Hunks with less prefix context than suffix context (after applying fuzz) must apply at the start of the file if their first line number is 1. Is set to 2 or more, the first two and last two lines of context are ignored, and another scan is made. If that fails, and the maximum fuzz factor Maximum fuzz factor is set to 1 or more, then another scan takes place ignoring the first and last line of context. If no such place is found, and it's a context diff, and the
Linux patch file to patch Patch#
First patch looks for a place where all lines of the context match. If that is not the correct place, patch scans both forwards and backwards for a set of lines matching the context
Linux patch file to patch plus#
As a first guess, it takes the line number mentioned for the hunk, plus or minus any offset With context diffs, and to a lesser extent with normal diffs, patch can detect when the line numbers mentioned in the patch are incorrect, andĪttempts to find the correct place to apply each hunk of the patch. After removing indenting or encapsulation, lines beginning with # are ignored, as they are considered to be comments. If the entire diff is indented by a consistent amount, or if a context diff contains lines ending inĬRLF or is encapsulated one or more times by prepending " - " to lines starting with " -" as specified by Internet RFC 934, this is Thus you could feed an article or message containing aĭiff listing to patch, and it should work. Patch tries to skip any leading garbage, apply the diff, and then skip any trailing garbage. Patch program itself, while ed diffs are simply fed to the ed(1) editor via a pipe. Context diffs (old-style, new-style, and unified) and normal diffs are applied by the Upon startup, patch attempts to determine the type of the diff listing, unless overruled by a -c ( -context), -e ( -ed), Specified on the command line as originalfile. The names of the files to be patched are usually taken from the patch file, but if there's just one file to be patched it can be Normally the patched versions are put in place of the originals. More original files, producing patched versions. Patch takes a patch file patchfile containing a difference listing produced by the diff program and applies those differences to one or
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