diff options
| -rw-r--r-- | builtin/diff-tree.c | 12 | ||||
| -rw-r--r-- | builtin/log.c | 9 | ||||
| -rw-r--r-- | diff.c | 26 | ||||
| -rw-r--r-- | diff.h | 2 | ||||
| -rw-r--r-- | diffcore-rename.c | 38 | ||||
| -rw-r--r-- | merge-recursive.c | 10 | ||||
| -rwxr-xr-x | t/t4001-diff-rename.sh | 25 |
7 files changed, 112 insertions, 10 deletions
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c index 0d2a3e9fa2..be6417d166 100644 --- a/builtin/diff-tree.c +++ b/builtin/diff-tree.c @@ -163,6 +163,9 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix) } if (read_stdin) { + int saved_nrl = 0; + int saved_dcctc = 0; + if (opt->diffopt.detect_rename) opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE | DIFF_SETUP_USE_CACHE); @@ -173,9 +176,16 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix) fputs(line, stdout); fflush(stdout); } - else + else { diff_tree_stdin(line); + if (saved_nrl < opt->diffopt.needed_rename_limit) + saved_nrl = opt->diffopt.needed_rename_limit; + if (opt->diffopt.degraded_cc_to_c) + saved_dcctc = 1; + } } + opt->diffopt.degraded_cc_to_c = saved_dcctc; + opt->diffopt.needed_rename_limit = saved_nrl; } return diff_result_code(&opt->diffopt, 0); diff --git a/builtin/log.c b/builtin/log.c index 796e9e5746..707fd5706c 100644 --- a/builtin/log.c +++ b/builtin/log.c @@ -247,6 +247,8 @@ static void finish_early_output(struct rev_info *rev) static int cmd_log_walk(struct rev_info *rev) { struct commit *commit; + int saved_nrl = 0; + int saved_dcctc = 0; if (rev->early_output) setup_early_output(rev); @@ -277,7 +279,14 @@ static int cmd_log_walk(struct rev_info *rev) } free_commit_list(commit->parents); commit->parents = NULL; + if (saved_nrl < rev->diffopt.needed_rename_limit) + saved_nrl = rev->diffopt.needed_rename_limit; + if (rev->diffopt.degraded_cc_to_c) + saved_dcctc = 1; } + rev->diffopt.degraded_cc_to_c = saved_dcctc; + rev->diffopt.needed_rename_limit = saved_nrl; + if (rev->diffopt.output_format & DIFF_FORMAT_CHECKDIFF && DIFF_OPT_TST(&rev->diffopt, CHECK_FAILED)) { return 02; @@ -3956,6 +3956,28 @@ static int is_summary_empty(const struct diff_queue_struct *q) return 1; } +static const char rename_limit_warning[] = +"inexact rename detection was skipped due to too many files."; + +static const char degrade_cc_to_c_warning[] = +"only found copies from modified paths due to too many files."; + +static const char rename_limit_advice[] = +"you may want to set your %s variable to at least " +"%d and retry the command."; + +void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) +{ + if (degraded_cc) + warning(degrade_cc_to_c_warning); + else if (needed) + warning(rename_limit_warning); + else + return; + if (0 < needed && needed < 32767) + warning(rename_limit_advice, varname, needed); +} + void diff_flush(struct diff_options *options) { struct diff_queue_struct *q = &diff_queued_diff; @@ -4237,6 +4259,10 @@ void diffcore_std(struct diff_options *options) int diff_result_code(struct diff_options *opt, int status) { int result = 0; + + diff_warn_rename_limit("diff.renamelimit", + opt->needed_rename_limit, + opt->degraded_cc_to_c); if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) return status; @@ -111,6 +111,7 @@ struct diff_options { int rename_score; int rename_limit; int needed_rename_limit; + int degraded_cc_to_c; int show_rename_progress; int dirstat_percent; int setup; @@ -273,6 +274,7 @@ extern void diffcore_fix_diff_index(struct diff_options *); extern int diff_queue_is_empty(void); extern void diff_flush(struct diff_options*); +extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc); /* diff-raw status letters */ #define DIFF_STATUS_ADDED 'A' diff --git a/diffcore-rename.c b/diffcore-rename.c index a932f762d2..f62587e523 100644 --- a/diffcore-rename.c +++ b/diffcore-rename.c @@ -420,11 +420,18 @@ static void record_if_better(struct diff_score m[], struct diff_score *o) m[worst] = *o; } +/* + * Returns: + * 0 if we are under the limit; + * 1 if we need to disable inexact rename detection; + * 2 if we would be under the limit if we were given -C instead of -C -C. + */ static int too_many_rename_candidates(int num_create, struct diff_options *options) { int rename_limit = options->rename_limit; int num_src = rename_src_nr; + int i; options->needed_rename_limit = 0; @@ -445,6 +452,20 @@ static int too_many_rename_candidates(int num_create, options->needed_rename_limit = num_src > num_create ? num_src : num_create; + + /* Are we running under -C -C? */ + if (!DIFF_OPT_TST(options, FIND_COPIES_HARDER)) + return 1; + + /* Would we bust the limit if we were running under -C? */ + for (num_src = i = 0; i < rename_src_nr; i++) { + if (diff_unmodified_pair(rename_src[i].p)) + continue; + num_src++; + } + if ((num_create <= rename_limit || num_src <= rename_limit) && + (num_create * num_src <= rename_limit * rename_limit)) + return 2; return 1; } @@ -476,7 +497,7 @@ void diffcore_rename(struct diff_options *options) struct diff_queue_struct *q = &diff_queued_diff; struct diff_queue_struct outq; struct diff_score *mx; - int i, j, rename_count; + int i, j, rename_count, skip_unmodified = 0; int num_create, num_src, dst_cnt; struct progress *progress = NULL; @@ -539,8 +560,16 @@ void diffcore_rename(struct diff_options *options) if (!num_create) goto cleanup; - if (too_many_rename_candidates(num_create, options)) + switch (too_many_rename_candidates(num_create, options)) { + case 1: goto cleanup; + case 2: + options->degraded_cc_to_c = 1; + skip_unmodified = 1; + break; + default: + break; + } if (options->show_rename_progress) { progress = start_progress_delay( @@ -563,6 +592,11 @@ void diffcore_rename(struct diff_options *options) for (j = 0; j < rename_src_nr; j++) { struct diff_filespec *one = rename_src[j].p->one; struct diff_score this_src; + + if (skip_unmodified && + diff_unmodified_pair(rename_src[j].p)) + continue; + this_src.score = estimate_similarity(one, two, minimum_score); this_src.name_score = basename_same(one, two); diff --git a/merge-recursive.c b/merge-recursive.c index 8e82a8b1a5..3ae4d53cc5 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -22,11 +22,6 @@ #include "dir.h" #include "submodule.h" -static const char rename_limit_advice[] = -"inexact rename detection was skipped because there were too many\n" -" files. You may want to set your merge.renamelimit variable to at least\n" -" %d and retry this merge."; - static struct tree *shift_tree_object(struct tree *one, struct tree *two, const char *subtree_shift) { @@ -1656,8 +1651,9 @@ int merge_recursive(struct merge_options *o, commit_list_insert(h2, &(*result)->parents->next); } flush_output(o); - if (o->needed_rename_limit) - warning(rename_limit_advice, o->needed_rename_limit); + if (show(o, 2)) + diff_warn_rename_limit("merge.renamelimit", + o->needed_rename_limit, 0); return clean; } diff --git a/t/t4001-diff-rename.sh b/t/t4001-diff-rename.sh index 71bac83dd5..301f3a0e54 100755 --- a/t/t4001-diff-rename.sh +++ b/t/t4001-diff-rename.sh @@ -77,4 +77,29 @@ test_expect_success 'favour same basenames even with minor differences' ' git show HEAD:path1 | sed "s/15/16/" > subdir/path1 && git status | grep "renamed: .*path1 -> subdir/path1"' +test_expect_success 'setup for many rename source candidates' ' + git reset --hard && + for i in 0 1 2 3 4 5 6 7 8 9; + do + for j in 0 1 2 3 4 5 6 7 8 9; + do + echo "$i$j" >"path$i$j" + done + done && + git add "path??" && + test_tick && + git commit -m "hundred" && + (cat path1; echo new) >new-path && + echo old >>path1 && + git add new-path path1 && + git diff -l 4 -C -C --cached --name-status >actual 2>actual.err && + sed -e "s/^\([CM]\)[0-9]* /\1 /" actual >actual.munged && + cat >expect <<-EOF && + C path1 new-path + M path1 + EOF + test_cmp expect actual.munged && + grep warning actual.err +' + test_done |