Implement line-history search (git log -L)

[thirdparty/git.git] / builtin / log.c

diff --git a/builtin/log.c b/builtin/log.c
index 8f0b2e84fef5d1b9c07ea8846c9fbc1318d8d51b..d584ff1a39209a656581b347f645c93fbaf26996 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -19,6 +19,7 @@
 #include "remote.h"
 #include "string-list.h"
 #include "parse-options.h"
+#include "line-log.h"
 #include "branch.h"
 #include "streaming.h"
 #include "version.h"
@@ -41,6 +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)) {
@@ -75,6 +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)
@@ -97,6 +117,7 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 {
        struct userformat_want w;
        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")),
@@ -104,9 +125,15 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
                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,
@@ -160,6 +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();
 }