diff options
Diffstat (limited to 'guix/search-paths.scm')
| -rw-r--r-- | guix/search-paths.scm | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/guix/search-paths.scm b/guix/search-paths.scm index b17f5acd5d..7957c88241 100644 --- a/guix/search-paths.scm +++ b/guix/search-paths.scm @@ -33,7 +33,8 @@ search-path-specification->sexp sexp->search-path-specification - evaluate-search-paths)) + evaluate-search-paths + environment-variable-definition)) ;;; Commentary: ;;; @@ -144,4 +145,26 @@ current settings and report only settings not already effective." (filter-map search-path-definition search-paths)) +(define* (environment-variable-definition variable value + #:key + (kind 'exact) + (separator ":")) + "Return a the definition of VARIABLE to VALUE in Bash syntax: + +KIND can be either 'exact (return the definition of VARIABLE=VALUE), +'prefix (return the definition where VALUE is added as a prefix to VARIABLE's +current value), or 'suffix (return the definition where VALUE is added as a +suffix to VARIABLE's current value.) In the case of 'prefix and 'suffix, +SEPARATOR is used as the separator between VARIABLE's current value and its +prefix/suffix." + (match kind + ('exact + (format #f "export ~a=\"~a\"" variable value)) + ('prefix + (format #f "export ~a=\"~a${~a:+~a}$~a\"" + variable value variable separator variable)) + ('suffix + (format #f "export ~a=\"$~a${~a:+~a}~a\"" + variable variable variable separator value)))) + ;;; search-paths.scm ends here |