diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 96 |
1 files changed, 95 insertions, 1 deletions
@@ -1101,22 +1101,26 @@ static void emit_binary_diff(mmfile_t *one, mmfile_t *two) static void setup_diff_attr_check(struct git_attr_check *check) { static struct git_attr *attr_diff; + static struct git_attr *attr_diff_func_name; if (!attr_diff) { attr_diff = git_attr("diff", 4); + attr_diff_func_name = git_attr("funcname", 8); } check[0].attr = attr_diff; + check[1].attr = attr_diff_func_name; } static void diff_filespec_check_attr(struct diff_filespec *one) { - struct git_attr_check attr_diff_check[1]; + struct git_attr_check attr_diff_check[2]; if (one->checked_attr) return; setup_diff_attr_check(attr_diff_check); one->is_binary = 0; + one->hunk_header_ident = NULL; if (!git_checkattr(one->path, ARRAY_SIZE(attr_diff_check), attr_diff_check)) { const char *value; @@ -1127,6 +1131,13 @@ static void diff_filespec_check_attr(struct diff_filespec *one) ; else if (ATTR_FALSE(value)) one->is_binary = 1; + + /* hunk header ident */ + value = attr_diff_check[1].value; + if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) + ; + else + one->hunk_header_ident = value; } if (!one->data && DIFF_FILE_VALID(one)) @@ -1143,6 +1154,82 @@ int diff_filespec_is_binary(struct diff_filespec *one) return one->is_binary; } +static struct hunk_header_regexp { + char *name; + char *regexp; + struct hunk_header_regexp *next; +} *hunk_header_regexp_list, **hunk_header_regexp_tail; + +static int hunk_header_config(const char *var, const char *value) +{ + static const char funcname[] = "funcname."; + struct hunk_header_regexp *hh; + + if (prefixcmp(var, funcname)) + return 0; + var += strlen(funcname); + for (hh = hunk_header_regexp_list; hh; hh = hh->next) + if (!strcmp(var, hh->name)) { + free(hh->regexp); + hh->regexp = xstrdup(value); + return 0; + } + hh = xcalloc(1, sizeof(*hh)); + hh->name = xstrdup(var); + hh->regexp = xstrdup(value); + hh->next = NULL; + *hunk_header_regexp_tail = hh; + return 0; +} + +static const char *hunk_header_regexp(const char *ident) +{ + struct hunk_header_regexp *hh; + + if (!hunk_header_regexp_tail) { + hunk_header_regexp_tail = &hunk_header_regexp_list; + git_config(hunk_header_config); + } + for (hh = hunk_header_regexp_list; hh; hh = hh->next) + if (!strcmp(ident, hh->name)) + return hh->regexp; + return NULL; +} + +static const char *diff_hunk_header_regexp(struct diff_filespec *one) +{ + const char *ident, *regexp; + + diff_filespec_check_attr(one); + ident = one->hunk_header_ident; + + if (!ident) + /* + * If the config file has "funcname.default" defined, that + * regexp is used; otherwise NULL is returned and xemit uses + * the built-in default. + */ + return hunk_header_regexp("default"); + + /* Look up custom "funcname.$ident" regexp from config. */ + regexp = hunk_header_regexp(ident); + if (regexp) + return regexp; + + /* + * And define built-in fallback patterns here. Note that + * these can be overriden by the user's config settings. + */ + if (!strcmp(ident, "java")) + return "!^[ ]*\\(catch\\|do\\|for\\|if\\|instanceof\\|" + "new\\|return\\|switch\\|throw\\|while\\)\n" + "^[ ]*\\(\\([ ]*" + "[A-Za-z_][A-Za-z_0-9]*\\)\\{2,\\}" + "[ ]*([^;]*$\\)"; + + return NULL; +} + static void builtin_diff(const char *name_a, const char *name_b, struct diff_filespec *one, @@ -1217,6 +1304,11 @@ static void builtin_diff(const char *name_a, xdemitconf_t xecfg; xdemitcb_t ecb; struct emit_callback ecbdata; + const char *hunk_header_regexp; + + hunk_header_regexp = diff_hunk_header_regexp(one); + if (!hunk_header_regexp) + hunk_header_regexp = diff_hunk_header_regexp(two); memset(&xecfg, 0, sizeof(xecfg)); memset(&ecbdata, 0, sizeof(ecbdata)); @@ -1226,6 +1318,8 @@ static void builtin_diff(const char *name_a, xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; xecfg.ctxlen = o->context; xecfg.flags = XDL_EMIT_FUNCNAMES; + if (hunk_header_regexp) + xdiff_set_find_func(&xecfg, hunk_header_regexp); if (!diffopts) ; else if (!prefixcmp(diffopts, "--unified=")) |