add variable NP_LOCATION

README.md

@@ -68,13 +68,14 @@ In case the automatically selected runtime doesn't work, use the follwing enviro
 ### Environmant Variables
 The following environment variables are optional and can be used to override the default behaviour of running nix-portable
 ```
-NP_DEBUG    enable debug logging (to stdout)
-NP_MINIMAL  Do not automatically install git
-NP_RUNTIME  which runtime to use (must be either 'bwrap' or 'proot') 
-NP_BWRAP    specify the path to the bwrap executable
-NP_PROOT    specify the path to the proot executable
-NP_RUN      override the complete command to run nix
-            (to use an unsupported runtime, or for debugging)
-            nix will then be executed like: $NP_RUN {nix-binary} {args...}
+NP_DEBUG      enable debug logging (to stdout)
+NP_MINIMAL    do not automatically install git
+NP_LOCATION   where to put the `.nix-portable` dir. (defaults to `$HOME`)
+NP_RUNTIME    which runtime to use (must be either 'bwrap' or 'proot') 
+NP_BWRAP      specify the path to the bwrap executable
+NP_PROOT      specify the path to the proot executable
+NP_RUN        override the complete command to run nix
+              (to use an unsupported runtime, or for debugging)
+              nix will then be executed like: $NP_RUN {nix-binary} {args...}
           
 ```

default.nix

@@ -51,8 +51,9 @@ let
     debug(){
       [ -n "\$NP_DEBUG" ] && echo \$@ || true
     }
-      
-    dir=\$HOME/.nix-portable
+
+    [ -z "\$NP_LOCATION" ] && NP_LOCATION="\$HOME"
+    dir="\$NP_LOCATION/.nix-portable"
     mkdir -p \$dir/bin
 
 
@@ -67,6 +68,8 @@ let
       elif [ ! -e /etc/ssl/certs ]; then
         debug "/etc/ssl/certs does not exist, using certs from nixpkgs"
         export SSL_CERT_FILE=${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt
+      else
+        debug "certs seem to reside in /etc/ssl/certs. No need to set up anything"
       fi
     fi