X-Git-Url: http://git.hcoop.net/ntk/apt.git/blobdiff_plain/4010ee76cb1a771d57f1339df725e962df23900e..48fd4181ad0261d5f3e8894dcbfccfaea1530645:/doc/external-dependency-solver-protocol.txt diff --git a/doc/external-dependency-solver-protocol.txt b/doc/external-dependency-solver-protocol.txt index eb783212..14e9528c 100644 --- a/doc/external-dependency-solver-protocol.txt +++ b/doc/external-dependency-solver-protocol.txt @@ -9,8 +9,8 @@ External Dependency Solver Protocol". In the following we use the term **architecture qualified package name** (or *arch-qualified package names* for short) to refer to package -identifiers of the form "arch:package" where "arch" is a dpkg -architecture and "package" a dpkg package name. +identifiers of the form "package:arch" where "package" is a package name +and "arch" a dpkg architecture. ## Components @@ -70,6 +70,7 @@ configuration documentation for more, and more up to date, information. - **Dir::Bin::Solvers**: absolute path of the directory where to look for external solvers. Defaults to `/usr/lib/apt/solvers`. + ## Protocol When configured to use an external solver, APT will resort to it to @@ -209,7 +210,7 @@ field. The following fields are supported in package stanzas: - **APT-Candidate:** (optional, defaults to `no`). Allowed values: `yes`, `no`. When set to `yes`, the corresponding package is the APT candidate for installation among all available packages with the same - name and with the same architecture. + name and architecture. - **APT-Automatic:** (optional, defaults to `no`). Allowed values: `yes`, `no`. When set to `yes`, the corresponding package is marked by @@ -226,6 +227,7 @@ field. The following fields are supported in package stanzas: Release file entry (Origin, Label, Codename, etc.) in the format of APT_PREFERENCES(5). + ### Answer An answer from the external solver to APT is either a *solution* or an @@ -234,11 +236,11 @@ An answer from the external solver to APT is either a *solution* or an The following invariant on **exit codes** must hold true. When the external solver is *able to find a solution*, it will write the solution to standard output and then exit with an exit code of 0. When the -external solver is *unable to find a solution* (and s aware of that), it -will write an error to standard output and then exit with an exit code -of 0. An exit code other than 0 will be interpreted as a solver crash -with no meaningful error about dependency resolution to convey to the -user. +external solver is *unable to find a solution* (and is aware of that), +it will write an error to standard output and then exit with an exit +code of 0. An exit code other than 0 will be interpreted as a solver +crash with no meaningful error about dependency resolution to convey to +the user. #### Solution