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diff --git a/docs/misc/patch.html b/docs/misc/patch.html new file mode 100644 index 0000000..3d926ac --- /dev/null +++ b/docs/misc/patch.html @@ -0,0 +1,163 @@ +<!DOCTYPE html> +<html> +<head> + + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + + <style type="text/css"> + @import url('css/main.css'); + </style> + + <title> + Libreboot documentation: using diff and patch + </title> + +</head> + +<body> + + <header> + <h1 id="pagetop">Diff and patch</h1> + <aside>This is just a quick guide for reference, use 'man' to know more.</aside> + </header> + + <p> + <a href="index.html">back to index</a> + </p> + +<hr/> + + <h1> + Apply a patch + </h1> + + <p class="important"> + To apply a patch to a single file, do that in it's directory:<br/> + <b>$ patch < foo.patch</b> + </p> + + <p> + Assuming that the patch is distributed in unified format identifying + the file the patch should be applied to, the above will work. Otherwise:<br/> + <b>$ patch foo.txt < bar.patch</b> + </p> + + <p> + You can apply a patch to an entire directory, but note the "p level". + What this means is that inside patch files will be the files that you + intend to patch, identified by path names that might be different + when the files ane located on your own computer instead of on the computer + where the patch was created. 'p' level instructs the 'patch' utility to + ignore parts of the path name to identify the files correctly. Usually a + p level of 1 will work, so you would use:<br/> + <b>$ patch -p1 < baz.patch</b> + </p> + + <p> + Change to the top level directory before running this. If a patch level + of 1 cannot identify the files to patch, then inspect the patch file for file names. + For example:<br/> + <b>/home/user/do/not/panic/yet.c</b> + </p> + + <p> + and you are working in a directory that contains panic/yet.c, use:<br/> + <b>$ patch -p5 < baz.patch</b> + </p> + + <p> + You usually count one up for each path separator (forward slash) + removed from the beginning of the path, until you are left with a path + that exists in the current working directory. The count is the p level. + </p> + + <p> + Removing a patch using the -R flag<br/> + <b>$ patch -p5 -R < baz.patch</b> + </p> + + <p><a href="#pagetop">Back to top of page.</a></p> + +<hr/> + + <h1> + Create a patch with diff + </h1> + + <p> + Diff can create a patch for a single file:<br/> + <b>$ diff -u original.c new.c > original.patch</b> + </p> + + <p> + For diff'ing a source tree:<br/> + <b>$ cp -R original new</b> + </p> + + <p> + Do whatever you want in new/ and then diff it:<br/> + <b>$ diff -rupN original/ new/ > original.patch</b> + </p> + + <p><a href="#pagetop">Back to top of page.</a></p> + +<hr/> + + <h1> + git diff + </h1> + + <p> + git is something special. + </p> + + <p> + Just make whatever changes you want to a git clone and then:<br/> + <b>$ git diff > patch.git</b> + </p> + + <p> + Note the git revision that you did this with:<br/> + <b>$ git log</b> + </p> + + <p><a href="#pagetop">Back to top of page.</a></p> + +<hr/> + + <h1> + git apply + </h1> + + <p>it really is.</p> + + <p> + Now to apply that patch in the future, just git clone it again and do + with the git revision you found from above:<br/> + <b>$ git reset --hard REVISIONNUMBER</b> + </p> + + <p> + Now put patch.git in the git clone directory and do:<br/> + <b>$ git apply patch.git</b> + </p> + + <p><a href="#pagetop">Back to top of page.</a></p> + +<hr/> + + <p> + Copyright © 2014 Francis Rowe <info@gluglug.org.uk><br/> + This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions. + A copy of the license can be found at <a href="../license.txt">../license.txt</a>. + </p> + + <p> + This document is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See <a href="../license.txt">../license.txt</a> for more information. + </p> + +</body> +</html> |