[PATCH v2 1/2] rev-parse: add --filename-prefix option
- From
John Keeping <john@keeping.me.uk>
- Date
- Apr 9, 2013, 20:29 UTC
- Message-ID
- <0d570e110dbf714310f9cbc4fa47e711630707f2.1365539059.git.john@keeping.me.uk>
- In-Reply-To
- <cover.1365539059.git.john@keeping.me.uk>
This adds a prefix string to any filename arguments encountered after it has been specified.
Signed-off-by: John Keeping <john@keeping.me.uk> --- Documentation/git-rev-parse.txt | 16 ++++++++ builtin/rev-parse.c | 24 ++++++++--- t/t1513-rev-parse-prefix.sh | 90 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 125 insertions(+), 5 deletions(-) create mode 100755 t/t1513-rev-parse-prefix.sh
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt index 1f9ed6c..0ab2b77 100644 --- a/Documentation/git-rev-parse.txt +++ b/Documentation/git-rev-parse.txt @@ -59,6 +59,22 @@ OPTIONS If there is no parameter given by the user, use `<arg>` instead. +--prefix <arg>:: + Behave as if 'git rev-parse' was invoked from the `<arg>` + subdirectory of the working tree. Any relative filenames are + resolved as if they are prefixed by `<arg>` and will be printed + in that form. ++ +This can be used to convert arguments to a command run in a subdirectory +so that they can still be used after moving to the top-level of the +repository. For example: ++ +---- +prefix=$(git rev-parse --show-prefix) +cd "$(git rev-parse --show-toplevel)" +eval "set -- $(git rev-parse --sq --prefix "$prefix" "$@")" +---- + --verify:: Verify that exactly one parameter is provided, and that it can be turned into a raw 20-byte SHA-1 that can be used to diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c index f267a1d..de894c7 100644 --- a/builtin/rev-parse.c +++ b/builtin/rev-parse.c @@ -212,11 +212,17 @@ static void show_datestring(const char *flag, const char *datestr) show(buffer); } -static int show_file(const char *arg) +static int show_file(const char *arg, int output_prefix) { show_default(); if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) { - show(arg); + if (output_prefix) { + const char *prefix = startup_info->prefix; + show(prefix_filename(prefix, + prefix ? strlen(prefix) : 0, + arg)); + } else + show(arg); return 1; } return 0; @@ -470,6 +476,7 @@ N_("git rev-parse --parseopt [options] -- [<args>...]\n" int cmd_rev_parse(int argc, const char **argv, const char *prefix) { int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0; + int output_prefix = 0; unsigned char sha1[20]; const char *name = NULL; @@ -503,7 +510,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix) const char *arg = argv[i]; if (as_is) { - if (show_file(arg) && as_is < 2) + if (show_file(arg, output_prefix) && as_is < 2) verify_filename(prefix, arg, 0); continue; } @@ -527,7 +534,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix) as_is = 2; /* Pass on the "--" if we show anything but files.. */ if (filter & (DO_FLAGS | DO_REVS)) - show_file(arg); + show_file(arg, 0); continue; } if (!strcmp(arg, "--default")) { @@ -535,6 +542,13 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix) i++; continue; } + if (!strcmp(arg, "--prefix")) { + prefix = argv[i+1]; + startup_info->prefix = prefix; + output_prefix = 1; + i++; + continue; + } if (!strcmp(arg, "--revs-only")) { filter &= ~DO_NOREV; continue; @@ -754,7 +768,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix) if (verify) die_no_single_rev(quiet); as_is = 1; - if (!show_file(arg)) + if (!show_file(arg, output_prefix)) continue; verify_filename(prefix, arg, 1); } diff --git a/t/t1513-rev-parse-prefix.sh b/t/t1513-rev-parse-prefix.sh new file mode 100755 index 0000000..5ef48d2 --- /dev/null +++ b/t/t1513-rev-parse-prefix.sh @@ -0,0 +1,90 @@ +#!/bin/sh + +test_description='Tests for rev-parse --prefix' + +. ./test-lib.sh + +test_expect_success 'setup' ' + mkdir -p sub1/sub2 && + echo top >top && + echo file1 >sub1/file1 && + echo file2 >sub1/sub2/file2 && + git add top sub1/file1 sub1/sub2/file2 && + git commit -m commit +' + +test_expect_success 'empty prefix -- file' ' + git rev-parse --prefix "" -- top sub1/file1 >actual && + cat <<-EOF >expected && + -- + top + sub1/file1 + EOF + test_cmp expected actual +' + +test_expect_success 'valid prefix -- file' ' + git rev-parse --prefix sub1/ -- file1 sub2/file2 >actual && + cat <<-EOF >expected && + -- + sub1/file1 + sub1/sub2/file2 + EOF + test_cmp expected actual +' + +test_expect_success 'valid prefix -- ../file' ' + git rev-parse --prefix sub1/ -- ../top sub2/file2 >actual && + cat <<-EOF >expected && + -- + sub1/../top + sub1/sub2/file2 + EOF + test_cmp expected actual +' + +test_expect_success 'empty prefix HEAD:./path' ' + git rev-parse --prefix "" HEAD:./top >actual && + git rev-parse HEAD:top >expected && + test_cmp expected actual +' + +test_expect_success 'valid prefix HEAD:./path' ' + git rev-parse --prefix sub1/ HEAD:./file1 >actual && + git rev-parse HEAD:sub1/file1 >expected && + test_cmp expected actual +' + +test_expect_success 'valid prefix HEAD:../path' ' + git rev-parse --prefix sub1/ HEAD:../top >actual && + git rev-parse HEAD:top >expected && + test_cmp expected actual +' + +test_expect_success 'disambiguate path with valid prefix' ' + git rev-parse --prefix sub1/ file1 >actual && + cat <<-EOF >expected && + sub1/file1 + EOF + test_cmp expected actual +' + +test_expect_success 'file and refs with prefix' ' + git rev-parse --prefix sub1/ master file1 >actual && + cat <<-EOF >expected && + $(git rev-parse master) + sub1/file1 + EOF + test_cmp expected actual +' + +test_expect_success 'two-levels deep' ' + git rev-parse --prefix sub1/sub2/ -- file2 >actual && + cat <<-EOF >expected && + -- + sub1/sub2/file2 + EOF + test_cmp expected actual +' + +test_done
-- 1.8.2.694.ga76e9c3.dirty