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This permits manifest authors to suggest a number of parallel fetch operations against a remote server. For example, Gerrit Code Review servers support queuing of requests and processes them in first-in, first-out order. Running concurrent fetches can utilize multiple CPUs on the Gerrit server, but will also decrease overall operation latency by having the request put into the queue ready to execute as soon as a CPU is free. Change-Id: I3d3904acb6f63516bae4b071c510ad57a2afab18 Signed-off-by: Shawn O. Pearce <sop@google.com>
193 lines
6.3 KiB
Plaintext
193 lines
6.3 KiB
Plaintext
repo Manifest Format
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====================
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A repo manifest describes the structure of a repo client; that is
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the directories that are visible and where they should be obtained
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from with git.
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The basic structure of a manifest is a bare Git repository holding
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a single 'default.xml' XML file in the top level directory.
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Manifests are inherently version controlled, since they are kept
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within a Git repository. Updates to manifests are automatically
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obtained by clients during `repo sync`.
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XML File Format
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---------------
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A manifest XML file (e.g. 'default.xml') roughly conforms to the
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following DTD:
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<!DOCTYPE manifest [
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<!ELEMENT manifest (notice?,
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remote*,
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default?,
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manifest-server?,
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remove-project*,
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project*,
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repo-hooks?)>
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<!ELEMENT notice (#PCDATA)>
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<!ELEMENT remote (EMPTY)>
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<!ATTLIST remote name ID #REQUIRED>
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<!ATTLIST remote fetch CDATA #REQUIRED>
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<!ATTLIST remote review CDATA #IMPLIED>
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<!ELEMENT default (EMPTY)>
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<!ATTLIST default remote IDREF #IMPLIED>
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<!ATTLIST default revision CDATA #IMPLIED>
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<!ATTLIST default sync-j CDATA #IMPLIED>
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<!ELEMENT manifest-server (EMPTY)>
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<!ATTLIST url CDATA #REQUIRED>
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<!ELEMENT project (EMPTY)>
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<!ATTLIST project name CDATA #REQUIRED>
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<!ATTLIST project path CDATA #IMPLIED>
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<!ATTLIST project remote IDREF #IMPLIED>
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<!ATTLIST project revision CDATA #IMPLIED>
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<!ELEMENT remove-project (EMPTY)>
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<!ATTLIST remove-project name CDATA #REQUIRED>
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<!ELEMENT repo-hooks (EMPTY)>
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<!ATTLIST repo-hooks in-project CDATA #REQUIRED>
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<!ATTLIST repo-hooks enabled-list CDATA #REQUIRED>
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]>
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A description of the elements and their attributes follows.
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Element manifest
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----------------
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The root element of the file.
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Element remote
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--------------
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One or more remote elements may be specified. Each remote element
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specifies a Git URL shared by one or more projects and (optionally)
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the Gerrit review server those projects upload changes through.
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Attribute `name`: A short name unique to this manifest file. The
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name specified here is used as the remote name in each project's
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.git/config, and is therefore automatically available to commands
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like `git fetch`, `git remote`, `git pull` and `git push`.
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Attribute `fetch`: The Git URL prefix for all projects which use
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this remote. Each project's name is appended to this prefix to
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form the actual URL used to clone the project.
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Attribute `review`: Hostname of the Gerrit server where reviews
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are uploaded to by `repo upload`. This attribute is optional;
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if not specified then `repo upload` will not function.
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Element default
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---------------
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At most one default element may be specified. Its remote and
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revision attributes are used when a project element does not
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specify its own remote or revision attribute.
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Attribute `remote`: Name of a previously defined remote element.
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Project elements lacking a remote attribute of their own will use
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this remote.
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Attribute `revision`: Name of a Git branch (e.g. `master` or
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`refs/heads/master`). Project elements lacking their own
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revision attribute will use this revision.
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Element manifest-server
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-----------------------
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At most one manifest-server may be specified. The url attribute
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is used to specify the URL of a manifest server, which is an
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XML RPC service that will return a manifest in which each project
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is pegged to a known good revision for the current branch and
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target.
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The manifest server should implement:
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GetApprovedManifest(branch, target)
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The target to use is defined by environment variables TARGET_PRODUCT
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and TARGET_BUILD_VARIANT. These variables are used to create a string
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of the form $TARGET_PRODUCT-$TARGET_BUILD_VARIANT, e.g. passion-userdebug.
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If one of those variables or both are not present, the program will call
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GetApprovedManifest without the target paramater and the manifest server
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should choose a reasonable default target.
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Element project
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---------------
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One or more project elements may be specified. Each element
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describes a single Git repository to be cloned into the repo
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client workspace.
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Attribute `name`: A unique name for this project. The project's
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name is appended onto its remote's fetch URL to generate the actual
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URL to configure the Git remote with. The URL gets formed as:
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${remote_fetch}/${project_name}.git
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where ${remote_fetch} is the remote's fetch attribute and
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${project_name} is the project's name attribute. The suffix ".git"
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is always appended as repo assumes the upstream is a forrest of
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bare Git repositories.
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The project name must match the name Gerrit knows, if Gerrit is
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being used for code reviews.
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Attribute `path`: An optional path relative to the top directory
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of the repo client where the Git working directory for this project
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should be placed. If not supplied the project name is used.
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Attribute `remote`: Name of a previously defined remote element.
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If not supplied the remote given by the default element is used.
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Attribute `revision`: Name of the Git branch the manifest wants
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to track for this project. Names can be relative to refs/heads
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(e.g. just "master") or absolute (e.g. "refs/heads/master").
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Tags and/or explicit SHA-1s should work in theory, but have not
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been extensively tested. If not supplied the revision given by
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the default element is used.
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Element remove-project
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----------------------
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Deletes the named project from the internal manifest table, possibly
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allowing a subsequent project element in the same manifest file to
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replace the project with a different source.
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This element is mostly useful in the local_manifest.xml, where
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the user can remove a project, and possibly replace it with their
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own definition.
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Local Manifest
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==============
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Additional remotes and projects may be added through a local
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manifest, stored in `$TOP_DIR/.repo/local_manifest.xml`.
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For example:
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$ cat .repo/local_manifest.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<manifest>
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<project path="manifest"
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name="tools/manifest" />
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<project path="platform-manifest"
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name="platform/manifest" />
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</manifest>
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Users may add projects to the local manifest prior to a `repo sync`
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invocation, instructing repo to automatically download and manage
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these extra projects.
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