrchr(committer, '<');
        const char *email_end = strrchr(committer, '>');
        if(!email_start || !email_end || email_start > email_end - 1)
@@ -250,10 +401,11 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
        int numbered = 0;
        int start_number = -1;
        int keep_subject = 0;
+       int subject_prefix = 0;
        int ignore_if_in_upstream = 0;
        int thread = 0;
        const char *in_reply_to = NULL;
-       struct diff_options patch_id_opts;
+       struct patch_ids ids;
        char *add_signoff = NULL;
        char message_id[1024];
        char ref_message_id[1024];
@@ -281,7 +433,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                else if (!strcmp(argv[i], "-n") ||
                                !strcmp(argv[i], "--numbered"))
                        numbered = 1;
-               else if (!strncmp(argv[i], "--start-number=", 15))
+               else if (!prefixcmp(argv[i], "--start-number="))
                        start_number = strtol(argv[i] + 15, NULL, 10);
                else if (!strcmp(argv[i], "--start-number")) {
                        i++;
@@ -307,7 +459,6 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                         !strcmp(argv[i], "-s")) {
                        const char *committer;
                        const char *endpos;
-                       setup_ident();
                        committer = git_committer_info(1);
                        endpos = strchr(committer, '>');
                        if (!endpos)
@@ -316,22 +467,38 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                        memcpy(add_signoff, committer, endpos - committer + 1);
                        add_signoff[endpos - committer + 1] = 0;
                }
-               else if (!strcmp(argv[i], "--attach"))
+               else if (!strcmp(argv[i], "--attach")) {
                        rev.mime_boundary = git_version_string;
-               else if (!strncmp(argv[i], "--attach=", 9))
+                       rev.no_inline = 1;
+               }
+               else if (!prefixcmp(argv[i], "--attach=")) {
+                       rev.mime_boundary = argv[i] + 9;
+                       rev.no_inline = 1;
+               }
+               else if (!strcmp(argv[i], "--inline")) {
+                       rev.mime_boundary = git_version_string;
+                       rev.no_inline = 0;
+               }
+               else if (!prefixcmp(argv[i], "--inline=")) {
                        rev.mime_boundary = argv[i] + 9;
+                       rev.no_inline = 0;
+               }
                else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
                        ignore_if_in_upstream = 1;
                else if (!strcmp(argv[i], "--thread"))
                        thread = 1;
-               else if (!strncmp(argv[i], "--in-reply-to=", 14))
+               else if (!prefixcmp(argv[i], "--in-reply-to="))
                        in_reply_to = argv[i] + 14;
                else if (!strcmp(argv[i], "--in-reply-to")) {
                        i++;
                        if (i == argc)
                                die("Need a Message-Id for --in-reply-to");
                        in_reply_to = argv[i];
-               }
+               } else if (!prefixcmp(argv[i], "--subject-prefix=")) {
+                       subject_prefix = 1;
+                       rev.subject_prefix = argv[i] + 17;
+               } else if (!prefixcmp(argv[i], "--suffix="))
+                       fmt_patch_suffix = argv[i] + 9;
                else
                        argv[j++] = argv[i];
        }
@@ -341,13 +508,21 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                start_number = 1;
        if (numbered && keep_subject)
                die ("-n and -k are mutually exclusive.");
+       if (keep_subject && subject_prefix)
+               die ("--subject-prefix and -k are mutually exclusive.");
 
        argc = setup_revisions(argc, argv, &rev, "HEAD");
        if (argc > 1)
                die ("unrecognized argument: %s", argv[1]);
 
        if (!rev.diffopt.output_format)
-               rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
+               rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_PATCH;
+
+       if (!rev.diffopt.text)
+               rev.diffopt.binary = 1;
+
+       if (!output_directory && !use_stdout)
+               output_directory = prefix;
 
        if (output_directory) {
                if (use_stdout)
@@ -358,31 +533,33 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
        }
 
        if (rev.pending.nr == 1) {
-               rev.pending.objects[0].item->flags |= UNINTERESTING;
-               add_head(&rev);
+               if (rev.max_count < 0) {
+                       rev.pending.objects[0].item->flags |= UNINTERESTING;
+                       add_head(&rev);
+               }
+               /* Otherwise, it is "format-patch -22 HEAD", and
+                * get_revision() would return only the specified count.
+                */
        }
 
        if (ignore_if_in_upstream)
-               get_patch_ids(&rev, &patch_id_opts, prefix);
+               get_patch_ids(&rev, &ids, prefix);
 
        if (!use_stdout)
                realstdout = fdopen(dup(1), "w");
 
        prepare_revision_walk(&rev);
        while ((commit = get_revision(&rev)) != NULL) {
-               unsigned char sha1[20];
-
                /* ignore merges */
                if (commit->parents && commit->parents->next)
                        continue;
 
                if (ignore_if_in_upstream &&
-                               !get_patch_id(commit, &patch_id_opts, sha1) &&
-                               lookup_object(sha1))
+                               has_commit_patch_id(commit, &ids))
                        continue;
 
                nr++;
-               list = realloc(list, nr * sizeof(list[0]));
+               list = xrealloc(list, nr * sizeof(list[0]));
                list[nr - 1] = commit;
        }
        total = nr;
@@ -407,7 +584,8 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                        rev.message_id = message_id;
                }
                if (!use_stdout)
-                       reopen_stdout(commit, rev.nr, keep_subject);
+                       if (reopen_stdout(commit, rev.nr, keep_subject))
+                               die("Failed to create output files");
                shown = log_tree_commit(&rev, commit);
                free(commit->buffer);
                commit->buffer = NULL;
@@ -432,6 +610,113 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
                        fclose(stdout);
        }
        free(list);
+       if (ignore_if_in_upstream)
+               free_patch_ids(&ids);
        return 0;
 }
 
+static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
+{
+       unsigned char sha1[20];
+       if (get_sha1(arg, sha1) == 0) {
+               struct commit *commit = lookup_commit_reference(sha1);
+               if (commit) {
+                       commit->object.flags |= flags;
+                       add_pending_object(revs, &commit->object, arg);
+                       return 0;
+               }
+       }
+       return -1;
+}
+
+static const char cherry_usage[] =
+"git-cherry [-v] <upstream> [<head>] [<limit>]";
+int cmd_cherry(int argc, const char **argv, const char *prefix)
+{
+       struct rev_info revs;
+       struct patch_ids ids;
+       struct commit *commit;
+       struct commit_list *list = NULL;
+       const char *upstream;
+       const char *head = "HEAD";
+       const char *limit = NULL;
+       int verbose = 0;
+
+       if (argc > 1 && !strcmp(argv[1], "-v")) {
+               verbose = 1;
+               argc--;
+               argv++;
+       }
+
+       switch (argc) {
+       case 4:
+               limit = argv[3];
+               /* FALLTHROUGH */
+       case 3:
+               head = argv[2];
+               /* FALLTHROUGH */
+       case 2:
+               upstream = argv[1];
+               break;
+       default:
+               usage(cherry_usage);
+       }
+
+       init_revisions(&revs, prefix);
+       revs.diff = 1;
+       revs.combine_merges = 0;
+       revs.ignore_merges = 1;
+       revs.diffopt.recursive = 1;
+
+       if (add_pending_commit(head, &revs, 0))
+               die("Unknown commit %s", head);
+       if (add_pending_commit(upstream, &revs, UNINTERESTING))
+               die("Unknown commit %s", upstream);
+
+       /* Don't say anything if head and upstream are the same. */
+       if (revs.pending.nr == 2) {
+               struct object_array_entry *o = revs.pending.objects;
+               if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
+                       return 0;
+       }
+
+       get_patch_ids(&revs, &ids, prefix);
+
+       if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
+               die("Unknown commit %s", limit);
+
+       /* reverse the list of commits */
+       prepare_revision_walk(&revs);
+       while ((commit = get_revision(&revs)) != NULL) {
+               /* ignore merges */
+               if (commit->parents && commit->parents->next)
+                       continue;
+
+               commit_list_insert(commit, &list);
+       }
+
+       while (list) {
+               char sign = '+';
+
+               commit = list->item;
+               if (has_commit_patch_id(commit, &ids))
+                       sign = '-';
+
+               if (verbose) {
+                       static char buf[16384];
+                       pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
+                                           buf, sizeof(buf), 0, NULL, NULL, 0);
+                       printf("%c %s %s\n", sign,
+                              sha1_to_hex(commit->object.sha1), buf);
+               }
+               else {
+                       printf("%c %s\n", sign,
+                              sha1_to_hex(commit->object.sha1));
+               }
+
+               list = list->next;
+       }
+
+       free_patch_ids(&ids);
+       return 0;
+}