t4042: abstract away SHA-1-specific constants
[gitweb.git] / diff.c
diff --git a/diff.c b/diff.c
index e9d0e38123a59f2ca54674115df4140836b98f18..1289df4b1f9f395010e475073c2c5e5ce43976a7 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1504,7 +1504,7 @@ struct diff_words_style_elem {
 
 struct diff_words_style {
        enum diff_words_type type;
-       struct diff_words_style_elem new, old, ctx;
+       struct diff_words_style_elem new_word, old_word, ctx;
        const char *newline;
 };
 
@@ -1655,12 +1655,12 @@ static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len)
        }
        if (minus_begin != minus_end) {
                fn_out_diff_words_write_helper(diff_words->opt,
-                               &style->old, style->newline,
+                               &style->old_word, style->newline,
                                minus_end - minus_begin, minus_begin);
        }
        if (plus_begin != plus_end) {
                fn_out_diff_words_write_helper(diff_words->opt,
-                               &style->new, style->newline,
+                               &style->new_word, style->newline,
                                plus_end - plus_begin, plus_begin);
        }
 
@@ -1758,7 +1758,7 @@ static void diff_words_show(struct diff_words_data *diff_words)
                emit_diff_symbol(diff_words->opt, DIFF_SYMBOL_WORD_DIFF,
                                 line_prefix, strlen(line_prefix), 0);
                fn_out_diff_words_write_helper(diff_words->opt,
-                       &style->old, style->newline,
+                       &style->old_word, style->newline,
                        diff_words->minus.text.size,
                        diff_words->minus.text.ptr);
                diff_words->minus.text.size = 0;
@@ -1883,8 +1883,8 @@ static void init_diff_words_data(struct emit_callback *ecbdata,
        }
        if (want_color(o->use_color)) {
                struct diff_words_style *st = ecbdata->diff_words->style;
-               st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD);
-               st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW);
+               st->old_word.color = diff_get_color_opt(o, DIFF_FILE_OLD);
+               st->new_word.color = diff_get_color_opt(o, DIFF_FILE_NEW);
                st->ctx.color = diff_get_color_opt(o, DIFF_CONTEXT);
        }
 }
@@ -2045,11 +2045,10 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
        }
 }
 
-static char *pprint_rename(const char *a, const char *b)
+static void pprint_rename(struct strbuf *name, const char *a, const char *b)
 {
-       const char *old = a;
-       const char *new = b;
-       struct strbuf name = STRBUF_INIT;
+       const char *old_name = a;
+       const char *new_name = b;
        int pfx_length, sfx_length;
        int pfx_adjust_for_slash;
        int len_a = strlen(a);
@@ -2059,24 +2058,24 @@ static char *pprint_rename(const char *a, const char *b)
        int qlen_b = quote_c_style(b, NULL, NULL, 0);
 
        if (qlen_a || qlen_b) {
-               quote_c_style(a, &name, NULL, 0);
-               strbuf_addstr(&name, " => ");
-               quote_c_style(b, &name, NULL, 0);
-               return strbuf_detach(&name, NULL);
+               quote_c_style(a, name, NULL, 0);
+               strbuf_addstr(name, " => ");
+               quote_c_style(b, name, NULL, 0);
+               return;
        }
 
        /* Find common prefix */
        pfx_length = 0;
-       while (*old && *new && *old == *new) {
-               if (*old == '/')
-                       pfx_length = old - a + 1;
-               old++;
-               new++;
+       while (*old_name && *new_name && *old_name == *new_name) {
+               if (*old_name == '/')
+                       pfx_length = old_name - a + 1;
+               old_name++;
+               new_name++;
        }
 
        /* Find common suffix */
-       old = a + len_a;
-       new = b + len_b;
+       old_name = a + len_a;
+       new_name = b + len_b;
        sfx_length = 0;
        /*
         * If there is a common prefix, it must end in a slash.  In
@@ -2087,13 +2086,13 @@ static char *pprint_rename(const char *a, const char *b)
         * underrun the input strings.
         */
        pfx_adjust_for_slash = (pfx_length ? 1 : 0);
-       while (a + pfx_length - pfx_adjust_for_slash <= old &&
-              b + pfx_length - pfx_adjust_for_slash <= new &&
-              *old == *new) {
-               if (*old == '/')
-                       sfx_length = len_a - (old - a);
-               old--;
-               new--;
+       while (a + pfx_length - pfx_adjust_for_slash <= old_name &&
+              b + pfx_length - pfx_adjust_for_slash <= new_name &&
+              *old_name == *new_name) {
+               if (*old_name == '/')
+                       sfx_length = len_a - (old_name - a);
+               old_name--;
+               new_name--;
        }
 
        /*
@@ -2109,19 +2108,18 @@ static char *pprint_rename(const char *a, const char *b)
        if (b_midlen < 0)
                b_midlen = 0;
 
-       strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7);
+       strbuf_grow(name, pfx_length + a_midlen + b_midlen + sfx_length + 7);
        if (pfx_length + sfx_length) {
-               strbuf_add(&name, a, pfx_length);
-               strbuf_addch(&name, '{');
+               strbuf_add(name, a, pfx_length);
+               strbuf_addch(name, '{');
        }
-       strbuf_add(&name, a + pfx_length, a_midlen);
-       strbuf_addstr(&name, " => ");
-       strbuf_add(&name, b + pfx_length, b_midlen);
+       strbuf_add(name, a + pfx_length, a_midlen);
+       strbuf_addstr(name, " => ");
+       strbuf_add(name, b + pfx_length, b_midlen);
        if (pfx_length + sfx_length) {
-               strbuf_addch(&name, '}');
-               strbuf_add(&name, a + len_a - sfx_length, sfx_length);
+               strbuf_addch(name, '}');
+               strbuf_add(name, a + len_a - sfx_length, sfx_length);
        }
-       return strbuf_detach(&name, NULL);
 }
 
 struct diffstat_t {
@@ -2131,6 +2129,7 @@ struct diffstat_t {
                char *from_name;
                char *name;
                char *print_name;
+               const char *comments;
                unsigned is_unmerged:1;
                unsigned is_binary:1;
                unsigned is_renamed:1;
@@ -2197,23 +2196,20 @@ static void show_graph(struct strbuf *out, char ch, int cnt,
 
 static void fill_print_name(struct diffstat_file *file)
 {
-       char *pname;
+       struct strbuf pname = STRBUF_INIT;
 
        if (file->print_name)
                return;
 
-       if (!file->is_renamed) {
-               struct strbuf buf = STRBUF_INIT;
-               if (quote_c_style(file->name, &buf, NULL, 0)) {
-                       pname = strbuf_detach(&buf, NULL);
-               } else {
-                       pname = file->name;
-                       strbuf_release(&buf);
-               }
-       } else {
-               pname = pprint_rename(file->from_name, file->name);
-       }
-       file->print_name = pname;
+       if (file->is_renamed)
+               pprint_rename(&pname, file->from_name, file->name);
+       else
+               quote_c_style(file->name, &pname, NULL, 0);
+
+       if (file->comments)
+               strbuf_addf(&pname, " (%s)", file->comments);
+
+       file->print_name = strbuf_detach(&pname, NULL);
 }
 
 static void print_stat_summary_inserts_deletes(struct diff_options *options,
@@ -2594,14 +2590,14 @@ struct dirstat_dir {
 static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir,
                unsigned long changed, const char *base, int baselen)
 {
-       unsigned long this_dir = 0;
+       unsigned long sum_changes = 0;
        unsigned int sources = 0;
        const char *line_prefix = diff_line_prefix(opt);
 
        while (dir->nr) {
                struct dirstat_file *f = dir->files;
                int namelen = strlen(f->name);
-               unsigned long this;
+               unsigned long changes;
                char *slash;
 
                if (namelen < baselen)
@@ -2611,15 +2607,15 @@ static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir,
                slash = strchr(f->name + baselen, '/');
                if (slash) {
                        int newbaselen = slash + 1 - f->name;
-                       this = gather_dirstat(opt, dir, changed, f->name, newbaselen);
+                       changes = gather_dirstat(opt, dir, changed, f->name, newbaselen);
                        sources++;
                } else {
-                       this = f->changed;
+                       changes = f->changed;
                        dir->files++;
                        dir->nr--;
                        sources += 2;
                }
-               this_dir += this;
+               sum_changes += changes;
        }
 
        /*
@@ -2629,8 +2625,8 @@ static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir,
         *    under this directory (sources == 1).
         */
        if (baselen && sources != 1) {
-               if (this_dir) {
-                       int permille = this_dir * 1000 / changed;
+               if (sum_changes) {
+                       int permille = sum_changes * 1000 / changed;
                        if (permille >= dir->permille) {
                                fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix,
                                        permille / 10, permille % 10, baselen, base);
@@ -2639,7 +2635,7 @@ static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir,
                        }
                }
        }
-       return this_dir;
+       return sum_changes;
 }
 
 static int dirstat_compare(const void *_a, const void *_b)
@@ -2797,8 +2793,7 @@ static void free_diffstat_info(struct diffstat_t *diffstat)
        int i;
        for (i = 0; i < diffstat->nr; i++) {
                struct diffstat_file *f = diffstat->files[i];
-               if (f->name != f->print_name)
-                       free(f->print_name);
+               free(f->print_name);
                free(f->name);
                free(f->from_name);
                free(f);
@@ -3248,6 +3243,32 @@ static void builtin_diff(const char *name_a,
        return;
 }
 
+static char *get_compact_summary(const struct diff_filepair *p, int is_renamed)
+{
+       if (!is_renamed) {
+               if (p->status == DIFF_STATUS_ADDED) {
+                       if (S_ISLNK(p->two->mode))
+                               return "new +l";
+                       else if ((p->two->mode & 0777) == 0755)
+                               return "new +x";
+                       else
+                               return "new";
+               } else if (p->status == DIFF_STATUS_DELETED)
+                       return "gone";
+       }
+       if (S_ISLNK(p->one->mode) && !S_ISLNK(p->two->mode))
+               return "mode -l";
+       else if (!S_ISLNK(p->one->mode) && S_ISLNK(p->two->mode))
+               return "mode +l";
+       else if ((p->one->mode & 0777) == 0644 &&
+                (p->two->mode & 0777) == 0755)
+               return "mode +x";
+       else if ((p->one->mode & 0777) == 0755 &&
+                (p->two->mode & 0777) == 0644)
+               return "mode -x";
+       return NULL;
+}
+
 static void builtin_diffstat(const char *name_a, const char *name_b,
                             struct diff_filespec *one,
                             struct diff_filespec *two,
@@ -3267,6 +3288,8 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
 
        data = diffstat_add(diffstat, name_a, name_b);
        data->is_interesting = p->status != DIFF_STATUS_UNKNOWN;
+       if (o->flags.stat_with_summary)
+               data->comments = get_compact_summary(p, data->is_renamed);
 
        if (!one || !two) {
                data->is_unmerged = 1;
@@ -3520,13 +3543,13 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
 {
        int size_only = flags & CHECK_SIZE_ONLY;
        int err = 0;
+       int conv_flags = global_conv_flags_eol;
        /*
         * demote FAIL to WARN to allow inspecting the situation
         * instead of refusing.
         */
-       enum safe_crlf crlf_warn = (safe_crlf == SAFE_CRLF_FAIL
-                                   ? SAFE_CRLF_WARN
-                                   : safe_crlf);
+       if (conv_flags & CONV_EOL_RNDTRP_DIE)
+               conv_flags = CONV_EOL_RNDTRP_WARN;
 
        if (!DIFF_FILE_VALID(s))
                die("internal error: asking to populate invalid file.");
@@ -3603,7 +3626,7 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
                /*
                 * Convert from working tree format to canonical git format
                 */
-               if (convert_to_git(&the_index, s->path, s->data, s->size, &buf, crlf_warn)) {
+               if (convert_to_git(&the_index, s->path, s->data, s->size, &buf, conv_flags)) {
                        size_t size = 0;
                        munmap(s->data, s->size);
                        s->should_munmap = 0;
@@ -3615,7 +3638,7 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
        else {
                enum object_type type;
                if (size_only || (flags & CHECK_BINARY)) {
-                       type = sha1_object_info(s->oid.hash, &s->size);
+                       type = oid_object_info(&s->oid, &s->size);
                        if (type < 0)
                                die("unable to read %s",
                                    oid_to_hex(&s->oid));
@@ -3626,7 +3649,7 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags)
                                return 0;
                        }
                }
-               s->data = read_sha1_file(s->oid.hash, &type, &s->size);
+               s->data = read_object_file(&s->oid, &type, &s->size);
                if (!s->data)
                        die("unable to read %s", oid_to_hex(&s->oid));
                s->should_free = 1;
@@ -3660,15 +3683,15 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
                           int mode)
 {
        struct strbuf buf = STRBUF_INIT;
-       struct strbuf template = STRBUF_INIT;
+       struct strbuf tempfile = STRBUF_INIT;
        char *path_dup = xstrdup(path);
        const char *base = basename(path_dup);
 
        /* Generate "XXXXXX_basename.ext" */
-       strbuf_addstr(&template, "XXXXXX_");
-       strbuf_addstr(&template, base);
+       strbuf_addstr(&tempfile, "XXXXXX_");
+       strbuf_addstr(&tempfile, base);
 
-       temp->tempfile = mks_tempfile_ts(template.buf, strlen(base) + 1);
+       temp->tempfile = mks_tempfile_ts(tempfile.buf, strlen(base) + 1);
        if (!temp->tempfile)
                die_errno("unable to create temp-file");
        if (convert_to_working_tree(path,
@@ -3683,7 +3706,7 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
        oid_to_hex_r(temp->hex, oid);
        xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode);
        strbuf_release(&buf);
-       strbuf_release(&template);
+       strbuf_release(&tempfile);
        free(path_dup);
 }
 
@@ -3811,7 +3834,7 @@ static int similarity_index(struct diff_filepair *p)
 static const char *diff_abbrev_oid(const struct object_id *oid, int abbrev)
 {
        if (startup_info->have_repository)
-               return find_unique_abbrev(oid->hash, abbrev);
+               return find_unique_abbrev(oid, abbrev);
        else {
                char *hex = oid_to_hex(oid);
                if (abbrev < 0)
@@ -4086,6 +4109,7 @@ void diff_setup(struct diff_options *options)
        options->interhunkcontext = diff_interhunk_context_default;
        options->ws_error_highlight = ws_error_highlight_default;
        options->flags.rename_empty = 1;
+       options->objfind = NULL;
 
        /* pathchange left =NULL by default */
        options->change = diff_change;
@@ -4110,22 +4134,20 @@ void diff_setup(struct diff_options *options)
 
 void diff_setup_done(struct diff_options *options)
 {
-       int count = 0;
+       unsigned check_mask = DIFF_FORMAT_NAME |
+                             DIFF_FORMAT_NAME_STATUS |
+                             DIFF_FORMAT_CHECKDIFF |
+                             DIFF_FORMAT_NO_OUTPUT;
 
        if (options->set_default)
                options->set_default(options);
 
-       if (options->output_format & DIFF_FORMAT_NAME)
-               count++;
-       if (options->output_format & DIFF_FORMAT_NAME_STATUS)
-               count++;
-       if (options->output_format & DIFF_FORMAT_CHECKDIFF)
-               count++;
-       if (options->output_format & DIFF_FORMAT_NO_OUTPUT)
-               count++;
-       if (count > 1)
+       if (HAS_MULTI_BITS(options->output_format & check_mask))
                die(_("--name-only, --name-status, --check and -s are mutually exclusive"));
 
+       if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK))
+               die(_("-G, -S and --find-object are mutually exclusive"));
+
        /*
         * Most of the time we can say "there are changes"
         * only by checking if there are changed paths, but
@@ -4175,7 +4197,7 @@ void diff_setup_done(struct diff_options *options)
        /*
         * Also pickaxe would not work very well if you do not say recursive
         */
-       if (options->pickaxe)
+       if (options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK)
                options->flags.recursive = 1;
        /*
         * When patches are generated, submodules diffed against the work tree
@@ -4489,6 +4511,23 @@ static int parse_ws_error_highlight_opt(struct diff_options *opt, const char *ar
        return 1;
 }
 
+static int parse_objfind_opt(struct diff_options *opt, const char *arg)
+{
+       struct object_id oid;
+
+       if (get_oid(arg, &oid))
+               return error("unable to resolve '%s'", arg);
+
+       if (!opt->objfind)
+               opt->objfind = xcalloc(1, sizeof(*opt->objfind));
+
+       opt->pickaxe_opts |= DIFF_PICKAXE_KIND_OBJFIND;
+       opt->flags.recursive = 1;
+       opt->flags.tree_in_recursive = 1;
+       oidset_insert(opt->objfind, &oid);
+       return 1;
+}
+
 int diff_opt_parse(struct diff_options *options,
                   const char **av, int ac, const char *prefix)
 {
@@ -4537,6 +4576,11 @@ int diff_opt_parse(struct diff_options *options,
        else if (starts_with(arg, "--stat"))
                /* --stat, --stat-width, --stat-name-width, or --stat-count */
                return stat_opt(options, av);
+       else if (!strcmp(arg, "--compact-summary")) {
+                options->flags.stat_with_summary = 1;
+                options->output_format |= DIFF_FORMAT_DIFFSTAT;
+       } else if (!strcmp(arg, "--no-compact-summary"))
+                options->flags.stat_with_summary = 0;
 
        /* renames options */
        else if (starts_with(arg, "-B") ||
@@ -4736,7 +4780,8 @@ int diff_opt_parse(struct diff_options *options,
        else if ((argcount = short_opt('O', av, &optarg))) {
                options->orderfile = prefix_filename(prefix, optarg);
                return argcount;
-       }
+       } else if (skip_prefix(arg, "--find-object=", &arg))
+               return parse_objfind_opt(options, arg);
        else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) {
                int offending = parse_diff_filter_opt(optarg, options);
                if (offending)
@@ -5224,10 +5269,12 @@ static void show_rename_copy(struct diff_options *opt, const char *renamecopy,
                struct diff_filepair *p)
 {
        struct strbuf sb = STRBUF_INIT;
-       char *names = pprint_rename(p->one->path, p->two->path);
+       struct strbuf names = STRBUF_INIT;
+
+       pprint_rename(&names, p->one->path, p->two->path);
        strbuf_addf(&sb, " %s %s (%d%%)\n",
-                       renamecopy, names, similarity_index(p));
-       free(names);
+                   renamecopy, names.buf, similarity_index(p));
+       strbuf_release(&names);
        emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
                                 sb.buf, sb.len, 0);
        show_mode_change(opt, p, 0);
@@ -5784,7 +5831,7 @@ void diffcore_std(struct diff_options *options)
                if (options->break_opt != -1)
                        diffcore_merge_broken();
        }
-       if (options->pickaxe)
+       if (options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK)
                diffcore_pickaxe(options);
        if (options->orderfile)
                diffcore_order(options->orderfile);