diff options
| -rw-r--r-- | builtin/apply.c | 31 | ||||
| -rwxr-xr-x | t/t4138-apply-ws-expansion.sh | 121 |
2 files changed, 149 insertions, 3 deletions
diff --git a/builtin/apply.c b/builtin/apply.c index 23bda96..955cc79 100644 --- a/builtin/apply.c +++ b/builtin/apply.c @@ -2230,6 +2230,12 @@ static void update_pre_post_images(struct image *preimage, ctx++; } + if (postlen + ? postlen < new - postimage->buf + : postimage->len < new - postimage->buf) + die("BUG: caller miscounted postlen: asked %d, orig = %d, used = %d", + (int)postlen, (int) postimage->len, (int)(new - postimage->buf)); + /* Fix the length of the whole thing */ postimage->len = new - postimage->buf; postimage->nr -= reduced; @@ -2385,10 +2391,27 @@ static int match_fragment(struct image *img, /* * The hunk does not apply byte-by-byte, but the hash says - * it might with whitespace fuzz. We haven't been asked to + * it might with whitespace fuzz. We weren't asked to * ignore whitespace, we were asked to correct whitespace * errors, so let's try matching after whitespace correction. * + * While checking the preimage against the target, whitespace + * errors in both fixed, we count how large the corresponding + * postimage needs to be. The postimage prepared by + * apply_one_fragment() has whitespace errors fixed on added + * lines already, but the common lines were propagated as-is, + * which may become longer when their whitespace errors are + * fixed. + */ + + /* First count added lines in postimage */ + postlen = 0; + for (i = 0; i < postimage->nr; i++) { + if (!(postimage->line[i].flag & LINE_COMMON)) + postlen += postimage->line[i].len; + } + + /* * The preimage may extend beyond the end of the file, * but in this loop we will only handle the part of the * preimage that falls within the file. @@ -2396,7 +2419,6 @@ static int match_fragment(struct image *img, strbuf_init(&fixed, preimage->len + 1); orig = preimage->buf; target = img->buf + try; - postlen = 0; for (i = 0; i < preimage_limit; i++) { size_t oldlen = preimage->line[i].len; size_t tgtlen = img->line[try_lno + i].len; @@ -2424,7 +2446,10 @@ static int match_fragment(struct image *img, match = (tgtfix.len == fixed.len - fixstart && !memcmp(tgtfix.buf, fixed.buf + fixstart, fixed.len - fixstart)); - postlen += tgtfix.len; + + /* Add the length if this is common with the postimage */ + if (preimage->line[i].flag & LINE_COMMON) + postlen += tgtfix.len; strbuf_release(&tgtfix); if (!match) diff --git a/t/t4138-apply-ws-expansion.sh b/t/t4138-apply-ws-expansion.sh new file mode 100755 index 0000000..0ffe33f --- /dev/null +++ b/t/t4138-apply-ws-expansion.sh @@ -0,0 +1,121 @@ +#!/bin/sh +# +# Copyright (C) 2015 Kyle J. McKay +# + +test_description='git apply test patches with whitespace expansion.' + +. ./test-lib.sh + +test_expect_success setup ' + # + ## create test-N, patchN.patch, expect-N files + # + + # test 1 + printf "\t%s\n" 1 2 3 4 5 6 >before && + printf "\t%s\n" 1 2 3 >after && + printf "%64s\n" a b c >>after && + printf "\t%s\n" 4 5 6 >>after && + git diff --no-index before after | + sed -e "s/before/test-1/" -e "s/after/test-1/" >patch1.patch && + printf "%64s\n" 1 2 3 4 5 6 >test-1 && + printf "%64s\n" 1 2 3 a b c 4 5 6 >expect-1 && + + # test 2 + printf "\t%s\n" a b c d e f >before && + printf "\t%s\n" a b c >after && + n=10 && + x=1 && + while test $x -lt $n + do + printf "%63s%d\n" "" $x >>after + x=$(( $x + 1 )) + done && + printf "\t%s\n" d e f >>after && + git diff --no-index before after | + sed -e "s/before/test-2/" -e "s/after/test-2/" >patch2.patch && + printf "%64s\n" a b c d e f >test-2 && + printf "%64s\n" a b c >expect-2 && + x=1 && + while test $x -lt $n + do + printf "%63s%d\n" "" $x >>expect-2 + x=$(( $x + 1 )) + done && + printf "%64s\n" d e f >>expect-2 && + + # test 3 + printf "\t%s\n" a b c d e f >before && + printf "\t%s\n" a b c >after && + n=100 && + x=0 && + while test $x -lt $n + do + printf "%63s%02d\n" "" $x >>after + x=$(( $x + 1 )) + done && + printf "\t%s\n" d e f >>after && + git diff --no-index before after | + sed -e "s/before/test-3/" -e "s/after/test-3/" >patch3.patch && + printf "%64s\n" a b c d e f >test-3 && + printf "%64s\n" a b c >expect-3 && + x=0 && + while test $x -lt $n + do + printf "%63s%02d\n" "" $x >>expect-3 + x=$(( $x + 1 )) + done && + printf "%64s\n" d e f >>expect-3 && + + # test 4 + >before && + x=0 && + while test $x -lt 50 + do + printf "\t%02d\n" $x >>before + x=$(( $x + 1 )) + done && + cat before >after && + printf "%64s\n" a b c >>after && + while test $x -lt 100 + do + printf "\t%02d\n" $x >>before + printf "\t%02d\n" $x >>after + x=$(( $x + 1 )) + done && + git diff --no-index before after | + sed -e "s/before/test-4/" -e "s/after/test-4/" >patch4.patch && + >test-4 && + x=0 && + while test $x -lt 50 + do + printf "%63s%02d\n" "" $x >>test-4 + x=$(( $x + 1 )) + done && + cat test-4 >expect-4 && + printf "%64s\n" a b c >>expect-4 && + while test $x -lt 100 + do + printf "%63s%02d\n" "" $x >>test-4 + printf "%63s%02d\n" "" $x >>expect-4 + x=$(( $x + 1 )) + done && + + git config core.whitespace tab-in-indent,tabwidth=63 && + git config apply.whitespace fix + +' + +# Note that `patch` can successfully apply all patches when run +# with the --ignore-whitespace option. + +for t in 1 2 3 4 +do + test_expect_success 'apply with ws expansion (t=$t)' ' + git apply patch$t.patch && + test_cmp test-$t expect-$t + ' +done + +test_done |