diff options
| author | Ludovic Courtès <ludo@gnu.org> | 2022-12-26 19:11:27 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2023-01-05 14:20:23 +0100 |
| commit | 73684dc90e013f2f0cca1097b0c944bb9aa88709 (patch) | |
| tree | 4fddd86a52031d96cbb8fb2716f87e97f1507470 /doc | |
| parent | 2c757e8fb4385f889ec91f02b77acdf27143c316 (diff) | |
home: services: environment-variables: Add support for literal strings.
* gnu/home/services.scm (<literal-string>): New record type.
(environment-variable-shell-definitions): Split 'shell-quote' into
'quote-string' and 'shell-double-quote'. Add 'shell-single-quote'.
Add clause for 'literal-string' records.
* tests/guix-home.sh: Test it.
* doc/guix.texi (Essential Home Services): Document it.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/guix.texi | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 96b4675a01..32e34b7d52 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -41007,13 +41007,15 @@ The easiest way to extend a service type, without defining a new service type is to use the @code{simple-service} helper from @code{(gnu services)}. +@findex literal-string @lisp (simple-service 'some-useful-env-vars-service home-environment-variables-service-type `(("LESSHISTFILE" . "$XDG_CACHE_HOME/.lesshst") ("SHELL" . ,(file-append zsh "/bin/zsh")) ("USELESS_VAR" . #f) - ("_JAVA_AWT_WM_NONREPARENTING" . #t))) + ("_JAVA_AWT_WM_NONREPARENTING" . #t) + ("LITERAL_VALUE" . ,(literal-string "$@{abc@}")))) @end lisp If you include such a service in you home environment definition, it @@ -41021,11 +41023,17 @@ will add the following content to the @file{setup-environment} script (which is expected to be sourced by the login shell): @example -export LESSHISTFILE=$XDG_CACHE_HOME/.lesshst -export SHELL=/gnu/store/2hsg15n644f0glrcbkb1kqknmmqdar03-zsh-5.8/bin/zsh +export LESSHISTFILE="$XDG_CACHE_HOME/.lesshst" +export SHELL="/gnu/store/2hsg15n644f0glrcbkb1kqknmmqdar03-zsh-5.8/bin/zsh" export _JAVA_AWT_WM_NONREPARENTING +export LITERAL_VALUE='$@{abc@}' @end example +Notice that @code{literal-string} above lets us declare that a value is +to be interpreted as a @dfn{literal string}, meaning that ``special +characters'' such as the dollar sign will not be interpreted by the +shell. + @quotation Note Make sure that module @code{(gnu packages shells)} is imported with @code{use-modules} or any other way, this namespace contains the |