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| how_to_use_google_repo [2020/03/25 14:27] – [Initializing a repo repository] rpjday | how_to_use_google_repo [2020/04/21 11:07] (current) – [Commands] rpjday |
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| ===== Overview ===== | ===== Overview ===== |
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| Tutorial on how to use Google ''repo'' tool, using AGL (Automotive Grade Linux) as an example. | This is a tutorial on how to use Google's ''repo'' version control tool, as many people seem to have trouble getting a handle on its proper operation, and most of the documentation doesn't seem all that helpful in terms of clarification. For this tutorial, we'll be using AGL (Automotive Grade Linux) as an example. |
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| Links: | Links for AGL |
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| * [[https://www.automotivelinux.org/|AGL home page]] | * [[https://www.automotivelinux.org/|AGL home page]] |
| * [[https://wiki.automotivelinux.org/start|AGL wiki]] | * [[https://wiki.automotivelinux.org/start|AGL wiki]] |
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| | ===== TO DO ===== |
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| | * Discuss cloning just manifest repo. |
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| | ===== Commands ===== |
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| | ==== repo help ==== |
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| | <code> |
| | abandon Permanently abandon a development branch |
| | branch View current topic branches |
| | branches View current topic branches |
| | checkout Checkout a branch for development |
| | cherry-pick Cherry-pick a change. |
| | diff Show changes between commit and working tree |
| | diffmanifests Manifest diff utility |
| | download Download and checkout a change |
| | gitc-delete Delete a GITC Client. |
| | gitc-init Initialize a GITC Client. |
| | grep Print lines matching a pattern |
| | info Get info on the manifest branch, current branch or unmerged branches |
| | init Initialize repo in the current directory |
| | list List projects and their associated directories |
| | overview Display overview of unmerged project branches |
| | prune Prune (delete) already merged topics |
| | rebase Rebase local branches on upstream branch |
| | smartsync Update working tree to the latest known good revision |
| | stage Stage file(s) for commit |
| | start Start a new branch for development |
| | status Show the working tree status |
| | sync Update working tree to the latest revision |
| | upload Upload changes for code review |
| | </code> |
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| | ===== The two versions of "repo" ===== |
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| | Perhaps the most confusing property of ''repo'' is that there are, conceptually, two types of ''repo'' command. |
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| | The first kind of ''repo'' is not the full command; rather, it is a simplified version called the //tool launcher//; this is the single-executable command you download initially, and make sure is part of your search path so that when you invoke ''repo'', that is the command that is located and executed. It's common to install that in your personal ''~/bin'' directory, which is almost always already part of your search path. |
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| | Once you start working with ''repo'' and start initializing repositories, each and every repository will, as part of being initialized, have installed within it the //full// version of ''repo'', which supports all of the subcommands. However, even as you're working with ''repo'', you always, always, always invoke the initial tool launcher which, as soon as it realizes it's being run in the context of an actual repository, will hand off control to that repo's full version. |
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| | In other words, even though every single ''repo'' repository you initialize gets its own copy of the full version of the command, you should never run that full version directly -- you always invoke the simpler, tool launcher version, which will take it from there. |
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| ===== Installing "repo" launcher tool ===== | ===== Installing "repo" launcher tool ===== |
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| Install the ''repo'' launcher tool in your personal ''~/bin'' directory: | As explained above, install the launcher tool version of ''repo'' in any directory that is on your search path, such as: |
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| <code> | <code> |
| </code> | </code> |
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| Note well that this is not the ''repo'' command itself; rather, it is the //launcher tool// that will, every time you initialize a new repo directory, copy the //actual// ''repo'' command into that new directory. | Once again, this is not the full version of the command; its job is to simply initialize new repositories when you run ''repo init'', then in each of those repositories install the //full// version of the command, which will be used from then on. |
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| Do not confuse these two things; that is a common misunderstanding. | |
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| ===== Initializing a repo repository ===== | ===== Initializing a repo repository ===== |
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| <code> | <code> |
| $ mkdir repo_dir | $ mkdir agl_dir |
| $ cd repo_dir | $ cd agl_dir |
| </code> | </code> |
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