replace_object: convert struct replace_object to object_id
[gitweb.git] / diff.c
diff --git a/diff.c b/diff.c
index b3ef25c3452c45227ac851dc730300d07c489bd0..8184ecfc2abdbf76006894d3cb2c3b21279c9576 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -246,7 +246,7 @@ static int parse_ws_error_highlight(const char *arg)
  */
 void init_diff_ui_defaults(void)
 {
-       diff_detect_rename_default = 1;
+       diff_detect_rename_default = DIFF_DETECT_RENAME;
 }
 
 int git_diff_heuristic_config(const char *var, const char *value, void *cb)
@@ -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);
        }
 }
@@ -2047,8 +2047,8 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 
 static char *pprint_rename(const char *a, const char *b)
 {
-       const char *old = a;
-       const char *new = b;
+       const char *old_name = a;
+       const char *new_name = b;
        struct strbuf name = STRBUF_INIT;
        int pfx_length, sfx_length;
        int pfx_adjust_for_slash;
@@ -2067,16 +2067,16 @@ static char *pprint_rename(const char *a, const char *b)
 
        /* 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 +2087,13 @@ 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--;
        }
 
        /*
@@ -2594,14 +2594,14 @@ 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 +2611,15 @@ 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 +2629,8 @@ 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 +2639,7 @@ 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)
@@ -3210,6 +3210,8 @@ static void builtin_diff(const char *name_a,
                ecbdata.opt = o;
                ecbdata.header = header.len ? &header : NULL;
                xpp.flags = o->xdl_opts;
+               xpp.anchors = o->anchors;
+               xpp.anchors_nr = o->anchors_nr;
                xecfg.ctxlen = o->context;
                xecfg.interhunkctxlen = o->interhunkcontext;
                xecfg.flags = XDL_EMIT_FUNCNAMES;
@@ -3302,6 +3304,8 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
                memset(&xpp, 0, sizeof(xpp));
                memset(&xecfg, 0, sizeof(xecfg));
                xpp.flags = o->xdl_opts;
+               xpp.anchors = o->anchors;
+               xpp.anchors_nr = o->anchors_nr;
                xecfg.ctxlen = o->context;
                xecfg.interhunkctxlen = o->interhunkcontext;
                if (xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat,
@@ -3516,13 +3520,13 @@ 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.");
@@ -3599,7 +3603,7 @@ 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;
@@ -3656,15 +3660,15 @@ 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,
@@ -3679,7 +3683,7 @@ 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);
 }
 
@@ -3807,7 +3811,7 @@ 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)
@@ -4082,6 +4086,7 @@ 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;
@@ -4106,22 +4111,20 @@ 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
@@ -4171,7 +4174,7 @@ 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
@@ -4485,6 +4488,23 @@ 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)
 {
@@ -4508,17 +4528,12 @@ int diff_opt_parse(struct diff_options *options,
                options->output_format |= DIFF_FORMAT_NUMSTAT;
        else if (!strcmp(arg, "--shortstat"))
                options->output_format |= DIFF_FORMAT_SHORTSTAT;
-       else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat"))
-               return parse_dirstat_opt(options, "");
-       else if (skip_prefix(arg, "-X", &arg))
-               return parse_dirstat_opt(options, arg);
-       else if (skip_prefix(arg, "--dirstat=", &arg))
+       else if (skip_prefix(arg, "-X", &arg) ||
+                skip_to_optional_arg(arg, "--dirstat", &arg))
                return parse_dirstat_opt(options, arg);
        else if (!strcmp(arg, "--cumulative"))
                return parse_dirstat_opt(options, "cumulative");
-       else if (!strcmp(arg, "--dirstat-by-file"))
-               return parse_dirstat_opt(options, "files");
-       else if (skip_prefix(arg, "--dirstat-by-file=", &arg)) {
+       else if (skip_to_optional_arg(arg, "--dirstat-by-file", &arg)) {
                parse_dirstat_opt(options, "files");
                return parse_dirstat_opt(options, arg);
        }
@@ -4540,13 +4555,13 @@ int diff_opt_parse(struct diff_options *options,
                return stat_opt(options, av);
 
        /* renames options */
-       else if (starts_with(arg, "-B") || starts_with(arg, "--break-rewrites=") ||
-                !strcmp(arg, "--break-rewrites")) {
+       else if (starts_with(arg, "-B") ||
+                skip_to_optional_arg(arg, "--break-rewrites", NULL)) {
                if ((options->break_opt = diff_scoreopt_parse(arg)) == -1)
                        return error("invalid argument to -B: %s", arg+2);
        }
-       else if (starts_with(arg, "-M") || starts_with(arg, "--find-renames=") ||
-                !strcmp(arg, "--find-renames")) {
+       else if (starts_with(arg, "-M") ||
+                skip_to_optional_arg(arg, "--find-renames", NULL)) {
                if ((options->rename_score = diff_scoreopt_parse(arg)) == -1)
                        return error("invalid argument to -M: %s", arg+2);
                options->detect_rename = DIFF_DETECT_RENAME;
@@ -4554,8 +4569,8 @@ int diff_opt_parse(struct diff_options *options,
        else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) {
                options->irreversible_delete = 1;
        }
-       else if (starts_with(arg, "-C") || starts_with(arg, "--find-copies=") ||
-                !strcmp(arg, "--find-copies")) {
+       else if (starts_with(arg, "-C") ||
+                skip_to_optional_arg(arg, "--find-copies", NULL)) {
                if (options->detect_rename == DIFF_DETECT_COPY)
                        options->flags.find_copies_harder = 1;
                if ((options->rename_score = diff_scoreopt_parse(arg)) == -1)
@@ -4568,11 +4583,10 @@ int diff_opt_parse(struct diff_options *options,
                options->flags.rename_empty = 1;
        else if (!strcmp(arg, "--no-rename-empty"))
                options->flags.rename_empty = 0;
-       else if (!strcmp(arg, "--relative"))
+       else if (skip_to_optional_arg_default(arg, "--relative", &arg, NULL)) {
                options->flags.relative_name = 1;
-       else if (skip_prefix(arg, "--relative=", &arg)) {
-               options->flags.relative_name = 1;
-               options->prefix = arg;
+               if (arg)
+                       options->prefix = arg;
        }
 
        /* xdiff options */
@@ -4594,9 +4608,18 @@ int diff_opt_parse(struct diff_options *options,
                DIFF_XDL_SET(options, INDENT_HEURISTIC);
        else if (!strcmp(arg, "--no-indent-heuristic"))
                DIFF_XDL_CLR(options, INDENT_HEURISTIC);
-       else if (!strcmp(arg, "--patience"))
+       else if (!strcmp(arg, "--patience")) {
+               int i;
                options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
-       else if (!strcmp(arg, "--histogram"))
+               /*
+                * Both --patience and --anchored use PATIENCE_DIFF
+                * internally, so remove any anchors previously
+                * specified.
+                */
+               for (i = 0; i < options->anchors_nr; i++)
+                       free(options->anchors[i]);
+               options->anchors_nr = 0;
+       } else if (!strcmp(arg, "--histogram"))
                options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
        else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
                long value = parse_algorithm_value(optarg);
@@ -4608,6 +4631,11 @@ int diff_opt_parse(struct diff_options *options,
                options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
                options->xdl_opts |= value;
                return argcount;
+       } else if (skip_prefix(arg, "--anchored=", &arg)) {
+               options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
+               ALLOC_GROW(options->anchors, options->anchors_nr + 1,
+                          options->anchors_alloc);
+               options->anchors[options->anchors_nr++] = xstrdup(arg);
        }
 
        /* flags options */
@@ -4628,9 +4656,7 @@ int diff_opt_parse(struct diff_options *options,
        else if (!strcmp(arg, "--no-follow")) {
                options->flags.follow_renames = 0;
                options->flags.default_follow_renames = 0;
-       } else if (!strcmp(arg, "--color"))
-               options->use_color = 1;
-       else if (skip_prefix(arg, "--color=", &arg)) {
+       } else if (skip_to_optional_arg_default(arg, "--color", &arg, "always")) {
                int value = git_config_colorbool(NULL, arg);
                if (value < 0)
                        return error("option `color' expects \"always\", \"auto\", or \"never\"");
@@ -4650,14 +4676,9 @@ int diff_opt_parse(struct diff_options *options,
                if (cm < 0)
                        die("bad --color-moved argument: %s", arg);
                options->color_moved = cm;
-       } else if (!strcmp(arg, "--color-words")) {
-               options->use_color = 1;
-               options->word_diff = DIFF_WORDS_COLOR;
-       }
-       else if (skip_prefix(arg, "--color-words=", &arg)) {
+       } else if (skip_to_optional_arg_default(arg, "--color-words", &options->word_regex, NULL)) {
                options->use_color = 1;
                options->word_diff = DIFF_WORDS_COLOR;
-               options->word_regex = arg;
        }
        else if (!strcmp(arg, "--word-diff")) {
                if (options->word_diff == DIFF_WORDS_NONE)
@@ -4696,15 +4717,10 @@ int diff_opt_parse(struct diff_options *options,
                options->flags.textconv_set_via_cmdline = 1;
        } else if (!strcmp(arg, "--no-textconv"))
                options->flags.allow_textconv = 0;
-       else if (!strcmp(arg, "--ignore-submodules")) {
-               options->flags.override_submodule_config = 1;
-               handle_ignore_submodules_arg(options, "all");
-       } else if (skip_prefix(arg, "--ignore-submodules=", &arg)) {
+       else if (skip_to_optional_arg_default(arg, "--ignore-submodules", &arg, "all")) {
                options->flags.override_submodule_config = 1;
                handle_ignore_submodules_arg(options, arg);
-       } else if (!strcmp(arg, "--submodule"))
-               options->submodule_format = DIFF_SUBMODULE_LOG;
-       else if (skip_prefix(arg, "--submodule=", &arg))
+       } else if (skip_to_optional_arg_default(arg, "--submodule", &arg, "log"))
                return parse_submodule_opt(options, arg);
        else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
                return parse_ws_error_highlight_opt(options, arg);
@@ -4736,7 +4752,8 @@ 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)
@@ -4902,14 +4919,20 @@ const char *diff_aligned_abbrev(const struct object_id *oid, int len)
        int abblen;
        const char *abbrev;
 
+       /* Do we want all 40 hex characters? */
        if (len == GIT_SHA1_HEXSZ)
                return oid_to_hex(oid);
 
+       /* An abbreviated value is fine, possibly followed by an ellipsis. */
        abbrev = diff_abbrev_oid(oid, len);
+
+       if (!print_sha1_ellipsis())
+               return abbrev;
+
        abblen = strlen(abbrev);
 
        /*
-        * In well-behaved cases, where the abbbreviated result is the
+        * In well-behaved cases, where the abbreviated result is the
         * same as the requested length, append three dots after the
         * abbreviation (hence the whole logic is limited to the case
         * where abblen < 37); when the actual abbreviated result is a
@@ -5448,6 +5471,7 @@ N_("you may want to set your %s variable to at least "
 
 void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc)
 {
+       fflush(stdout);
        if (degraded_cc)
                warning(_(degrade_cc_to_c_warning));
        else if (needed)
@@ -5777,7 +5801,7 @@ 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);