diff-parseopt: restore -U (no argument) behavior
[git/git.git] / diff.c
diff --git a/diff.c b/diff.c
index dc9965e..0abab4a 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -23,6 +23,7 @@
 #include "argv-array.h"
 #include "graph.h"
 #include "packfile.h"
+#include "parse-options.h"
 #include "help.h"
 
 #ifdef NO_FAST_WORKING_DIRECTORY
@@ -291,7 +292,7 @@ static int parse_color_moved(const char *arg)
                return error(_("color moved setting must be one of 'no', 'default', 'blocks', 'zebra', 'dimmed-zebra', 'plain'"));
 }
 
-static int parse_color_moved_ws(const char *arg)
+static unsigned parse_color_moved_ws(const char *arg)
 {
        int ret = 0;
        struct string_list l = STRING_LIST_INIT_DUP;
@@ -312,15 +313,19 @@ static int parse_color_moved_ws(const char *arg)
                        ret |= XDF_IGNORE_WHITESPACE;
                else if (!strcmp(sb.buf, "allow-indentation-change"))
                        ret |= COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE;
-               else
-                       error(_("ignoring unknown color-moved-ws mode '%s'"), sb.buf);
+               else {
+                       ret |= COLOR_MOVED_WS_ERROR;
+                       error(_("unknown color-moved-ws mode '%s', possible values are 'ignore-space-change', 'ignore-space-at-eol', 'ignore-all-space', 'allow-indentation-change'"), sb.buf);
+               }
 
                strbuf_release(&sb);
        }
 
        if ((ret & COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE) &&
-           (ret & XDF_WHITESPACE_FLAGS))
-               die(_("color-moved-ws: allow-indentation-change cannot be combined with other white space modes"));
+           (ret & XDF_WHITESPACE_FLAGS)) {
+               error(_("color-moved-ws: allow-indentation-change cannot be combined with other white space modes"));
+               ret |= COLOR_MOVED_WS_ERROR;
+       }
 
        string_list_clear(&l, 0);
 
@@ -341,8 +346,8 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
                return 0;
        }
        if (!strcmp(var, "diff.colormovedws")) {
-               int cm = parse_color_moved_ws(value);
-               if (cm < 0)
+               unsigned cm = parse_color_moved_ws(value);
+               if (cm & COLOR_MOVED_WS_ERROR)
                        return -1;
                diff_color_moved_ws_default = cm;
                return 0;
@@ -1637,7 +1642,8 @@ static void emit_hunk_header(struct emit_callback *ecbdata,
        strbuf_release(&msgbuf);
 }
 
-static struct diff_tempfile *claim_diff_tempfile(void) {
+static struct diff_tempfile *claim_diff_tempfile(void)
+{
        int i;
        for (i = 0; i < ARRAY_SIZE(diff_temp); i++)
                if (!diff_temp[i].name)
@@ -3313,14 +3319,14 @@ void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const
                options->b_prefix = b;
 }
 
-struct userdiff_driver *get_textconv(struct index_state *istate,
+struct userdiff_driver *get_textconv(struct repository *r,
                                     struct diff_filespec *one)
 {
        if (!DIFF_FILE_VALID(one))
                return NULL;
 
-       diff_filespec_load_driver(one, istate);
-       return userdiff_get_textconv(one->driver);
+       diff_filespec_load_driver(one, r->index);
+       return userdiff_get_textconv(r, one->driver);
 }
 
 static void builtin_diff(const char *name_a,
@@ -3369,8 +3375,8 @@ static void builtin_diff(const char *name_a,
        }
 
        if (o->flags.allow_textconv) {
-               textconv_one = get_textconv(o->repo->index, one);
-               textconv_two = get_textconv(o->repo->index, two);
+               textconv_one = get_textconv(o->repo, one);
+               textconv_two = get_textconv(o->repo, two);
        }
 
        /* Never use a non-valid filename anywhere if at all possible */
@@ -4420,6 +4426,8 @@ static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
        builtin_checkdiff(name, other, attr_path, p->one, p->two, o);
 }
 
+static void prep_parse_options(struct diff_options *options);
+
 void repo_diff_setup(struct repository *r, struct diff_options *options)
 {
        memcpy(options, &default_diff_options, sizeof(*options));
@@ -4461,6 +4469,8 @@ void repo_diff_setup(struct repository *r, struct diff_options *options)
 
        options->color_moved = diff_color_moved_default;
        options->color_moved_ws_handling = diff_color_moved_ws_default;
+
+       prep_parse_options(options);
 }
 
 void diff_setup_done(struct diff_options *options)
@@ -4564,6 +4574,8 @@ void diff_setup_done(struct diff_options *options)
 
        if (!options->use_color || external_diff())
                options->color_moved = 0;
+
+       FREE_AND_NULL(options->parseopts);
 }
 
 static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val)
@@ -4819,7 +4831,8 @@ static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt)
        return 0;
 }
 
-static void enable_patch_output(int *fmt) {
+static void enable_patch_output(int *fmt)
+{
        *fmt &= ~DIFF_FORMAT_NO_OUTPUT;
        *fmt |= DIFF_FORMAT_PATCH;
 }
@@ -4854,6 +4867,49 @@ static int parse_objfind_opt(struct diff_options *opt, const char *arg)
        return 1;
 }
 
+static int diff_opt_unified(const struct option *opt,
+                           const char *arg, int unset)
+{
+       struct diff_options *options = opt->value;
+       char *s;
+
+       BUG_ON_OPT_NEG(unset);
+
+       if (arg) {
+               options->context = strtol(arg, &s, 10);
+               if (*s)
+                       return error(_("%s expects a numerical value"), "--unified");
+       }
+       enable_patch_output(&options->output_format);
+
+       return 0;
+}
+
+static void prep_parse_options(struct diff_options *options)
+{
+       struct option parseopts[] = {
+               OPT_GROUP(N_("Diff output format options")),
+               OPT_BITOP('p', "patch", &options->output_format,
+                         N_("generate patch"),
+                         DIFF_FORMAT_PATCH, DIFF_FORMAT_NO_OUTPUT),
+               OPT_BITOP('u', NULL, &options->output_format,
+                         N_("generate patch"),
+                         DIFF_FORMAT_PATCH, DIFF_FORMAT_NO_OUTPUT),
+               OPT_CALLBACK_F('U', "unified", options, N_("<n>"),
+                              N_("generate diffs with <n> lines context"),
+                              PARSE_OPT_NONEG | PARSE_OPT_OPTARG, diff_opt_unified),
+               OPT_BOOL('W', "function-context", &options->flags.funccontext,
+                        N_("generate diffs with <n> lines context")),
+               OPT_BIT_F(0, "raw", &options->output_format,
+                         N_("generate the diff in raw format"),
+                         DIFF_FORMAT_RAW, PARSE_OPT_NONEG),
+               OPT_END()
+       };
+
+       ALLOC_ARRAY(options->parseopts, ARRAY_SIZE(parseopts));
+       memcpy(options->parseopts, parseopts, sizeof(parseopts));
+}
+
 int diff_opt_parse(struct diff_options *options,
                   const char **av, int ac, const char *prefix)
 {
@@ -4864,13 +4920,18 @@ int diff_opt_parse(struct diff_options *options,
        if (!prefix)
                prefix = "";
 
+       ac = parse_options(ac, av, prefix, options->parseopts, NULL,
+                          PARSE_OPT_KEEP_DASHDASH |
+                          PARSE_OPT_KEEP_UNKNOWN |
+                          PARSE_OPT_NO_INTERNAL_HELP |
+                          PARSE_OPT_ONE_SHOT |
+                          PARSE_OPT_STOP_AT_NON_OPTION);
+
+       if (ac)
+               return ac;
+
        /* Output format options */
-       if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")
-           || opt_arg(arg, 'U', "unified", &options->context))
-               enable_patch_output(&options->output_format);
-       else if (!strcmp(arg, "--raw"))
-               options->output_format |= DIFF_FORMAT_RAW;
-       else if (!strcmp(arg, "--patch-with-raw")) {
+       if (!strcmp(arg, "--patch-with-raw")) {
                enable_patch_output(&options->output_format);
                options->output_format |= DIFF_FORMAT_RAW;
        } else if (!strcmp(arg, "--numstat"))
@@ -5034,10 +5095,13 @@ int diff_opt_parse(struct diff_options *options,
        else if (skip_prefix(arg, "--color-moved=", &arg)) {
                int cm = parse_color_moved(arg);
                if (cm < 0)
-                       die("bad --color-moved argument: %s", arg);
+                       return error("bad --color-moved argument: %s", arg);
                options->color_moved = cm;
        } else if (skip_prefix(arg, "--color-moved-ws=", &arg)) {
-               options->color_moved_ws_handling = parse_color_moved_ws(arg);
+               unsigned cm = parse_color_moved_ws(arg);
+               if (cm & COLOR_MOVED_WS_ERROR)
+                       return -1;
+               options->color_moved_ws_handling = cm;
        } else if (skip_to_optional_arg_default(arg, "--color-words", &options->word_regex, NULL)) {
                options->use_color = 1;
                options->word_diff = DIFF_WORDS_COLOR;
@@ -5153,12 +5217,6 @@ int diff_opt_parse(struct diff_options *options,
        else if (opt_arg(arg, '\0', "inter-hunk-context",
                         &options->interhunkcontext))
                ;
-       else if (!strcmp(arg, "-W"))
-               options->flags.funccontext = 1;
-       else if (!strcmp(arg, "--function-context"))
-               options->flags.funccontext = 1;
-       else if (!strcmp(arg, "--no-function-context"))
-               options->flags.funccontext = 0;
        else if ((argcount = parse_long_opt("output", av, &optarg))) {
                char *path = prefix_filename(prefix, optarg);
                options->file = xfopen(path, "w");
@@ -6434,7 +6492,7 @@ int textconv_object(struct repository *r,
 
        df = alloc_filespec(path);
        fill_filespec(df, oid, oid_valid, mode);
-       textconv = get_textconv(r->index, df);
+       textconv = get_textconv(r, df);
        if (!textconv) {
                free_filespec(df);
                return 0;