diff options
Diffstat (limited to 'toys/posix/patch.c')
| -rw-r--r-- | toys/posix/patch.c | 16 |
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; } |