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Teach "git apply" to prepend a prefix with "--root=<root>"
With "git apply --root=<root>", all file names in the patch are prepended with <root>. If a "-p" value was given, the paths are stripped _before_ prepending <root>. Wished for by HPA. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -14,7 +14,7 @@ SYNOPSIS
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[--allow-binary-replacement | --binary] [--reject] [-z]
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[-pNUM] [-CNUM] [--inaccurate-eof] [--cached]
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[--whitespace=<nowarn|warn|fix|error|error-all>]
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[--exclude=PATH] [--verbose] [<patch>...]
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[--exclude=PATH] [--root=<root>] [--verbose] [<patch>...]
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DESCRIPTION
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-----------
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@ -177,6 +177,10 @@ behavior:
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current patch being applied will be printed. This option will cause
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additional information to be reported.
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--root=<root>::
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Prepend <root> to all filenames. If a "-p" argument was passed, too,
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it is applied before prepending the new root.
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Configuration
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-------------
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@ -57,6 +57,8 @@ static int whitespace_error;
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static int squelch_whitespace_errors = 5;
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static int applied_after_fixing_ws;
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static const char *patch_input_file;
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static const char *root;
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static int root_len;
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static void parse_whitespace_option(const char *option)
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{
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@ -331,6 +333,8 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
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*/
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strbuf_remove(&name, 0, cp - name.buf);
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free(def);
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if (root)
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strbuf_insert(&name, 0, root, root_len);
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return strbuf_detach(&name, NULL);
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}
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}
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@ -369,6 +373,14 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
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free(def);
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}
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if (root) {
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char *ret = xmalloc(root_len + len + 1);
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strcpy(ret, root);
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memcpy(ret + root_len, start, len);
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ret[root_len + len] = '\0';
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return ret;
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}
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return xmemdupz(start, len);
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}
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@ -3118,6 +3130,18 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
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inaccurate_eof = 1;
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continue;
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}
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if (!strncmp(arg, "--root=", strlen("--root="))) {
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arg += strlen("--root=");
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root_len = strlen(arg);
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if (root_len && arg[root_len + 1] != '/') {
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char *new_root;
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root = new_root = xmalloc(root_len + 2);
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strcpy(new_root, arg);
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strcpy(new_root + root_len++, "/");
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} else
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root = arg;
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continue;
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}
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if (0 < prefix_length)
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arg = prefix_filename(prefix, prefix_length, arg);
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32
t/t4128-apply-root.sh
Executable file
32
t/t4128-apply-root.sh
Executable file
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@ -0,0 +1,32 @@
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#!/bin/sh
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test_description='apply same filename'
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. ./test-lib.sh
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test_expect_success 'setup' '
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mkdir -p some/sub/dir &&
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echo Hello > some/sub/dir/file &&
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git add some/sub/dir/file
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'
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cat > patch << EOF
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diff a/bla/blub/dir/file b/bla/blub/dir/file
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--- a/bla/blub/dir/file
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+++ b/bla/blub/dir/file
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@@ -1,1 +1,1 @@
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-Hello
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+Bello
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EOF
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test_expect_success 'apply --root -p --index' '
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git apply --root=some/sub -p3 --index patch &&
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test Bello = $(git show :some/sub/dir/file) &&
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test Bello = $(cat some/sub/dir/file)
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'
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test_done
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