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| Using Git to develop FFmpeg |
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| Using Git to develop FFmpeg |
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| <div class="element-contents" id="SEC_Contents"> |
| <h2 class="contents-heading">Table of Contents</h2> |
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| <div class="contents"> |
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| <ul class="toc-numbered-mark"> |
| <li><a id="toc-Introduction" href="#Introduction">1 Introduction</a></li> |
| <li><a id="toc-Basics-Usage" href="#Basics-Usage">2 Basics Usage</a> |
| <ul class="toc-numbered-mark"> |
| <li><a id="toc-Get-Git" href="#Get-Git">2.1 Get Git</a></li> |
| <li><a id="toc-Cloning-the-source-tree" href="#Cloning-the-source-tree">2.2 Cloning the source tree</a></li> |
| <li><a id="toc-Updating-the-source-tree-to-the-latest-revision-1" href="#Updating-the-source-tree-to-the-latest-revision-1">2.3 Updating the source tree to the latest revision</a></li> |
| <li><a id="toc-Rebasing-your-local-branches" href="#Rebasing-your-local-branches">2.4 Rebasing your local branches</a></li> |
| <li><a id="toc-Adding_002fremoving-files_002fdirectories" href="#Adding_002fremoving-files_002fdirectories">2.5 Adding/removing files/directories</a></li> |
| <li><a id="toc-Showing-modifications" href="#Showing-modifications">2.6 Showing modifications</a></li> |
| <li><a id="toc-Inspecting-the-changelog" href="#Inspecting-the-changelog">2.7 Inspecting the changelog</a></li> |
| <li><a id="toc-Checking-source-tree-status" href="#Checking-source-tree-status">2.8 Checking source tree status</a></li> |
| <li><a id="toc-Committing" href="#Committing">2.9 Committing</a></li> |
| <li><a id="toc-Writing-a-commit-message" href="#Writing-a-commit-message">2.10 Writing a commit message</a></li> |
| <li><a id="toc-Preparing-a-patchset" href="#Preparing-a-patchset">2.11 Preparing a patchset</a></li> |
| <li><a id="toc-Sending-patches-for-review" href="#Sending-patches-for-review">2.12 Sending patches for review</a></li> |
| <li><a id="toc-Renaming_002fmoving_002fcopying-files-or-contents-of-files" href="#Renaming_002fmoving_002fcopying-files-or-contents-of-files">2.13 Renaming/moving/copying files or contents of files</a></li> |
| </ul></li> |
| <li><a id="toc-Git-configuration" href="#Git-configuration">3 Git configuration</a> |
| <ul class="toc-numbered-mark"> |
| <li><a id="toc-Personal-Git-installation" href="#Personal-Git-installation">3.1 Personal Git installation</a></li> |
| <li><a id="toc-Repository-configuration" href="#Repository-configuration">3.2 Repository configuration</a></li> |
| </ul></li> |
| <li><a id="toc-FFmpeg-specific" href="#FFmpeg-specific">4 FFmpeg specific</a> |
| <ul class="toc-numbered-mark"> |
| <li><a id="toc-Reverting-broken-commits" href="#Reverting-broken-commits">4.1 Reverting broken commits</a></li> |
| <li><a id="toc-Pushing-changes-to-remote-trees" href="#Pushing-changes-to-remote-trees">4.2 Pushing changes to remote trees</a></li> |
| <li><a id="toc-Finding-a-specific-svn-revision" href="#Finding-a-specific-svn-revision">4.3 Finding a specific svn revision</a></li> |
| </ul></li> |
| <li><a id="toc-gpg-key-generation" href="#gpg-key-generation">5 gpg key generation</a></li> |
| <li><a id="toc-Pre_002dpush-checklist" href="#Pre_002dpush-checklist">6 Pre-push checklist</a></li> |
| <li><a id="toc-Server-Issues" href="#Server-Issues">7 Server Issues</a></li> |
| </ul> |
| </div> |
| </div> |
|
|
| <a name="Introduction"></a> |
| <h2 class="chapter">1 Introduction<span class="pull-right"><a class="anchor hidden-xs" href="#Introduction" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Introduction" aria-hidden="true">TOC</a></span></h2> |
|
|
| <p>This document aims in giving some quick references on a set of useful Git |
| commands. You should always use the extensive and detailed documentation |
| provided directly by Git: |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git --help |
| man git |
| </pre></div> |
|
|
| <p>shows you the available subcommands, |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git <command> --help |
| man git-<command> |
| </pre></div> |
|
|
| <p>shows information about the subcommand <command>. |
| </p> |
| <p>Additional information could be found on the |
| <a class="url" href="http://gitref.org">Git Reference</a> website. |
| </p> |
| <p>For more information about the Git project, visit the |
| <a class="url" href="http://git-scm.com/">Git website</a>. |
| </p> |
| <p>Consult these resources whenever you have problems, they are quite exhaustive. |
| </p> |
| <p>What follows now is a basic introduction to Git and some FFmpeg-specific |
| guidelines to ease the contribution to the project. |
| </p> |
| <a name="Basics-Usage"></a> |
| <h2 class="chapter">2 Basics Usage<span class="pull-right"><a class="anchor hidden-xs" href="#Basics-Usage" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Basics-Usage" aria-hidden="true">TOC</a></span></h2> |
|
|
| <a name="Get-Git"></a> |
| <h3 class="section">2.1 Get Git<span class="pull-right"><a class="anchor hidden-xs" href="#Get-Git" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Get-Git" aria-hidden="true">TOC</a></span></h3> |
|
|
| <p>You can get Git from <a class="url" href="http://git-scm.com/">http://git-scm.com/</a> |
| Most distribution and operating system provide a package for it. |
| </p> |
|
|
| <a name="Cloning-the-source-tree"></a> |
| <h3 class="section">2.2 Cloning the source tree<span class="pull-right"><a class="anchor hidden-xs" href="#Cloning-the-source-tree" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Cloning-the-source-tree" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git clone https://git.ffmpeg.org/ffmpeg.git <target> |
| </pre></div> |
|
|
| <p>This will put the FFmpeg sources into the directory <var class="var"><target></var>. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git clone git@source.ffmpeg.org:ffmpeg <target> |
| </pre></div> |
|
|
| <p>This will put the FFmpeg sources into the directory <var class="var"><target></var> and let |
| you push back your changes to the remote repository. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git clone git@ffmpeg.org:ffmpeg-web <target> |
| </pre></div> |
|
|
| <p>This will put the source of the FFmpeg website into the directory |
| <var class="var"><target></var> and let you push back your changes to the remote repository. |
| </p> |
| <p>If you don’t have write-access to the ffmpeg-web repository, you can |
| create patches after making a read-only ffmpeg-web clone: |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git clone git://ffmpeg.org/ffmpeg-web <target> |
| </pre></div> |
|
|
| <p>Make sure that you do not have Windows line endings in your checkouts, |
| otherwise you may experience spurious compilation failures. One way to |
| achieve this is to run |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git config --global core.autocrlf false |
| </pre></div> |
|
|
|
|
| <a class="anchor" id="Updating-the-source-tree-to-the-latest-revision"></a><a name="Updating-the-source-tree-to-the-latest-revision-1"></a> |
| <h3 class="section">2.3 Updating the source tree to the latest revision<span class="pull-right"><a class="anchor hidden-xs" href="#Updating-the-source-tree-to-the-latest-revision-1" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Updating-the-source-tree-to-the-latest-revision-1" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git pull (--rebase) |
| </pre></div> |
|
|
| <p>pulls in the latest changes from the tracked branch. The tracked branch |
| can be remote. By default the master branch tracks the branch master in |
| the remote origin. |
| </p> |
| <div class="warning"> |
| <p><code class="command">--rebase</code> (see below) is recommended. |
| </p></div> |
| <a name="Rebasing-your-local-branches"></a> |
| <h3 class="section">2.4 Rebasing your local branches<span class="pull-right"><a class="anchor hidden-xs" href="#Rebasing-your-local-branches" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Rebasing-your-local-branches" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git pull --rebase |
| </pre></div> |
|
|
| <p>fetches the changes from the main repository and replays your local commits |
| over it. This is required to keep all your local changes at the top of |
| FFmpeg’s master tree. The master tree will reject pushes with merge commits. |
| </p> |
|
|
| <a name="Adding_002fremoving-files_002fdirectories"></a> |
| <h3 class="section">2.5 Adding/removing files/directories<span class="pull-right"><a class="anchor hidden-xs" href="#Adding_002fremoving-files_002fdirectories" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Adding_002fremoving-files_002fdirectories" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git add [-A] <filename/dirname> |
| git rm [-r] <filename/dirname> |
| </pre></div> |
|
|
| <p>Git needs to get notified of all changes you make to your working |
| directory that makes files appear or disappear. |
| Line moves across files are automatically tracked. |
| </p> |
|
|
| <a name="Showing-modifications"></a> |
| <h3 class="section">2.6 Showing modifications<span class="pull-right"><a class="anchor hidden-xs" href="#Showing-modifications" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Showing-modifications" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git diff <filename(s)> |
| </pre></div> |
|
|
| <p>will show all local modifications in your working directory as unified diff. |
| </p> |
|
|
| <a name="Inspecting-the-changelog"></a> |
| <h3 class="section">2.7 Inspecting the changelog<span class="pull-right"><a class="anchor hidden-xs" href="#Inspecting-the-changelog" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Inspecting-the-changelog" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git log <filename(s)> |
| </pre></div> |
|
|
| <p>You may also use the graphical tools like <code class="command">gitview</code> or <code class="command">gitk</code> |
| or the web interface available at <a class="url" href="https://git.ffmpeg.org/ffmpeg.git">https://git.ffmpeg.org/ffmpeg.git</a>. |
| </p> |
| <a name="Checking-source-tree-status"></a> |
| <h3 class="section">2.8 Checking source tree status<span class="pull-right"><a class="anchor hidden-xs" href="#Checking-source-tree-status" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Checking-source-tree-status" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git status |
| </pre></div> |
|
|
| <p>detects all the changes you made and lists what actions will be taken in case |
| of a commit (additions, modifications, deletions, etc.). |
| </p> |
|
|
| <a name="Committing"></a> |
| <h3 class="section">2.9 Committing<span class="pull-right"><a class="anchor hidden-xs" href="#Committing" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Committing" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git diff --check |
| </pre></div> |
|
|
| <p>to double check your changes before committing them to avoid trouble later |
| on. All experienced developers do this on each and every commit, no matter |
| how small. |
| </p> |
| <p>Every one of them has been saved from looking like a fool by this many times. |
| It’s very easy for stray debug output or cosmetic modifications to slip in, |
| please avoid problems through this extra level of scrutiny. |
| </p> |
| <p>For cosmetics-only commits you should get (almost) empty output from |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git diff -w -b <filename(s)> |
| </pre></div> |
|
|
| <p>Also check the output of |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git status |
| </pre></div> |
|
|
| <p>to make sure you don’t have untracked files or deletions. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git add [-i|-p|-A] <filenames/dirnames> |
| </pre></div> |
|
|
| <p>Make sure you have told Git your name, email address and GPG key |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git config --global user.name "My Name" |
| git config --global user.email my@email.invalid |
| git config --global user.signingkey ABCDEF0123245 |
| </pre></div> |
|
|
| <p>Enable signing all commits or use -S |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git config --global commit.gpgsign true |
| </pre></div> |
|
|
| <p>Use <samp class="option">--global</samp> to set the global configuration for all your Git checkouts. |
| </p> |
| <p>Git will select the changes to the files for commit. Optionally you can use |
| the interactive or the patch mode to select hunk by hunk what should be |
| added to the commit. |
| </p> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git commit |
| </pre></div> |
|
|
| <p>Git will commit the selected changes to your current local branch. |
| </p> |
| <p>You will be prompted for a log message in an editor, which is either |
| set in your personal configuration file through |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git config --global core.editor |
| </pre></div> |
|
|
| <p>or set by one of the following environment variables: |
| <var class="var">GIT_EDITOR</var>, <var class="var">VISUAL</var> or <var class="var">EDITOR</var>. |
| </p> |
| <a name="Writing-a-commit-message"></a> |
| <h3 class="section">2.10 Writing a commit message<span class="pull-right"><a class="anchor hidden-xs" href="#Writing-a-commit-message" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Writing-a-commit-message" aria-hidden="true">TOC</a></span></h3> |
|
|
| <p>Log messages should be concise but descriptive. |
| </p> |
| <p>The first line must contain the context, a colon and a very short |
| summary of what the commit does. Details can be added, if necessary, |
| separated by an empty line. These details should not exceed 60-72 characters |
| per line, except when containing code. |
| </p> |
| <p>Example of a good commit message: |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">avcodec/cbs: add a helper to read extradata within packet side data |
|
|
| Using ff_cbs_read() on the raw buffer will not parse it as extradata, |
| resulting in parsing errors for example when handling ISOBMFF avcC. |
| This helper works around that. |
| </pre></div> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">ptr might be NULL |
| </pre></div> |
|
|
| <p>If the summary on the first line is not enough, in the body of the message, |
| explain why you made a change, what you did will be obvious from the changes |
| themselves most of the time. Saying just "bug fix" or "10l" is bad. Remember |
| that people of varying skill levels look at and educate themselves while |
| reading through your code. Don’t include filenames in log messages except in |
| the context, Git provides that information. |
| </p> |
| <p>If the commit fixes a registered issue, state it in a separate line of the |
| body: <code class="code">Fix Trac ticket #42.</code> |
| </p> |
| <p>The first line will be used to name |
| the patch by <code class="command">git format-patch</code>. |
| </p> |
| <p>Common mistakes for the first line, as seen in <code class="command">git log --oneline</code> |
| include: missing context at the beginning; description of what the code did |
| before the patch; line too long or wrapped to the second line. |
| </p> |
| <a name="Preparing-a-patchset"></a> |
| <h3 class="section">2.11 Preparing a patchset<span class="pull-right"><a class="anchor hidden-xs" href="#Preparing-a-patchset" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Preparing-a-patchset" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git format-patch <commit> [-o directory] |
| </pre></div> |
|
|
| <p>will generate a set of patches for each commit between <var class="var"><commit></var> and |
| current <var class="var">HEAD</var>. E.g. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git format-patch origin/master |
| </pre></div> |
|
|
| <p>will generate patches for all commits on current branch which are not |
| present in upstream. |
| A useful shortcut is also |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git format-patch -n |
| </pre></div> |
|
|
| <p>which will generate patches from last <var class="var">n</var> commits. |
| By default the patches are created in the current directory. |
| </p> |
| <a name="Sending-patches-for-review"></a> |
| <h3 class="section">2.12 Sending patches for review<span class="pull-right"><a class="anchor hidden-xs" href="#Sending-patches-for-review" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Sending-patches-for-review" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git send-email <commit list|directory> |
| </pre></div> |
|
|
| <p>will send the patches created by <code class="command">git format-patch</code> or directly |
| generates them. All the email fields can be configured in the global/local |
| configuration or overridden by command line. |
| Note that this tool must often be installed separately (e.g. <var class="var">git-email</var> |
| package on Debian-based distros). |
| </p> |
|
|
| <a name="Renaming_002fmoving_002fcopying-files-or-contents-of-files"></a> |
| <h3 class="section">2.13 Renaming/moving/copying files or contents of files<span class="pull-right"><a class="anchor hidden-xs" href="#Renaming_002fmoving_002fcopying-files-or-contents-of-files" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Renaming_002fmoving_002fcopying-files-or-contents-of-files" aria-hidden="true">TOC</a></span></h3> |
|
|
| <p>Git automatically tracks such changes, making those normal commits. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">mv/cp path/file otherpath/otherfile |
| git add [-A] . |
| git commit |
| </pre></div> |
|
|
|
|
| <a name="Git-configuration"></a> |
| <h2 class="chapter">3 Git configuration<span class="pull-right"><a class="anchor hidden-xs" href="#Git-configuration" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Git-configuration" aria-hidden="true">TOC</a></span></h2> |
|
|
| <p>In order to simplify a few workflows, it is advisable to configure both |
| your personal Git installation and your local FFmpeg repository. |
| </p> |
| <a name="Personal-Git-installation"></a> |
| <h3 class="section">3.1 Personal Git installation<span class="pull-right"><a class="anchor hidden-xs" href="#Personal-Git-installation" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Personal-Git-installation" aria-hidden="true">TOC</a></span></h3> |
|
|
| <p>Add the following to your <samp class="file">~/.gitconfig</samp> to help <code class="command">git send-email</code> |
| and <code class="command">git format-patch</code> detect renames: |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">[diff] |
| renames = copy |
| </pre></div> |
|
|
| <a name="Repository-configuration"></a> |
| <h3 class="section">3.2 Repository configuration<span class="pull-right"><a class="anchor hidden-xs" href="#Repository-configuration" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Repository-configuration" aria-hidden="true">TOC</a></span></h3> |
|
|
| <p>In order to have <code class="command">git send-email</code> automatically send patches |
| to the ffmpeg-devel mailing list, add the following stanza |
| to <samp class="file">/path/to/ffmpeg/repository/.git/config</samp>: |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">[sendemail] |
| to = ffmpeg-devel@ffmpeg.org |
| </pre></div> |
|
|
| <a name="FFmpeg-specific"></a> |
| <h2 class="chapter">4 FFmpeg specific<span class="pull-right"><a class="anchor hidden-xs" href="#FFmpeg-specific" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-FFmpeg-specific" aria-hidden="true">TOC</a></span></h2> |
|
|
| <a name="Reverting-broken-commits"></a> |
| <h3 class="section">4.1 Reverting broken commits<span class="pull-right"><a class="anchor hidden-xs" href="#Reverting-broken-commits" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Reverting-broken-commits" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git reset <commit> |
| </pre></div> |
|
|
| <p><code class="command">git reset</code> will uncommit the changes till <var class="var"><commit></var> rewriting |
| the current branch history. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git commit --amend |
| </pre></div> |
|
|
| <p>allows one to amend the last commit details quickly. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git rebase -i origin/master |
| </pre></div> |
|
|
| <p>will replay local commits over the main repository allowing to edit, merge |
| or remove some of them in the process. |
| </p> |
| <div class="info"> |
| <p><code class="command">git reset</code>, <code class="command">git commit --amend</code> and <code class="command">git rebase</code> |
| rewrite history, so you should use them ONLY on your local or topic branches. |
| The main repository will reject those changes. |
| </p></div> |
| <div class="example"> |
| <pre class="example-preformatted">git revert <commit> |
| </pre></div> |
|
|
| <p><code class="command">git revert</code> will generate a revert commit. This will not make the |
| faulty commit disappear from the history. |
| </p> |
| <a name="Pushing-changes-to-remote-trees"></a> |
| <h3 class="section">4.2 Pushing changes to remote trees<span class="pull-right"><a class="anchor hidden-xs" href="#Pushing-changes-to-remote-trees" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Pushing-changes-to-remote-trees" aria-hidden="true">TOC</a></span></h3> |
|
|
| <div class="example"> |
| <pre class="example-preformatted">git push origin master --dry-run |
| </pre></div> |
|
|
| <p>Will simulate a push of the local master branch to the default remote |
| (<var class="var">origin</var>). And list which branches and ranges or commits would have been |
| pushed. |
| Git will prevent you from pushing changes if the local and remote trees are |
| out of sync. Refer to <a class="ref" href="#Updating-the-source-tree-to-the-latest-revision">Updating the source tree to the latest revision</a>. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git remote add <name> <url> |
| </pre></div> |
|
|
| <p>Will add additional remote with a name reference, it is useful if you want |
| to push your local branch for review on a remote host. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git push <remote> <refspec> |
| </pre></div> |
|
|
| <p>Will push the changes to the <var class="var"><remote></var> repository. |
| Omitting <var class="var"><refspec></var> makes <code class="command">git push</code> update all the remote |
| branches matching the local ones. |
| </p> |
| <a name="Finding-a-specific-svn-revision"></a> |
| <h3 class="section">4.3 Finding a specific svn revision<span class="pull-right"><a class="anchor hidden-xs" href="#Finding-a-specific-svn-revision" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Finding-a-specific-svn-revision" aria-hidden="true">TOC</a></span></h3> |
|
|
| <p>Since version 1.7.1 Git supports ‘<samp class="samp">:/foo</samp>’ syntax for specifying commits |
| based on a regular expression. see man gitrevisions |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git show :/'as revision 23456' |
| </pre></div> |
|
|
| <p>will show the svn changeset ‘<samp class="samp">r23456</samp>’. With older Git versions searching in |
| the <code class="command">git log</code> output is the easiest option (especially if a pager with |
| search capabilities is used). |
| </p> |
| <p>This commit can be checked out with |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git checkout -b svn_23456 :/'as revision 23456' |
| </pre></div> |
|
|
| <p>or for Git < 1.7.1 with |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">git checkout -b svn_23456 $SHA1 |
| </pre></div> |
|
|
| <p>where <var class="var">$SHA1</var> is the commit hash from the <code class="command">git log</code> output. |
| </p> |
|
|
| <a name="gpg-key-generation"></a> |
| <h2 class="chapter">5 gpg key generation<span class="pull-right"><a class="anchor hidden-xs" href="#gpg-key-generation" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-gpg-key-generation" aria-hidden="true">TOC</a></span></h2> |
|
|
| <p>If you have no gpg key yet, we recommend that you create a ed25519 based key as it |
| is small, fast and secure. Especially it results in small signatures in git. |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">gpg --default-new-key-algo "ed25519/cert,sign+cv25519/encr" --quick-generate-key "human@server.com" |
| </pre></div> |
|
|
| <p>When generating a key, make sure the email specified matches the email used in git as some sites like |
| github consider mismatches a reason to declare such commits unverified. After generating a key you |
| can add it to the MAINTAINER file and upload it to a keyserver. |
| </p> |
| <a name="Pre_002dpush-checklist"></a> |
| <h2 class="chapter">6 Pre-push checklist<span class="pull-right"><a class="anchor hidden-xs" href="#Pre_002dpush-checklist" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Pre_002dpush-checklist" aria-hidden="true">TOC</a></span></h2> |
|
|
| <p>Once you have a set of commits that you feel are ready for pushing, |
| work through the following checklist to doublecheck everything is in |
| proper order. This list tries to be exhaustive. In case you are just |
| pushing a typo in a comment, some of the steps may be unnecessary. |
| Apply your common sense, but if in doubt, err on the side of caution. |
| </p> |
| <p>First, make sure that the commits and branches you are going to push |
| match what you want pushed and that nothing is missing, extraneous or |
| wrong. You can see what will be pushed by running the git push command |
| with <samp class="option">--dry-run</samp> first. And then inspecting the commits listed with |
| <code class="command">git log -p 1234567..987654</code>. The <code class="command">git status</code> command |
| may help in finding local changes that have been forgotten to be added. |
| </p> |
| <p>Next let the code pass through a full run of our test suite. |
| </p> |
| <ul class="itemize mark-bullet"> |
| <li><code class="command">make distclean</code> |
| </li><li><code class="command">/path/to/ffmpeg/configure</code> |
| </li><li><code class="command">make fate</code> |
| </li><li>if fate fails due to missing samples run <code class="command">make fate-rsync</code> and retry |
| </li></ul> |
|
|
| <p>Make sure all your changes have been checked before pushing them, the |
| test suite only checks against regressions and that only to some extend. It does |
| obviously not check newly added features/code to be working unless you have |
| added a test for that (which is recommended). |
| </p> |
| <p>Also note that every single commit should pass the test suite, not just |
| the result of a series of patches. |
| </p> |
| <p>Once everything passed, push the changes to your public ffmpeg clone and post a |
| merge request to ffmpeg-devel. You can also push them directly but this is not |
| recommended. |
| </p> |
| <a name="Server-Issues"></a> |
| <h2 class="chapter">7 Server Issues<span class="pull-right"><a class="anchor hidden-xs" href="#Server-Issues" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Server-Issues" aria-hidden="true">TOC</a></span></h2> |
|
|
| <p>Contact the project admins at <a class="email" href="mailto:root@ffmpeg.org">root@ffmpeg.org</a> if you have technical |
| problems with the Git server. |
| </p> <p style="font-size: small;"> |
| This document was generated using <a class="uref" href="https://www.gnu.org/software/texinfo/"><em class="emph">makeinfo</em></a>. |
| </p> |
| </div> |
| </body> |
| </html> |
|
|
