diff: activate diff.renames by default

diff --git a/trailer.c b/trailer.c
index 176fac2134503c3bc80994d4466d3c320c2f9404..94b387b499714911c9dfb6dd0940cb3f25a2397e 100644 (file)
--- a/trailer.c
+++ b/trailer.c
@@ -2,6 +2,7 @@
 #include "string-list.h"
 #include "run-command.h"
 #include "commit.h"
+#include "tempfile.h"
 #include "trailer.h"
 /*
  * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
@@ -843,7 +844,38 @@ static void free_all(struct trailer_item **first)
        }
 }
 
-void process_trailers(const char *file, int trim_empty, struct string_list *trailers)
+static struct tempfile trailers_tempfile;
+
+static FILE *create_in_place_tempfile(const char *file)
+{
+       struct stat st;
+       struct strbuf template = STRBUF_INIT;
+       const char *tail;
+       FILE *outfile;
+
+       if (stat(file, &st))
+               die_errno(_("could not stat %s"), file);
+       if (!S_ISREG(st.st_mode))
+               die(_("file %s is not a regular file"), file);
+       if (!(st.st_mode & S_IWUSR))
+               die(_("file %s is not writable by user"), file);
+
+       /* Create temporary file in the same directory as the original */
+       tail = strrchr(file, '/');
+       if (tail != NULL)
+               strbuf_add(&template, file, tail - file + 1);
+       strbuf_addstr(&template, "git-interpret-trailers-XXXXXX");
+
+       xmks_tempfile_m(&trailers_tempfile, template.buf, st.st_mode);
+       strbuf_release(&template);
+       outfile = fdopen_tempfile(&trailers_tempfile, "w");
+       if (!outfile)
+               die_errno(_("could not open temporary file"));
+
+       return outfile;
+}
+
+void process_trailers(const char *file, int in_place, int trim_empty, struct string_list *trailers)
 {
        struct trailer_item *in_tok_first = NULL;
        struct trailer_item *in_tok_last = NULL;
@@ -858,6 +890,9 @@ void process_trailers(const char *file, int trim_empty, struct string_list *trai
 
        lines = read_input_file(file);
 
+       if (in_place)
+               outfile = create_in_place_tempfile(file);
+
        /* Print the lines before the trailers */
        trailer_end = process_input_file(outfile, lines, &in_tok_first, &in_tok_last);
 
@@ -872,5 +907,9 @@ void process_trailers(const char *file, int trim_empty, struct string_list *trai
        /* Print the lines after the trailers as is */
        print_lines(outfile, lines, trailer_end, INT_MAX);
 
+       if (in_place)
+               if (rename_tempfile(&trailers_tempfile, file))
+                       die_errno(_("could not rename temporary file to %s"), file);
+
        strbuf_list_free(lines);
 }