From 296c6bb21a6980f6e5b42f0790d6365c1e3f696f Mon Sep 17 00:00:00 2001 From: Christian Couder Date: Wed, 26 May 2010 04:50:12 +0200 Subject: [PATCH] diff: fix "git show -C -C" output when renaming a binary file A bug was introduced in 3e97c7c6af2901cec63bf35fcd43ae3472e24af8 (No diff -b/-w output for all-whitespace changes, Nov 19 2009) that made the lines: diff --git a/bar b/sub/bar similarity index 100% rename from bar rename to sub/bar disappear from "git show -C -C" output when file bar is a binary file. Signed-off-by: Christian Couder Signed-off-by: Junio C Hamano --- diff.c | 23 +++++++++++++----- t/t4015-diff-whitespace.sh | 37 ++++++++++++++++++++++++++++ t/t4043-diff-rename-binary.sh | 45 +++++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+), 6 deletions(-) create mode 100755 t/t4043-diff-rename-binary.sh diff --git a/diff.c b/diff.c index a2d8c7f9a..426fd0466 100644 --- a/diff.c +++ b/diff.c @@ -1596,6 +1596,7 @@ static void builtin_diff(const char *name_a, struct diff_filespec *one, struct diff_filespec *two, const char *xfrm_msg, + int must_show_header, struct diff_options *o, int complete_rewrite) { @@ -1647,16 +1648,19 @@ static void builtin_diff(const char *name_a, strbuf_addf(&header, "%snew file mode %06o%s\n", set, two->mode, reset); if (xfrm_msg && xfrm_msg[0]) strbuf_addf(&header, "%s%s%s\n", set, xfrm_msg, reset); + must_show_header = 1; } else if (lbl[1][0] == '/') { strbuf_addf(&header, "%sdeleted file mode %06o%s\n", set, one->mode, reset); if (xfrm_msg && xfrm_msg[0]) strbuf_addf(&header, "%s%s%s\n", set, xfrm_msg, reset); + must_show_header = 1; } else { if (one->mode != two->mode) { strbuf_addf(&header, "%sold mode %06o%s\n", set, one->mode, reset); strbuf_addf(&header, "%snew mode %06o%s\n", set, two->mode, reset); + must_show_header = 1; } if (xfrm_msg && xfrm_msg[0]) strbuf_addf(&header, "%s%s%s\n", set, xfrm_msg, reset); @@ -1687,8 +1691,11 @@ static void builtin_diff(const char *name_a, (diff_filespec_is_binary(two) && !textconv_two) )) { /* Quite common confusing case */ if (mf1.size == mf2.size && - !memcmp(mf1.ptr, mf2.ptr, mf1.size)) + !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { + if (must_show_header) + fprintf(o->file, "%s", header.buf); goto free_ab_and_return; + } fprintf(o->file, "%s", header.buf); strbuf_reset(&header); if (DIFF_OPT_TST(o, BINARY)) @@ -1706,7 +1713,7 @@ static void builtin_diff(const char *name_a, struct emit_callback ecbdata; const struct userdiff_funcname *pe; - if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS)) { + if (!DIFF_XDL_TST(o, WHITESPACE_FLAGS) || must_show_header) { fprintf(o->file, "%s", header.buf); strbuf_reset(&header); } @@ -2315,8 +2322,10 @@ static void fill_metainfo(struct strbuf *msg, struct diff_filespec *one, struct diff_filespec *two, struct diff_options *o, - struct diff_filepair *p) + struct diff_filepair *p, + int *must_show_header) { + *must_show_header = 1; strbuf_init(msg, PATH_MAX * 2 + 300); switch (p->status) { case DIFF_STATUS_COPIED: @@ -2344,7 +2353,7 @@ static void fill_metainfo(struct strbuf *msg, /* fallthru */ default: /* nothing */ - ; + *must_show_header = 0; } if (one && two && hashcmp(one->sha1, two->sha1)) { int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; @@ -2378,9 +2387,10 @@ static void run_diff_cmd(const char *pgm, { const char *xfrm_msg = NULL; int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; + int must_show_header = 0; if (msg) { - fill_metainfo(msg, name, other, one, two, o, p); + fill_metainfo(msg, name, other, one, two, o, p, &must_show_header); xfrm_msg = msg->len ? msg->buf : NULL; } @@ -2399,7 +2409,8 @@ static void run_diff_cmd(const char *pgm, } if (one && two) builtin_diff(name, other ? other : name, - one, two, xfrm_msg, o, complete_rewrite); + one, two, xfrm_msg, must_show_header, + o, complete_rewrite); else fprintf(o->file, "* Unmerged path %s\n", name); } diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh index 90f334237..7e78851a1 100755 --- a/t/t4015-diff-whitespace.sh +++ b/t/t4015-diff-whitespace.sh @@ -396,6 +396,43 @@ test_expect_success 'whitespace-only changes not reported' ' test_cmp expect actual ' +cat <expect +diff --git a/x b/z +similarity index NUM% +rename from x +rename to z +index 380c32a..a97b785 100644 +EOF +test_expect_success 'whitespace-only changes reported across renames' ' + git reset --hard && + for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i"; done >x && + git add x && + git commit -m "base" && + sed -e "5s/^/ /" x >z && + git rm x && + git add z && + git diff -w -M --cached | + sed -e "/^similarity index /s/[0-9][0-9]*/NUM/" >actual && + test_cmp expect actual +' + +cat >expected <<\EOF +diff --git a/empty b/void +similarity index 100% +rename from empty +rename to void +EOF + +test_expect_success 'rename empty' ' + git reset --hard && + >empty && + git add empty && + git commit -m empty && + git mv empty void && + git diff -w --cached -M >current && + test_cmp expected current +' + test_expect_success 'combined diff with autocrlf conversion' ' git reset --hard && diff --git a/t/t4043-diff-rename-binary.sh b/t/t4043-diff-rename-binary.sh new file mode 100755 index 000000000..06012811a --- /dev/null +++ b/t/t4043-diff-rename-binary.sh @@ -0,0 +1,45 @@ +#!/bin/sh +# +# Copyright (c) 2010 Jakub Narebski, Christian Couder +# + +test_description='Move a binary file' + +. ./test-lib.sh + + +test_expect_success 'prepare repository' ' + git init && + echo foo > foo && + echo "barQ" | q_to_nul > bar && + git add . && + git commit -m "Initial commit" +' + +test_expect_success 'move the files into a "sub" directory' ' + mkdir sub && + git mv bar foo sub/ && + git commit -m "Moved to sub/" +' + +cat > expected <<\EOF + bar => sub/bar | Bin 5 -> 5 bytes + foo => sub/foo | 0 + 2 files changed, 0 insertions(+), 0 deletions(-) + +diff --git a/bar b/sub/bar +similarity index 100% +rename from bar +rename to sub/bar +diff --git a/foo b/sub/foo +similarity index 100% +rename from foo +rename to sub/foo +EOF + +test_expect_success 'git show -C -C report renames' ' + git show -C -C --raw --binary --stat | tail -n 12 > current && + test_cmp expected current +' + +test_done -- 2.30.2