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Platform Team/Package Management System (view source)
Revision as of 13:36, 4 September 2011
, 13:36, 4 September 2011→Dictionary: restructured to enable section linking, like Platform Team/Sweets#recipe
A list of terms to understand the basic concepts of ''Sweets''.
A list of terms to understand the basic concepts of ''Sweets''.
=====Zero Install, 0install=====
:Decentralized cross-distribution software installation system that ''Sweets'' is based on.
:Decentralized cross-distribution software installation system that ''Sweets'' is based on.
=====Sweets=====
:Package management wrapper around ''Zero Install''.
:Package management wrapper around ''Zero Install''.
=====sweet, sweet project=====
:Distribution entities in ''Sweets'', i.e., packages. In other words, software projects that have ''recipe'' files in their sources that are being released via ''Sweets''.
:Distribution entities in ''Sweets'', i.e., packages. In other words, software projects that have ''recipe'' files in their sources that are being released via ''Sweets''.
=====feed=====
:A file in [http://0install.net/interface-spec.html XML notation] that contains information about all possible variants of the software, i.e., ''implementations'', that can be launched.
:A file in [http://0install.net/interface-spec.html XML notation] that contains information about all possible variants of the software, i.e., ''implementations'', that can be launched.
=====interface=====
:This is the cornerstone of ''Zero Install'' and, thus, ''Sweets'', as well. To make a ''feed'' useful for other people, they are placed somewhere on the Internet to be accessible via HTTP/FTP ([[Platform_Team/Infrastructure|http://sweets.sugarlabs.org]] for the ''Sweets'' case). The full Web url, such as http://0install.net/2006/interfaces/ZeroInstall-GUI.xml, is a unique identifier of a distribution entity within ''Zero Install''/''Sweets''. This powerful identifier is named the ''interface''.
:This is the cornerstone of ''Zero Install'' and, thus, ''Sweets'', as well. To make a ''feed'' useful for other people, they are placed somewhere on the Internet to be accessible via HTTP/FTP ([[Platform_Team/Infrastructure|http://sweets.sugarlabs.org]] for the ''Sweets'' case). The full Web url, such as http://0install.net/2006/interfaces/ZeroInstall-GUI.xml, is a unique identifier of a distribution entity within ''Zero Install''/''Sweets''. This powerful identifier is named the ''interface''.
:This url is all that is needed to run software from everywhere there is a connection to the Internet.
:This url is all that is needed to run software from everywhere there is a connection to the Internet.
=====implementation=====
:One or several bundles that contain one particular implementation of software projects that are being distributed via ''Zero Install''. ''Implementations'' are [[Platform_Team/Recipe_Specification|attributed]] with versions, stability levels, targeted machine architectures, and OS types. It is possible to have several implementations for the same software version if there are differences between launching them on different OSes or machine architectures. Another important attribute of ''implementations'' are dependencies of this particular ''implementation'', formed as a list of ''interfaces''. ''Feeds'' contain information about all existing implementations in order to let ''Zero Install'' choose the right one on the client side, taking into account tons of details, like machine architecture, OS type, stability levels, or dependency restrictions.
:One or several bundles that contain one particular implementation of software projects that are being distributed via ''Zero Install''. ''Implementations'' are [[Platform_Team/Recipe_Specification|attributed]] with versions, stability levels, targeted machine architectures, and OS types. It is possible to have several implementations for the same software version if there are differences between launching them on different OSes or machine architectures. Another important attribute of ''implementations'' are dependencies of this particular ''implementation'', formed as a list of ''interfaces''. ''Feeds'' contain information about all existing implementations in order to let ''Zero Install'' choose the right one on the client side, taking into account tons of details, like machine architecture, OS type, stability levels, or dependency restrictions.
=====recipe=====
:On the ''Zero Install'' level, developers work with ''feeds'' manually. In the ''Sweets'' case, the regular way is to [[Platform_Team/Recipe_Specification|use ''recipes'']] (but it is still possible to fallback to using ''feeds'' at any time). In short, it is an analog of spec files in GNU/Linux distributions, e.g., RPM {{Code|.spec}} files or {{Code|debian/}} directories in Debian. ''Recipes'' do not specify ready-to-launch ''implementations'' like ''feeds'' do, but rather, only describe the lastest software version. The ''feed'' will be generated automatically on [[Platform_Team/Infrastructure|a server]] (along with preserving the history of versions) after [[Platform_Team/Guide/Sweets_Packaging|releasing]] a new version of the software.
:On the ''Zero Install'' level, developers work with ''feeds'' manually. In the ''Sweets'' case, the regular way is to [[Platform_Team/Recipe_Specification|use ''recipes'']] (but it is still possible to fallback to using ''feeds'' at any time). In short, it is an analog of spec files in GNU/Linux distributions, e.g., RPM {{Code|.spec}} files or {{Code|debian/}} directories in Debian. ''Recipes'' do not specify ready-to-launch ''implementations'' like ''feeds'' do, but rather, only describe the lastest software version. The ''feed'' will be generated automatically on [[Platform_Team/Infrastructure|a server]] (along with preserving the history of versions) after [[Platform_Team/Guide/Sweets_Packaging|releasing]] a new version of the software.
=====Short form for sweet interfaces=====
:Within ''Sweets'', it is possible to omit the {{Code|http://sweets.sugarlabs.org/}} prefix for sweet ''interfaces'' so as to make usage more expressive, e.g., in ''recipe'' files. It is always possible to use the full ''interfaces''.
:Within ''Sweets'', it is possible to omit the {{Code|http://sweets.sugarlabs.org/}} prefix for sweet ''interfaces'' so as to make usage more expressive, e.g., in ''recipe'' files. It is always possible to use the full ''interfaces''.
=====Implemented interfaces=====
:One particular ''sweet'' implements one or several ''interfaces'' [[Platform_Team/Recipe_Specification#Common_options|according]] to its ''recipe'' files. The reason for having several ''interfaces'' is that the same ''sweet'' might represent itself, e.g., http://sweets.sugarlabs.org/~alsroot/browse, and the upstream ''sweet'' that was used as a basis for the current one, e.g., http://sweets.sugarlabs.org/browse. Furthermore, on the client side, it will be possible to get implementations from {{Code|~alsroot/browse}} while launching {{Code|browse}} ''sweet''.
:One particular ''sweet'' implements one or several ''interfaces'' [[Platform_Team/Recipe_Specification#Common_options|according]] to its ''recipe'' files. The reason for having several ''interfaces'' is that the same ''sweet'' might represent itself, e.g., http://sweets.sugarlabs.org/~alsroot/browse, and the upstream ''sweet'' that was used as a basis for the current one, e.g., http://sweets.sugarlabs.org/browse. Furthermore, on the client side, it will be possible to get implementations from {{Code|~alsroot/browse}} while launching {{Code|browse}} ''sweet''.
=====Associated interfaces=====
:''Associated interfaces'' is the alternate way to setup upstream-downstream relations between ''interfaces''. If a ''recipe'' file [[Platform_Team/Recipe_Specification#Common_options|mentions]] some ''interfaces'' as ''associated'', ''implementations'' from these interfaces will be added to the ''implementations'' list of the current one. For example, if the http://sweets.sugarlabs.org/sdk/sugar ''interface'' (the pure ''sweet'' Sugar Shell) contains http://sweets.sugarlabs.org/base/sugar (an alias to the natively packaged Sugar Shell) as an ''associated interface'', it will be possible while launching {{Code|sdk/sugar}}, to run natively packaged sugar that came from {{Code|base/sugar}}.
:''Associated interfaces'' is the alternate way to setup upstream-downstream relations between ''interfaces''. If a ''recipe'' file [[Platform_Team/Recipe_Specification#Common_options|mentions]] some ''interfaces'' as ''associated'', ''implementations'' from these interfaces will be added to the ''implementations'' list of the current one. For example, if the http://sweets.sugarlabs.org/sdk/sugar ''interface'' (the pure ''sweet'' Sugar Shell) contains http://sweets.sugarlabs.org/base/sugar (an alias to the natively packaged Sugar Shell) as an ''associated interface'', it will be possible while launching {{Code|sdk/sugar}}, to run natively packaged sugar that came from {{Code|base/sugar}}.
=====local sweet=====
:It is an important high-level concept in ''Sweets'', which is intended to make the development process of ''sweet'' projects more comfortable. Technically, it is the source software of the ''sweet'' project (i.e., with a ''recipe'' file) placed somewhere in the file system and registered in the local ''Sweets'' instance as a single ''implementation'' for ''interfaces'' it ''implements''. It is always possible to run this ''local sweet'' directly by using the full filesystem path as an ''interface'', but its most useful feature is reuse of the ''local implementation'' in routine ''Sweets'' workflows. For example, if sugar-toolkit sources were cloned to the {{Code|~/src/sugar-toolkit}} directory, then while running a {{Code|sugar}} ''sweet'', it would become possible to reuse local sugar-toolkit sources as a regular ''implementation''.
:It is an important high-level concept in ''Sweets'', which is intended to make the development process of ''sweet'' projects more comfortable. Technically, it is the source software of the ''sweet'' project (i.e., with a ''recipe'' file) placed somewhere in the file system and registered in the local ''Sweets'' instance as a single ''implementation'' for ''interfaces'' it ''implements''. It is always possible to run this ''local sweet'' directly by using the full filesystem path as an ''interface'', but its most useful feature is reuse of the ''local implementation'' in routine ''Sweets'' workflows. For example, if sugar-toolkit sources were cloned to the {{Code|~/src/sugar-toolkit}} directory, then while running a {{Code|sugar}} ''sweet'', it would become possible to reuse local sugar-toolkit sources as a regular ''implementation''.
=====sweet package=====
:Using the http://packages.sugarlabs.org Web UI, it is possible to create a repository with native packages from released ''sweets''.
:Using the http://packages.sugarlabs.org Web UI, it is possible to create a repository with native packages from released ''sweets''.
=====Sweets Distribution=====
:It is a [http://download.sugarlabs.org/packages/SweetsDistribution:/ repository] with Glucose and Fructose ''sweet packages'' based on {{Code|sdk/}} ''sweets''.
:It is a [http://download.sugarlabs.org/packages/SweetsDistribution:/ repository] with Glucose and Fructose ''sweet packages'' based on {{Code|sdk/}} ''sweets''.