home-manager: add --no-out-link command line option

When this option is used then `home-manager build` will not produce a
`result` link in the current working directory.

doc/man-home-manager.xml

@@ -155,6 +155,10 @@
     --(no-)substitute
    </arg>
 
+   <arg>
+    --no-out-link
+   </arg>
+
    <arg>
     <group choice="req">
     <arg choice="plain">
@@ -536,6 +540,19 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry>
+    <term>
+     <option>--no-out-link</option>
+    </term>
+    <listitem>
+     <para>
+      Passed on to <citerefentry>
+      <refentrytitle>nix-build</refentrytitle>
+      <manvolnum>1</manvolnum> </citerefentry>
+      when running <command>home-manager build</command>.
+     </para>
+    </listitem>
+   </varlistentry>
    <varlistentry>
     <term>
      <option>-v</option>

home-manager/completion.bash

@@ -291,7 +291,8 @@ _home-manager_completions ()
 
     local Options
     Options=( "-f" "--file" "-b" "-A" "-I" "-h" "--help" "-n" "--dry-run" "-v" "--verbose" \
-              "--cores" "--debug" "--keep-failed" "--keep-going" "-j" "--max-jobs" "--no-substitute" "--show-trace" "--substitute")
+              "--cores" "--debug" "--keep-failed" "--keep-going" "-j" "--max-jobs" \
+              "--no-substitute" "--no-out-link" "--show-trace" "--substitute")
 
     # ^ « home-manager »'s options.
 

home-manager/completion.fish

@@ -60,3 +60,4 @@ complete -c home-manager -x -l "option" -d "Set Nix configuration option"
 complete -c home-manager -f -l "show-trace" -d "Print stack trace of evaluation errors"
 complete -c home-manager -f -l "substitute"
 complete -c home-manager -f -l "no-substitute"
+complete -c home-manager -f -l "no-out-link"

home-manager/completion.zsh

@@ -48,6 +48,7 @@ case "$state" in
           '--keep-failed[keep failed]' \
           '--keep-going[keep going]' \
           '--max-jobs[max jobs]:NUM:()' \
+          '--no-out-link[no out link]' \
           '--no-substitute[no substitute]' \
           '--option[option]:NAME VALUE:()' \
           '--show-trace[show trace]' \

home-manager/home-manager

@@ -252,6 +252,7 @@ function doBuild() {
         nix build \
             "${PASSTHROUGH_OPTS[@]}" \
              ${DRY_RUN+--dry-run} \
+             ${NO_OUT_LINK+--no-out-link} \
             "$FLAKE_CONFIG_URI.activationPackage" \
             || exitCode=1
         return $exitCode
@@ -263,8 +264,9 @@ function doBuild() {
     newsInfo=$(buildNews)
 
     local exitCode
-
-    doBuildAttr --attr activationPackage \
+    doBuildAttr \
+                ${NO_OUT_LINK+--no-out-link} \
+                --attr activationPackage \
         && exitCode=0 || exitCode=1
 
     presentNews "$newsInfo"
@@ -520,6 +522,7 @@ function doHelp() {
     echo "  --option NAME VALUE"
     echo "  --show-trace"
     echo "  --(no-)substitute"
+    echo "  --no-out-link            Do not create a symlink to the output path"
     echo
     echo "Commands"
     echo
@@ -601,6 +604,9 @@ while [[ $# -gt 0 ]]; do
             PASSTHROUGH_OPTS+=("$opt" "$1" "$2")
             shift 2
             ;;
+        --no-out-link)
+            NO_OUT_LINK=1
+            ;;
         -h|--help)
             doHelp
             exit 0
@@ -695,3 +701,5 @@ case $COMMAND in
         exit 1
         ;;
 esac
+
+# vim: ft=bash