t4211: demonstrate empty -L range crash

diff --git a/builtin/log.c b/builtin/log.c
index 5a4055eb0b0d4965785b6f69dbe92efe251c54dd..d584ff1a39209a656581b347f645c93fbaf26996 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -19,9 +19,11 @@
 #include "remote.h"
 #include "string-list.h"
 #include "parse-options.h"
+#include "line-log.h"
 #include "branch.h"
 #include "streaming.h"
 #include "version.h"
+#include "mailmap.h"
 
 /* Set a default date-time format for git log ("log.date" config variable) */
 static const char *default_date_mode = NULL;
@@ -30,6 +32,7 @@ static int default_abbrev_commit;
 static int default_show_root = 1;
 static int decoration_style;
 static int decoration_given;
+static int use_mailmap_config;
 static const char *fmt_patch_subject_prefix = "PATCH";
 static const char *fmt_pretty;
 
@@ -39,6 +42,12 @@ static const char * const builtin_log_usage[] = {
        NULL
 };
 
+struct line_opt_callback_data {
+       struct rev_info *rev;
+       const char *prefix;
+       struct string_list args;
+};
+
 static int parse_decoration_style(const char *var, const char *value)
 {
        switch (git_config_maybe_bool(var, value)) {
@@ -73,6 +82,19 @@ static int decorate_callback(const struct option *opt, const char *arg, int unse
        return 0;
 }
 
+static int log_line_range_callback(const struct option *option, const char *arg, int unset)
+{
+       struct line_opt_callback_data *data = option->value;
+
+       if (!arg)
+               return -1;
+
+       data->rev->line_level_traverse = 1;
+       string_list_append(&data->args, arg);
+
+       return 0;
+}
+
 static void cmd_log_init_defaults(struct rev_info *rev)
 {
        if (fmt_pretty)
@@ -94,16 +116,25 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
                         struct rev_info *rev, struct setup_revision_opt *opt)
 {
        struct userformat_want w;
-       int quiet = 0, source = 0;
+       int quiet = 0, source = 0, mailmap = 0;
+       static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
 
        const struct option builtin_log_options[] = {
                OPT_BOOLEAN(0, "quiet", &quiet, N_("suppress diff output")),
                OPT_BOOLEAN(0, "source", &source, N_("show source")),
+               OPT_BOOLEAN(0, "use-mailmap", &mailmap, N_("Use mail map file")),
                { OPTION_CALLBACK, 0, "decorate", NULL, NULL, N_("decorate options"),
                  PARSE_OPT_OPTARG, decorate_callback},
+               OPT_CALLBACK('L', NULL, &line_cb, "n,m:file",
+                            "Process line range n,m in file, counting from 1",
+                            log_line_range_callback),
                OPT_END()
        };
 
+       line_cb.rev = rev;
+       line_cb.prefix = prefix;
+
+       mailmap = use_mailmap_config;
        argc = parse_options(argc, argv, prefix,
                             builtin_log_options, builtin_log_usage,
                             PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN |
@@ -136,6 +167,11 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
        if (source)
                rev->show_source = 1;
 
+       if (mailmap) {
+               rev->mailmap = xcalloc(1, sizeof(struct string_list));
+               read_mailmap(rev->mailmap, NULL);
+       }
+
        if (rev->pretty_given && rev->commit_format == CMIT_FMT_RAW) {
                /*
                 * "log --pretty=raw" is special; ignore UI oriented
@@ -151,6 +187,10 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
                rev->show_decorations = 1;
                load_ref_decorations(decoration_style);
        }
+
+       if (rev->line_level_traverse)
+               line_log_init(rev, line_cb.prefix, &line_cb.args);
+
        setup_pager();
 }
 
@@ -351,6 +391,11 @@ static int git_log_config(const char *var, const char *value, void *cb)
        }
        if (!prefixcmp(var, "color.decorate."))
                return parse_decorate_color_config(var, 15, value);
+       if (!strcmp(var, "log.mailmap")) {
+               use_mailmap_config = git_config_bool(var, value);
+               return 0;
+       }
+
        if (grep_config(var, value, cb) < 0)
                return -1;
        return git_diff_ui_config(var, value, cb);