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emacs: fix service environment

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Emacs populates 'exec-path' at launch from the 'PATH' environment
variable. Likewise, the emacs derivation from nixpkgs populates
'load-path' from the 'NIX_PROFILES' variable. As neither of these are
available by default in the systemd user manager, revert to the
previous behavior of launching the Emacs daemon from a login shell.

Fixes #1354
Fixes #1340
PR #1355
This commit is contained in:
Tad Fisher 2020-06-23 17:17:33 -07:00 committed by Robert Helgesson
parent 8f2342e13a
commit 54b69d2ef8
No known key found for this signature in database
GPG key ID: 36BDAA14C2797E89
7 changed files with 30 additions and 9 deletions
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12
modules/services/emacs.nix
View file

@ -97,13 +97,19 @@ in {
};
Service = {
ExecStart = "${emacsBinPath}/emacs --fg-daemon${
# We wrap ExecStart in a login shell so Emacs starts with the user's
# environment, most importantly $PATH and $NIX_PROFILES. It may be
# worth investigating a more targeted approach for user services to
# import the user environment.
ExecStart = ''
${pkgs.runtimeShell} -l -c "${emacsBinPath}/emacs --fg-daemon${
# In case the user sets 'server-directory' or 'server-name' in
# their Emacs config, we want to specify the socket path explicitly
# so launching 'emacs.service' manually doesn't break emacsclient
# when using socket activation.
optionalString cfg.socketActivation.enable ''="${socketPath}"''
}";
optionalString cfg.socketActivation.enable
"=${escapeShellArg socketPath}"
}"'';
# We use '(kill-emacs 0)' to avoid exiting with a failure code, which
# would restart the service immediately.
ExecStop = "${emacsBinPath}/emacsclient --eval '(kill-emacs 0)'";

2
tests/modules/services/emacs/emacs-service-emacs.service
View file

@ -2,7 +2,7 @@
WantedBy=default.target
[Service]
ExecStart=@emacs@/bin/emacs --fg-daemon
ExecStart=@runtimeShell@ -l -c "@emacs@/bin/emacs --fg-daemon"
ExecStop=@emacs@/bin/emacsclient --eval '(kill-emacs 0)'
Restart=on-failure

7
tests/modules/services/emacs/emacs-service.nix
View file

@ -24,7 +24,12 @@ with lib;
assertFileExists home-path/share/applications/emacsclient.desktop
assertFileContent home-files/.config/systemd/user/emacs.service \
${./emacs-service-emacs.service}
${
pkgs.substituteAll {
inherit (pkgs) runtimeShell;
src = ./emacs-service-emacs.service;
}
}
assertFileContent home-path/share/applications/emacsclient.desktop \
${./emacs-emacsclient.desktop}
'';

2
tests/modules/services/emacs/emacs-socket-26-emacs.service
View file

@ -1,5 +1,5 @@
[Service]
ExecStart=@emacs@/bin/emacs --fg-daemon="%T/emacs%U/server"
ExecStart=@runtimeShell@ -l -c "@emacs@/bin/emacs --fg-daemon='%T/emacs%U/server'"
ExecStop=@emacs@/bin/emacsclient --eval '(kill-emacs 0)'
Restart=on-failure

7
tests/modules/services/emacs/emacs-socket-26.nix
View file

@ -27,7 +27,12 @@ with lib;
assertFileContent home-files/.config/systemd/user/emacs.socket \
${./emacs-socket-26-emacs.socket}
assertFileContent home-files/.config/systemd/user/emacs.service \
${./emacs-socket-26-emacs.service}
${
pkgs.substituteAll {
inherit (pkgs) runtimeShell;
src = ./emacs-socket-26-emacs.service;
}
}
assertFileContent home-path/share/applications/emacsclient.desktop \
${./emacs-emacsclient.desktop}
'';

2
tests/modules/services/emacs/emacs-socket-27-emacs.service
View file

@ -1,5 +1,5 @@
[Service]
ExecStart=@emacs@/bin/emacs --fg-daemon="%t/emacs/server"
ExecStart=@runtimeShell@ -l -c "@emacs@/bin/emacs --fg-daemon='%t/emacs/server'"
ExecStop=@emacs@/bin/emacsclient --eval '(kill-emacs 0)'
Restart=on-failure

7
tests/modules/services/emacs/emacs-socket-27.nix
View file

@ -29,7 +29,12 @@ in {
assertFileContent home-files/.config/systemd/user/emacs.socket \
${./emacs-socket-27-emacs.socket}
assertFileContent home-files/.config/systemd/user/emacs.service \
${./emacs-socket-27-emacs.service}
${
pkgs.substituteAll {
inherit (pkgs) runtimeShell;
src = ./emacs-socket-27-emacs.service;
}
}
assertFileContent home-path/share/applications/emacsclient.desktop \
${./emacs-emacsclient.desktop}
'';