зеркало из https://github.com/microsoft/git.git
Merge branch 'jk/diff-convfilter-test-fix'
* jk/diff-convfilter-test-fix: Avoid using non-portable `echo -n` in tests. add userdiff textconv tests document the diff driver textconv feature diff: add missing static declaration Conflicts: Documentation/gitattributes.txt
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@ -216,10 +216,12 @@ Generating diff text
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`diff`
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^^^^^^
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The attribute `diff` affects if 'git-diff' generates textual
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patch for the path or just says `Binary files differ`. It also
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can affect what line is shown on the hunk header `@@ -k,l +n,m @@`
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line.
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The attribute `diff` affects how 'git' generates diffs for particular
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files. It can tell git whether to generate a textual patch for the path
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or to treat the path as a binary file. It can also affect what line is
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shown on the hunk header `@@ -k,l +n,m @@` line, tell git to use an
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external command to generate the diff, or ask git to convert binary
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files to a text format before generating the diff.
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Set::
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@ -230,7 +232,8 @@ Set::
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Unset::
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A path to which the `diff` attribute is unset will
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generate `Binary files differ`.
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generate `Binary files differ` (or a binary patch, if
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binary patches are enabled).
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Unspecified::
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@ -241,21 +244,21 @@ Unspecified::
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String::
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Diff is shown using the specified custom diff driver.
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The driver program is given its input using the same
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calling convention as used for GIT_EXTERNAL_DIFF
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program. This name is also used for custom hunk header
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selection.
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Diff is shown using the specified diff driver. Each driver may
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specify one or more options, as described in the following
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section. The options for the diff driver "foo" are defined
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by the configuration variables in the "diff.foo" section of the
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git config file.
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Defining a custom diff driver
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Defining an external diff driver
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The definition of a diff driver is done in `gitconfig`, not
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`gitattributes` file, so strictly speaking this manual page is a
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wrong place to talk about it. However...
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To define a custom diff driver `jcdiff`, add a section to your
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To define an external diff driver `jcdiff`, add a section to your
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`$GIT_DIR/config` file (or `$HOME/.gitconfig` file) like this:
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----------------------------------------------------------------
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@ -331,6 +334,43 @@ patterns are available:
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- `tex` suitable for source code for LaTeX documents.
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Performing text diffs of binary files
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Sometimes it is desirable to see the diff of a text-converted
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version of some binary files. For example, a word processor
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document can be converted to an ASCII text representation, and
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the diff of the text shown. Even though this conversion loses
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some information, the resulting diff is useful for human
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viewing (but cannot be applied directly).
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The `textconv` config option is used to define a program for
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performing such a conversion. The program should take a single
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argument, the name of a file to convert, and produce the
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resulting text on stdout.
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For example, to show the diff of the exif information of a
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file instead of the binary information (assuming you have the
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exif tool installed):
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------------------------
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[diff "jpg"]
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textconv = exif
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------------------------
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NOTE: The text conversion is generally a one-way conversion;
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in this example, we lose the actual image contents and focus
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just on the text data. This means that diffs generated by
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textconv are _not_ suitable for applying. For this reason,
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only `git diff` and the `git log` family of commands (i.e.,
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log, whatchanged, show) will perform text conversion. `git
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format-patch` will never generate this output. If you want to
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send somebody a text-converted diff of a binary file (e.g.,
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because it quickly conveys the changes you have made), you
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should generate it separately and send it as a comment _in
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addition to_ the usual binary diff that you might send.
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Performing a three-way merge
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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2
diff.c
2
diff.c
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@ -1283,7 +1283,7 @@ static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two)
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emit_binary_diff_body(file, two, one);
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}
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void diff_filespec_load_driver(struct diff_filespec *one)
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static void diff_filespec_load_driver(struct diff_filespec *one)
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{
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if (!one->driver)
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one->driver = userdiff_find_by_path(one->path);
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@ -13,7 +13,7 @@ file if core.symlinks is false.'
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test_expect_success \
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'preparation' '
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git config core.symlinks false &&
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l=$(echo -n file | git hash-object -t blob -w --stdin) &&
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l=$(printf file | git hash-object -t blob -w --stdin) &&
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echo "120000 $l symlink" | git update-index --index-info'
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test_expect_success \
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@ -13,12 +13,12 @@ even if a plain file is in the working tree if core.symlinks is false.'
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test_expect_success \
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'preparation' '
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git config core.symlinks false &&
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l=$(echo -n file | git hash-object -t blob -w --stdin) &&
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l=$(printf file | git hash-object -t blob -w --stdin) &&
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echo "120000 $l symlink" | git update-index --index-info'
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test_expect_success \
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'modify the symbolic link' '
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echo -n new-file > symlink &&
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printf new-file > symlink &&
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git update-index symlink'
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test_expect_success \
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@ -0,0 +1,118 @@
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#!/bin/sh
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test_description='diff.*.textconv tests'
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. ./test-lib.sh
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find_diff() {
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sed '1,/^index /d' | sed '/^-- $/,$d'
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}
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cat >expect.binary <<'EOF'
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Binary files a/file and b/file differ
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EOF
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cat >expect.text <<'EOF'
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--- a/file
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+++ b/file
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@@ -1 +1,2 @@
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0
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+1
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EOF
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cat >hexdump <<'EOF'
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#!/bin/sh
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perl -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' "$1"
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EOF
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chmod +x hexdump
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test_expect_success 'setup binary file with history' '
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printf "\\0\\n" >file &&
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git add file &&
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git commit -m one &&
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printf "\\1\\n" >>file &&
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git add file &&
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git commit -m two
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'
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test_expect_success 'file is considered binary by porcelain' '
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git diff HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.binary actual
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'
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test_expect_success 'file is considered binary by plumbing' '
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git diff-tree -p HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.binary actual
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'
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test_expect_success 'setup textconv filters' '
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echo file diff=foo >.gitattributes &&
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git config diff.foo.textconv "$PWD"/hexdump &&
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git config diff.fail.textconv false
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'
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test_expect_failure 'diff produces text' '
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git diff HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.text actual
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'
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test_expect_success 'diff-tree produces binary' '
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git diff-tree -p HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.binary actual
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'
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test_expect_failure 'log produces text' '
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git log -1 -p >log &&
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find_diff <log >actual &&
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test_cmp expect.text actual
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'
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test_expect_failure 'format-patch produces binary' '
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git format-patch --no-binary --stdout HEAD^ >patch &&
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find_diff <patch >actual &&
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test_cmp expect.binary actual
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'
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cat >expect.stat <<'EOF'
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file | Bin 2 -> 4 bytes
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1 files changed, 0 insertions(+), 0 deletions(-)
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EOF
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test_expect_failure 'diffstat does not run textconv' '
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echo file diff=fail >.gitattributes &&
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git diff --stat HEAD^ HEAD >actual &&
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test_cmp expect.stat actual
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'
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# restore working setup
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echo file diff=foo >.gitattributes
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cat >expect.typechange <<'EOF'
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--- a/file
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+++ /dev/null
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@@ -1,2 +0,0 @@
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-0
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-1
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diff --git a/file b/file
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new file mode 120000
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index ad8b3d2..67be421
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--- /dev/null
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+++ b/file
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@@ -0,0 +1 @@
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+frotz
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\ No newline at end of file
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EOF
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# make a symlink the hard way that works on symlink-challenged file systems
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test_expect_failure 'textconv does not act on symlinks' '
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printf frotz > file &&
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git add file &&
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git ls-files -s | sed -e s/100644/120000/ |
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git update-index --index-info &&
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git commit -m typechange &&
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git show >diff &&
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find_diff <diff >actual &&
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test_cmp expect.typechange actual
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'
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test_done
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@ -18,11 +18,11 @@ git add file &&
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git commit -m initial &&
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git branch b-symlink &&
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git branch b-file &&
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l=$(echo -n file | git hash-object -t blob -w --stdin) &&
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l=$(printf file | git hash-object -t blob -w --stdin) &&
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echo "120000 $l symlink" | git update-index --index-info &&
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git commit -m master &&
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git checkout b-symlink &&
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l=$(echo -n file-different | git hash-object -t blob -w --stdin) &&
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l=$(printf file-different | git hash-object -t blob -w --stdin) &&
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echo "120000 $l symlink" | git update-index --index-info &&
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git commit -m b-symlink &&
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git checkout b-file &&
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@ -424,7 +424,7 @@ cd "$WORKDIR"
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test_expect_success 'cvs update (-p)' '
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touch really-empty &&
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echo Line 1 > no-lf &&
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echo -n Line 2 >> no-lf &&
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printf "Line 2" >> no-lf &&
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git add really-empty no-lf &&
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git commit -q -m "Update -p test" &&
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git push gitcvs.git >/dev/null &&
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