From 0940e5f211452ec2520d1b04233acddf0a872c06 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 18 Feb 2011 20:10:32 -0800 Subject: [PATCH] diffcore-rename: properly honor the difference between -M and -C We would allow rename detection to do copy detection even when asked purely for renames. That confuses users, but more importantly it can terminally confuse the recursive merge rename logic. Signed-off-by: Linus Torvalds Signed-off-by: Junio C Hamano --- diffcore-rename.c | 53 +++++++++++++++++----------------- t/t4003-diff-rename-1.sh | 2 +- t/t4004-diff-rename-symlink.sh | 2 +- t/t4005-diff-rename-2.sh | 2 +- t/t4008-diff-break-rewrite.sh | 4 +-- t/t4009-diff-rename-4.sh | 2 +- 6 files changed, 32 insertions(+), 33 deletions(-) diff --git a/diffcore-rename.c b/diffcore-rename.c index e5e88feb54..b9b039d4a3 100644 --- a/diffcore-rename.c +++ b/diffcore-rename.c @@ -278,6 +278,8 @@ static int find_identical_files(struct file_similarity *src, } /* Give higher scores to sources that haven't been used already */ score = !source->rename_used; + if (source->rename_used && options->detect_rename != DIFF_DETECT_COPY) + continue; score += basename_same(source, target); if (score > best_score) { best = p; @@ -416,6 +418,27 @@ static void record_if_better(struct diff_score m[], struct diff_score *o) m[worst] = *o; } +static int find_renames(struct diff_score *mx, int dst_cnt, int minimum_score, int copies) +{ + int count = 0, i; + + for (i = 0; i < dst_cnt * NUM_CANDIDATE_PER_DST; i++) { + struct diff_rename_dst *dst; + + if ((mx[i].dst < 0) || + (mx[i].score < minimum_score)) + break; /* there is no more usable pair. */ + dst = &rename_dst[mx[i].dst]; + if (dst->pair) + continue; /* already done, either exact or fuzzy. */ + if (!copies && rename_src[mx[i].src].one->rename_used) + continue; + record_rename_pair(mx[i].dst, mx[i].src, mx[i].score); + count++; + } + return count; +} + void diffcore_rename(struct diff_options *options) { int detect_rename = options->detect_rename; @@ -538,33 +561,9 @@ void diffcore_rename(struct diff_options *options) /* cost matrix sorted by most to least similar pair */ qsort(mx, dst_cnt * NUM_CANDIDATE_PER_DST, sizeof(*mx), score_compare); - for (i = 0; i < dst_cnt * NUM_CANDIDATE_PER_DST; i++) { - struct diff_rename_dst *dst; - - if ((mx[i].dst < 0) || - (mx[i].score < minimum_score)) - break; /* there is no more usable pair. */ - dst = &rename_dst[mx[i].dst]; - if (dst->pair) - continue; /* already done, either exact or fuzzy. */ - if (rename_src[mx[i].src].one->rename_used) - continue; - record_rename_pair(mx[i].dst, mx[i].src, mx[i].score); - rename_count++; - } - - for (i = 0; i < dst_cnt * NUM_CANDIDATE_PER_DST; i++) { - struct diff_rename_dst *dst; - - if ((mx[i].dst < 0) || - (mx[i].score < minimum_score)) - break; /* there is no more usable pair. */ - dst = &rename_dst[mx[i].dst]; - if (dst->pair) - continue; /* already done, either exact or fuzzy. */ - record_rename_pair(mx[i].dst, mx[i].src, mx[i].score); - rename_count++; - } + rename_count += find_renames(mx, dst_cnt, minimum_score, 0); + if (detect_rename == DIFF_DETECT_COPY) + rename_count += find_renames(mx, dst_cnt, minimum_score, 1); free(mx); cleanup: diff --git a/t/t4003-diff-rename-1.sh b/t/t4003-diff-rename-1.sh index c6130c4019..bfa8835638 100755 --- a/t/t4003-diff-rename-1.sh +++ b/t/t4003-diff-rename-1.sh @@ -29,7 +29,7 @@ test_expect_success \ # copy-and-edit one, and rename-and-edit the other. We do not say # anything about rezrov. -GIT_DIFF_OPTS=--unified=0 git diff-index -M -p $tree >current +GIT_DIFF_OPTS=--unified=0 git diff-index -C -p $tree >current cat >expected <<\EOF diff --git a/COPYING b/COPYING.1 copy from COPYING diff --git a/t/t4004-diff-rename-symlink.sh b/t/t4004-diff-rename-symlink.sh index 92a65f4852..6e562c80d1 100755 --- a/t/t4004-diff-rename-symlink.sh +++ b/t/t4004-diff-rename-symlink.sh @@ -35,7 +35,7 @@ test_expect_success SYMLINKS \ # a new creation. test_expect_success SYMLINKS 'setup diff output' " - GIT_DIFF_OPTS=--unified=0 git diff-index -M -p $tree >current && + GIT_DIFF_OPTS=--unified=0 git diff-index -C -p $tree >current && cat >expected <<\EOF diff --git a/bozbar b/bozbar new file mode 120000 diff --git a/t/t4005-diff-rename-2.sh b/t/t4005-diff-rename-2.sh index 1ba359d478..77d7f4946f 100755 --- a/t/t4005-diff-rename-2.sh +++ b/t/t4005-diff-rename-2.sh @@ -29,7 +29,7 @@ test_expect_success \ # and COPYING.2 are based on COPYING, and do not say anything about # rezrov. -git diff-index -M $tree >current +git diff-index -C $tree >current cat >expected <<\EOF :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234 COPYING COPYING.1 diff --git a/t/t4008-diff-break-rewrite.sh b/t/t4008-diff-break-rewrite.sh index d79d9e1e71..73b4a24f5e 100755 --- a/t/t4008-diff-break-rewrite.sh +++ b/t/t4008-diff-break-rewrite.sh @@ -173,8 +173,8 @@ test_expect_success \ 'compare_diff_raw expected current' test_expect_success \ - 'run diff with -B -M' \ - 'git diff-index -B -M "$tree" >current' + 'run diff with -B -C' \ + 'git diff-index -B -C "$tree" >current' cat >expected <<\EOF :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c C095 file0 file1 diff --git a/t/t4009-diff-rename-4.sh b/t/t4009-diff-rename-4.sh index de3f17478e..f22c8e3dba 100755 --- a/t/t4009-diff-rename-4.sh +++ b/t/t4009-diff-rename-4.sh @@ -29,7 +29,7 @@ test_expect_success \ # and COPYING.2 are based on COPYING, and do not say anything about # rezrov. -git diff-index -z -M $tree >current +git diff-index -z -C $tree >current cat >expected <<\EOF :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234 -- 2.47.1