fetch: add test to make sure we stay backwards compatible
[gitweb.git] / diff.c
diff --git a/diff.c b/diff.c
index 0c604726c06b07c2cd17bbdf05dc669ae92e5ae4..69f03570adf6cf2c3642aea1fb0dba5011ef966f 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -21,6 +21,7 @@
 #include "string-list.h"
 #include "argv-array.h"
 #include "graph.h"
+#include "packfile.h"
 
 #ifdef NO_FAST_WORKING_DIRECTORY
 #define FAST_WORKING_DIRECTORY 0
@@ -357,9 +358,6 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
                return 0;
        }
 
-       if (git_color_config(var, value, cb) < 0)
-               return -1;
-
        return git_diff_basic_config(var, value, cb);
 }
 
@@ -404,9 +402,6 @@ int git_diff_basic_config(const char *var, const char *value, void *cb)
                return 0;
        }
 
-       if (starts_with(var, "submodule."))
-               return parse_submodule_config_option(var, value);
-
        if (git_diff_heuristic_config(var, value, cb) < 0)
                return -1;
 
@@ -464,11 +459,9 @@ static struct diff_tempfile {
         * If this diff_tempfile instance refers to a temporary file,
         * this tempfile object is used to manage its lifetime.
         */
-       struct tempfile tempfile;
+       struct tempfile *tempfile;
 } diff_temp[2];
 
-typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len);
-
 struct emit_callback {
        int color_diff;
        unsigned ws_rule;
@@ -476,7 +469,6 @@ struct emit_callback {
        int blank_at_eof_in_postimage;
        int lno_in_preimage;
        int lno_in_postimage;
-       sane_truncate_fn truncate;
        const char **label_path;
        struct diff_words_data *diff_words;
        struct diff_options *opt;
@@ -861,6 +853,38 @@ static int shrink_potential_moved_blocks(struct moved_entry **pmb,
        return rp + 1;
 }
 
+/*
+ * If o->color_moved is COLOR_MOVED_PLAIN, this function does nothing.
+ *
+ * Otherwise, if the last block has fewer alphanumeric characters than
+ * COLOR_MOVED_MIN_ALNUM_COUNT, unset DIFF_SYMBOL_MOVED_LINE on all lines in
+ * that block.
+ *
+ * The last block consists of the (n - block_length)'th line up to but not
+ * including the nth line.
+ *
+ * NEEDSWORK: This uses the same heuristic as blame_entry_score() in blame.c.
+ * Think of a way to unify them.
+ */
+static void adjust_last_block(struct diff_options *o, int n, int block_length)
+{
+       int i, alnum_count = 0;
+       if (o->color_moved == COLOR_MOVED_PLAIN)
+               return;
+       for (i = 1; i < block_length + 1; i++) {
+               const char *c = o->emitted_symbols->buf[n - i].line;
+               for (; *c; c++) {
+                       if (!isalnum(*c))
+                               continue;
+                       alnum_count++;
+                       if (alnum_count >= COLOR_MOVED_MIN_ALNUM_COUNT)
+                               return;
+               }
+       }
+       for (i = 1; i < block_length + 1; i++)
+               o->emitted_symbols->buf[n - i].flags &= ~DIFF_SYMBOL_MOVED_LINE;
+}
+
 /* Find blocks of moved code, delegate actual coloring decision to helper */
 static void mark_color_as_moved(struct diff_options *o,
                                struct hashmap *add_lines,
@@ -896,20 +920,13 @@ static void mark_color_as_moved(struct diff_options *o,
                }
 
                if (!match) {
-                       if (block_length < COLOR_MOVED_MIN_BLOCK_LENGTH &&
-                           o->color_moved != COLOR_MOVED_PLAIN) {
-                               for (i = 0; i < block_length + 1; i++) {
-                                       l = &o->emitted_symbols->buf[n - i];
-                                       l->flags &= ~DIFF_SYMBOL_MOVED_LINE;
-                               }
-                       }
+                       adjust_last_block(o, n, block_length);
                        pmb_nr = 0;
                        block_length = 0;
                        continue;
                }
 
                l->flags |= DIFF_SYMBOL_MOVED_LINE;
-               block_length++;
 
                if (o->color_moved == COLOR_MOVED_PLAIN)
                        continue;
@@ -939,11 +956,17 @@ static void mark_color_as_moved(struct diff_options *o,
                        }
 
                        flipped_block = (flipped_block + 1) % 2;
+
+                       adjust_last_block(o, n, block_length);
+                       block_length = 0;
                }
 
+               block_length++;
+
                if (flipped_block)
                        l->flags |= DIFF_SYMBOL_MOVED_LINE_ALT;
        }
+       adjust_last_block(o, n, block_length);
 
        free(pmb);
 }
@@ -1391,7 +1414,7 @@ static void remove_tempfile(void)
 {
        int i;
        for (i = 0; i < ARRAY_SIZE(diff_temp); i++) {
-               if (is_tempfile_active(&diff_temp[i].tempfile))
+               if (is_tempfile_active(diff_temp[i].tempfile))
                        delete_tempfile(&diff_temp[i].tempfile);
                diff_temp[i].name = NULL;
        }
@@ -1518,7 +1541,7 @@ static void emit_rewrite_diff(const char *name_a,
 
 struct diff_words_buffer {
        mmfile_t text;
-       long alloc;
+       unsigned long alloc;
        struct diff_words_orig {
                const char *begin, *end;
        } *orig;
@@ -1971,8 +1994,6 @@ static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, u
        unsigned long allot;
        size_t l = len;
 
-       if (ecb->truncate)
-               return ecb->truncate(line, len);
        cp = line;
        allot = l;
        while (0 < l) {
@@ -2562,6 +2583,7 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
        }
 
        print_stat_summary_inserts_deletes(options, total_files, adds, dels);
+       strbuf_release(&out);
 }
 
 static void show_shortstats(struct diffstat_t *data, struct diff_options *options)
@@ -2817,7 +2839,7 @@ static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *o
                         * bytes per "line".
                         * This is stupid and ugly, but very cheap...
                         */
-                       damage = (damage + 63) / 64;
+                       damage = DIV_ROUND_UP(damage, 64);
                ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc);
                dir.files[dir.nr].name = file->name;
                dir.files[dir.nr].changed = damage;
@@ -3699,7 +3721,6 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
                           const struct object_id *oid,
                           int mode)
 {
-       int fd;
        struct strbuf buf = STRBUF_INIT;
        struct strbuf template = STRBUF_INIT;
        char *path_dup = xstrdup(path);
@@ -3709,18 +3730,18 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
        strbuf_addstr(&template, "XXXXXX_");
        strbuf_addstr(&template, base);
 
-       fd = mks_tempfile_ts(&temp->tempfile, template.buf, strlen(base) + 1);
-       if (fd < 0)
+       temp->tempfile = mks_tempfile_ts(template.buf, strlen(base) + 1);
+       if (!temp->tempfile)
                die_errno("unable to create temp-file");
        if (convert_to_working_tree(path,
                        (const char *)blob, (size_t)size, &buf)) {
                blob = buf.buf;
                size = buf.len;
        }
-       if (write_in_full(fd, blob, size) != size)
+       if (write_in_full(temp->tempfile->fd, blob, size) < 0 ||
+           close_tempfile_gently(temp->tempfile))
                die_errno("unable to write temp-file");
-       close_tempfile(&temp->tempfile);
-       temp->name = get_tempfile_path(&temp->tempfile);
+       temp->name = get_tempfile_path(temp->tempfile);
        oid_to_hex_r(temp->hex, oid);
        xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode);
        strbuf_release(&buf);
@@ -3988,7 +4009,7 @@ static void diff_fill_oid_info(struct diff_filespec *one)
                        }
                        if (lstat(one->path, &st) < 0)
                                die_errno("stat '%s'", one->path);
-                       if (index_path(one->oid.hash, one->path, &st, 0))
+                       if (index_path(&one->oid, one->path, &st, 0))
                                die("cannot hash %s", one->path);
                }
        }
@@ -5269,6 +5290,7 @@ static void show_rename_copy(struct diff_options *opt, const char *renamecopy,
        emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
                                 sb.buf, sb.len, 0);
        show_mode_change(opt, p, 0);
+       strbuf_release(&sb);
 }
 
 static void diff_summary(struct diff_options *opt, struct diff_filepair *p)
@@ -5294,6 +5316,7 @@ static void diff_summary(struct diff_options *opt, struct diff_filepair *p)
                        strbuf_addf(&sb, " (%d%%)\n", similarity_index(p));
                        emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
                                         sb.buf, sb.len, 0);
+                       strbuf_release(&sb);
                }
                show_mode_change(opt, p, !p->score);
                break;