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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/guix.texi | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 1ae5711c02..4593d793b4 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -5409,6 +5409,27 @@ automatically corrected. @end table @end deftp +@deffn {Scheme Syntax} this-package +When used in the @emph{lexical scope} of a package field definition, this +identifier resolves to the package being defined. + +The example below shows how to add a package as a native input of itself when +cross-compiling: + +@example +(package + (name "guile") + ;; ... + + ;; When cross-compiled, Guile, for example, depends on + ;; a native version of itself. Add it here. + (native-inputs (if (%current-target-system) + `(("self" ,this-package)) + '()))) +@end example + +It is an error to refer to @code{this-package} outside a package definition. +@end deffn @node origin Reference @subsection @code{origin} Reference @@ -10592,6 +10613,27 @@ is that only @code{root} and members of the @code{wheel} group may use @code{sudo}. @end table + +@deffn {Scheme Syntax} this-operating-system +When used in the @emph{lexical scope} of an operating system field definition, +this identifier resolves to the operating system being defined. + +The example below shows how to refer to the operating system being defined in +the definition of the @code{label} field: + +@example +(use-modules (gnu) (guix)) + +(operating-system + ;; ... + (label (package-full-name + (operating-system-kernel this-operating-system)))) +@end example + +It is an error to refer to @code{this-operating-system} outside an operating +system definition. +@end deffn + @end deftp @node File Systems |