git-p4: add Git LFS backend for large file system

diff --git a/trailer.c b/trailer.c
index f7d271397fea3bf02d795fddcf4472ef2bd9f395..6f3416febaba90f281e95ea605ac6aec10853ef3 100644 (file)
--- a/trailer.c
+++ b/trailer.c
@@ -1,7 +1,7 @@
 #include "cache.h"
 #include "string-list.h"
 #include "run-command.h"
-#include "string-list.h"
+#include "commit.h"
 #include "trailer.h"
 /*
  * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
@@ -214,16 +214,6 @@ static struct trailer_item *remove_first(struct trailer_item **first)
        return item;
 }
 
-static int read_from_command(struct child_process *cp, struct strbuf *buf)
-{
-       if (run_command(cp))
-               return error("running trailer command '%s' failed", cp->argv[0]);
-       if (strbuf_read(buf, cp->out, 1024) < 1)
-               return error("reading from trailer command '%s' failed", cp->argv[0]);
-       strbuf_trim(buf);
-       return 0;
-}
-
 static const char *apply_command(const char *command, const char *arg)
 {
        struct strbuf cmd = STRBUF_INIT;
@@ -240,14 +230,16 @@ static const char *apply_command(const char *command, const char *arg)
        cp.argv = argv;
        cp.env = local_repo_env;
        cp.no_stdin = 1;
-       cp.out = -1;
        cp.use_shell = 1;
 
-       if (read_from_command(&cp, &buf)) {
+       if (capture_command(&cp, &buf, 1024)) {
+               error("running trailer command '%s' failed", cmd.buf);
                strbuf_release(&buf);
                result = xstrdup("");
-       } else
+       } else {
+               strbuf_trim(&buf);
                result = strbuf_detach(&buf, NULL);
+       }
 
        strbuf_release(&cmd);
        return result;
@@ -743,14 +735,22 @@ static int find_patch_start(struct strbuf **lines, int count)
  */
 static int find_trailer_start(struct strbuf **lines, int count)
 {
-       int start, only_spaces = 1;
+       int start, end_of_title, only_spaces = 1;
+
+       /* The first paragraph is the title and cannot be trailers */
+       for (start = 0; start < count; start++) {
+               if (lines[start]->buf[0] == comment_line_char)
+                       continue;
+               if (contains_only_spaces(lines[start]->buf))
+                       break;
+       }
+       end_of_title = start;
 
        /*
         * Get the start of the trailers by looking starting from the end
         * for a line with only spaces before lines with one separator.
-        * The start cannot be the first line.
         */
-       for (start = count - 1; start >= 1; start--) {
+       for (start = count - 1; start >= end_of_title; start--) {
                if (lines[start]->buf[0] == comment_line_char)
                        continue;
                if (contains_only_spaces(lines[start]->buf)) {
@@ -769,6 +769,22 @@ static int find_trailer_start(struct strbuf **lines, int count)
        return only_spaces ? count : 0;
 }
 
+/* Get the index of the end of the trailers */
+static int find_trailer_end(struct strbuf **lines, int patch_start)
+{
+       struct strbuf sb = STRBUF_INIT;
+       int i, ignore_bytes;
+
+       for (i = 0; i < patch_start; i++)
+               strbuf_addbuf(&sb, lines[i]);
+       ignore_bytes = ignore_non_trailer(&sb);
+       strbuf_release(&sb);
+       for (i = patch_start - 1; i >= 0 && ignore_bytes > 0; i--)
+               ignore_bytes -= lines[i]->len;
+
+       return i + 1;
+}
+
 static int has_blank_line_before(struct strbuf **lines, int start)
 {
        for (;start >= 0; start--) {
@@ -791,14 +807,15 @@ static int process_input_file(struct strbuf **lines,
                              struct trailer_item **in_tok_last)
 {
        int count = 0;
-       int patch_start, trailer_start, i;
+       int patch_start, trailer_start, trailer_end, i;
 
        /* Get the line count */
        while (lines[count])
                count++;
 
        patch_start = find_patch_start(lines, count);
-       trailer_start = find_trailer_start(lines, patch_start);
+       trailer_end = find_trailer_end(lines, patch_start);
+       trailer_start = find_trailer_start(lines, trailer_end);
 
        /* Print lines before the trailers as is */
        print_lines(lines, 0, trailer_start);
@@ -807,14 +824,14 @@ static int process_input_file(struct strbuf **lines,
                printf("\n");
 
        /* Parse trailer lines */
-       for (i = trailer_start; i < patch_start; i++) {
+       for (i = trailer_start; i < trailer_end; i++) {
                if (lines[i]->buf[0] != comment_line_char) {
                        struct trailer_item *new = create_trailer_item(lines[i]->buf);
                        add_trailer_item(in_tok_first, in_tok_last, new);
                }
        }
 
-       return patch_start;
+       return trailer_end;
 }
 
 static void free_all(struct trailer_item **first)
@@ -831,7 +848,7 @@ void process_trailers(const char *file, int trim_empty, struct string_list *trai
        struct trailer_item *in_tok_last = NULL;
        struct trailer_item *arg_tok_first;
        struct strbuf **lines;
-       int patch_start;
+       int trailer_end;
 
        /* Default config must be setup first */
        git_config(git_trailer_default_config, NULL);
@@ -840,7 +857,7 @@ void process_trailers(const char *file, int trim_empty, struct string_list *trai
        lines = read_input_file(file);
 
        /* Print the lines before the trailers */
-       patch_start = process_input_file(lines, &in_tok_first, &in_tok_last);
+       trailer_end = process_input_file(lines, &in_tok_first, &in_tok_last);
 
        arg_tok_first = process_command_line_args(trailers);
 
@@ -851,7 +868,7 @@ void process_trailers(const char *file, int trim_empty, struct string_list *trai
        free_all(&in_tok_first);
 
        /* Print the lines after the trailers as is */
-       print_lines(lines, patch_start, INT_MAX);
+       print_lines(lines, trailer_end, INT_MAX);
 
        strbuf_list_free(lines);
 }