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-rw-r--r--toys/posix/patch.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/toys/posix/patch.c b/toys/posix/patch.c
index 23fe83a0..2c73d958 100644
--- a/toys/posix/patch.c
+++ b/toys/posix/patch.c
@@ -18,21 +18,23 @@
* -F fuzz (number, default 2)
* [file] which file to patch
-USE_PATCH(NEWTOY(patch, USE_TOYBOX_DEBUG("x")"ulp#i:R", TOYFLAG_USR|TOYFLAG_BIN))
+USE_PATCH(NEWTOY(patch, "(dry-run)"USE_TOYBOX_DEBUG("x")"d:ulp#i:R", TOYFLAG_USR|TOYFLAG_BIN))
config PATCH
bool "patch"
default y
help
- usage: patch [-i file] [-p depth] [-Ru]
+ usage: patch [-d DIR] [-i file] [-p depth] [-Rlu] [--dry-run]
Apply a unified diff to one or more files.
+ -d modify files in DIR
-i Input file (defaults=stdin)
-l Loose match (ignore whitespace)
-p Number of '/' to strip from start of file paths (default=all)
-R Reverse patch.
-u Ignored (only handles "unified" diffs)
+ --dry-run Don't change files, just confirm patch applies
This version of patch only handles unified diffs, and only modifies
a file when all all hunks to that file apply. Patch prints failed
@@ -48,6 +50,7 @@ config PATCH
GLOBALS(
char *infile;
long prefix;
+ char *dir;
struct double_list *current_hunk;
long oldline, oldlen, newline, newlen;
@@ -102,7 +105,8 @@ static void fail_hunk(void)
TT.state = 2;
llist_traverse(TT.current_hunk, do_line);
TT.current_hunk = NULL;
- delete_tempfile(TT.filein, TT.fileout, &TT.tempname);
+ if (!(toys.optflags & FLAG_dry_run))
+ delete_tempfile(TT.filein, TT.fileout, &TT.tempname);
TT.state = 0;
}
@@ -264,6 +268,8 @@ void patch_main(void)
if (TT.infile) TT.filepatch = xopen(TT.infile, O_RDONLY);
TT.filein = TT.fileout = -1;
+ if (TT.dir) xchdir(TT.dir);
+
// Loop through the lines in the patch
for (;;) {
char *patchline;
@@ -398,7 +404,9 @@ void patch_main(void)
printf("patching %s\n", name);
TT.filein = xopen(name, O_RDONLY);
}
- TT.fileout = copy_tempfile(TT.filein, name, &TT.tempname);
+ if (toys.optflags & FLAG_dry_run)
+ TT.fileout = xopen("/dev/null", O_RDWR);
+ else TT.fileout = copy_tempfile(TT.filein, name, &TT.tempname);
TT.linenum = 0;
TT.hunknum = 0;
}