Git 2.5.0-rc1
[gitweb.git] / diff.c
diff --git a/diff.c b/diff.c
index c575c452f16fb781d86f5fe748a216c192c5ad41..87b16d5613adb9046501a1b0b285f9f954abbaa5 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -42,7 +42,7 @@ static long diff_algorithm;
 
 static char diff_colors[][COLOR_MAXLEN] = {
        GIT_COLOR_RESET,
-       GIT_COLOR_NORMAL,       /* PLAIN */
+       GIT_COLOR_NORMAL,       /* CONTEXT */
        GIT_COLOR_BOLD,         /* METAINFO */
        GIT_COLOR_CYAN,         /* FRAGINFO */
        GIT_COLOR_RED,          /* OLD */
@@ -54,8 +54,8 @@ static char diff_colors[][COLOR_MAXLEN] = {
 
 static int parse_diff_color_slot(const char *var)
 {
-       if (!strcasecmp(var, "plain"))
-               return DIFF_PLAIN;
+       if (!strcasecmp(var, "context") || !strcasecmp(var, "plain"))
+               return DIFF_CONTEXT;
        if (!strcasecmp(var, "meta"))
                return DIFF_METAINFO;
        if (!strcasecmp(var, "frag"))
@@ -478,48 +478,63 @@ static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line
        return ws_blank_line(line, len, ecbdata->ws_rule);
 }
 
-static void emit_add_line(const char *reset,
-                         struct emit_callback *ecbdata,
-                         const char *line, int len)
+static void emit_line_checked(const char *reset,
+                             struct emit_callback *ecbdata,
+                             const char *line, int len,
+                             enum color_diff color,
+                             unsigned ws_error_highlight,
+                             char sign)
 {
-       const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
-       const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW);
+       const char *set = diff_get_color(ecbdata->color_diff, color);
+       const char *ws = NULL;
 
-       if (!*ws)
-               emit_line_0(ecbdata->opt, set, reset, '+', line, len);
-       else if (new_blank_line_at_eof(ecbdata, line, len))
+       if (ecbdata->opt->ws_error_highlight & ws_error_highlight) {
+               ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
+               if (!*ws)
+                       ws = NULL;
+       }
+
+       if (!ws)
+               emit_line_0(ecbdata->opt, set, reset, sign, line, len);
+       else if (sign == '+' && new_blank_line_at_eof(ecbdata, line, len))
                /* Blank line at EOF - paint '+' as well */
-               emit_line_0(ecbdata->opt, ws, reset, '+', line, len);
+               emit_line_0(ecbdata->opt, ws, reset, sign, line, len);
        else {
                /* Emit just the prefix, then the rest. */
-               emit_line_0(ecbdata->opt, set, reset, '+', "", 0);
+               emit_line_0(ecbdata->opt, set, reset, sign, "", 0);
                ws_check_emit(line, len, ecbdata->ws_rule,
                              ecbdata->opt->file, set, reset, ws);
        }
 }
 
-static void emit_del_line(const char *reset,
+static void emit_add_line(const char *reset,
                          struct emit_callback *ecbdata,
                          const char *line, int len)
 {
-       const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_OLD);
+       emit_line_checked(reset, ecbdata, line, len,
+                         DIFF_FILE_NEW, WSEH_NEW, '+');
+}
 
-       emit_line_0(ecbdata->opt, set, reset, '-', line, len);
+static void emit_del_line(const char *reset,
+                         struct emit_callback *ecbdata,
+                         const char *line, int len)
+{
+       emit_line_checked(reset, ecbdata, line, len,
+                         DIFF_FILE_OLD, WSEH_OLD, '-');
 }
 
 static void emit_context_line(const char *reset,
                              struct emit_callback *ecbdata,
                              const char *line, int len)
 {
-       const char *set = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
-
-       emit_line_0(ecbdata->opt, set, reset, ' ', line, len);
+       emit_line_checked(reset, ecbdata, line, len,
+                         DIFF_CONTEXT, WSEH_CONTEXT, ' ');
 }
 
 static void emit_hunk_header(struct emit_callback *ecbdata,
                             const char *line, int len)
 {
-       const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
+       const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT);
        const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO);
        const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO);
        const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
@@ -536,7 +551,7 @@ static void emit_hunk_header(struct emit_callback *ecbdata,
        if (len < 10 ||
            memcmp(line, atat, 2) ||
            !(ep = memmem(line + 2, len - 2, atat, 2))) {
-               emit_line(ecbdata->opt, plain, reset, line, len);
+               emit_line(ecbdata->opt, context, reset, line, len);
                return;
        }
        ep += 2; /* skip over @@ */
@@ -558,7 +573,7 @@ static void emit_hunk_header(struct emit_callback *ecbdata,
                if (*ep != ' ' && *ep != '\t')
                        break;
        if (ep != cp) {
-               strbuf_addstr(&msgbuf, plain);
+               strbuf_addstr(&msgbuf, context);
                strbuf_add(&msgbuf, cp, ep - cp);
                strbuf_addstr(&msgbuf, reset);
        }
@@ -639,10 +654,10 @@ static void emit_rewrite_lines(struct emit_callback *ecb,
                data += len;
        }
        if (!endp) {
-               const char *plain = diff_get_color(ecb->color_diff,
-                                                  DIFF_PLAIN);
+               const char *context = diff_get_color(ecb->color_diff,
+                                                    DIFF_CONTEXT);
                putc('\n', ecb->opt->file);
-               emit_line_0(ecb->opt, plain, reset, '\\',
+               emit_line_0(ecb->opt, context, reset, '\\',
                            nneof, strlen(nneof));
        }
 }
@@ -1102,7 +1117,7 @@ static void init_diff_words_data(struct emit_callback *ecbdata,
                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->ctx.color = diff_get_color_opt(o, DIFF_PLAIN);
+               st->ctx.color = diff_get_color_opt(o, DIFF_CONTEXT);
        }
 }
 
@@ -1178,7 +1193,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 {
        struct emit_callback *ecbdata = priv;
        const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
-       const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
+       const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT);
        const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
        struct diff_options *o = ecbdata->opt;
        const char *line_prefix = diff_line_prefix(o);
@@ -1249,7 +1264,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
                }
                diff_words_flush(ecbdata);
                if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) {
-                       emit_line(ecbdata->opt, plain, reset, line, len);
+                       emit_line(ecbdata->opt, context, reset, line, len);
                        fputs("~\n", ecbdata->opt->file);
                } else {
                        /*
@@ -1261,7 +1276,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
                              line++;
                              len--;
                        }
-                       emit_line(ecbdata->opt, plain, reset, line, len);
+                       emit_line(ecbdata->opt, context, reset, line, len);
                }
                return;
        }
@@ -1284,7 +1299,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
                /* incomplete line at the end */
                ecbdata->lno_in_preimage++;
                emit_line(ecbdata->opt,
-                         diff_get_color(ecbdata->color_diff, DIFF_PLAIN),
+                         diff_get_color(ecbdata->color_diff, DIFF_CONTEXT),
                          reset, line, len);
                break;
        }
@@ -2119,7 +2134,6 @@ static unsigned char *deflate_it(char *data,
        unsigned char *deflated;
        git_zstream stream;
 
-       memset(&stream, 0, sizeof(stream));
        git_deflate_init(&stream, zlib_compression_level);
        bound = git_deflate_bound(&stream, size);
        deflated = xmalloc(bound);
@@ -3250,6 +3264,7 @@ void diff_setup(struct diff_options *options)
        options->rename_limit = -1;
        options->dirstat_permille = diff_dirstat_permille_default;
        options->context = diff_context_default;
+       options->ws_error_highlight = WSEH_NEW;
        DIFF_OPT_SET(options, RENAME_EMPTY);
 
        /* pathchange left =NULL by default */
@@ -3636,6 +3651,40 @@ static void enable_patch_output(int *fmt) {
        *fmt |= DIFF_FORMAT_PATCH;
 }
 
+static int parse_one_token(const char **arg, const char *token)
+{
+       return skip_prefix(*arg, token, arg) && (!**arg || **arg == ',');
+}
+
+static int parse_ws_error_highlight(struct diff_options *opt, const char *arg)
+{
+       const char *orig_arg = arg;
+       unsigned val = 0;
+       while (*arg) {
+               if (parse_one_token(&arg, "none"))
+                       val = 0;
+               else if (parse_one_token(&arg, "default"))
+                       val = WSEH_NEW;
+               else if (parse_one_token(&arg, "all"))
+                       val = WSEH_NEW | WSEH_OLD | WSEH_CONTEXT;
+               else if (parse_one_token(&arg, "new"))
+                       val |= WSEH_NEW;
+               else if (parse_one_token(&arg, "old"))
+                       val |= WSEH_OLD;
+               else if (parse_one_token(&arg, "context"))
+                       val |= WSEH_CONTEXT;
+               else {
+                       error("unknown value after ws-error-highlight=%.*s",
+                             (int)(arg - orig_arg), orig_arg);
+                       return 0;
+               }
+               if (*arg)
+                       arg++;
+       }
+       opt->ws_error_highlight = val;
+       return 1;
+}
+
 int diff_opt_parse(struct diff_options *options, const char **av, int ac)
 {
        const char *arg = av[0];
@@ -3833,6 +3882,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
                DIFF_OPT_SET(options, SUBMODULE_LOG);
        else if (skip_prefix(arg, "--submodule=", &arg))
                return parse_submodule_opt(options, arg);
+       else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
+               return parse_ws_error_highlight(options, arg);
 
        /* misc options */
        else if (!strcmp(arg, "-z"))
@@ -4567,7 +4618,7 @@ void diff_flush(struct diff_options *options)
                        show_stats(&diffstat, options);
                if (output_format & DIFF_FORMAT_SHORTSTAT)
                        show_shortstats(&diffstat, options);
-               if (output_format & DIFF_FORMAT_DIRSTAT)
+               if (output_format & DIFF_FORMAT_DIRSTAT && dirstat_by_line)
                        show_dirstat_by_line(&diffstat, options);
                free_diffstat_info(&diffstat);
                separator++;