From 1340d1d2e887c9473b71d4068631da0016594047 Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Date: Wed, 2 Dec 2020 11:58:00 +0100
Subject: [PATCH] develop: Experimental interactive support

---
 garlic/develop.nix | 50 ++++++++++++++++++++++++++++++++++++++++++++++
 overlay.nix        | 28 +++++++++++++++++++++++++-
 2 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 garlic/develop.nix

diff --git a/garlic/develop.nix b/garlic/develop.nix
new file mode 100644
index 0000000..555666c
--- /dev/null
+++ b/garlic/develop.nix
@@ -0,0 +1,50 @@
+{
+  stdenv
+, bash
+, bashInteractive
+, busybox
+, extraInputs  ? []
+}:
+
+stdenv.mkDerivation {
+  name = "develop";
+  preferLocalBuild = true;
+  phases = [ "installPhase" ];
+  buildInputs = extraInputs ++ [ busybox ];
+  installPhase = ''
+    cat > $out <<EOF
+    #!${bash}/bin/bash
+
+    # This program loads a environment with the given programs available.
+    # Requires /nix to be available.
+
+    export "buildInputs=$buildInputs"
+    # ${stdenv}
+    export "PATH=$PATH"
+    export "TERM=linux"
+    export "out=/fake-output-directory"
+    export NIX_BUILD_TOP=.
+    export NIX_STORE=/nix/store
+    export PS1='\033[1;32mdevelop\$\033[0m '
+    #export PS1='\[\033[1;32m\]develop\$\[\033[0m\] '
+
+    export TMUX_TMPDIR=/tmp
+    export TMPDIR=/tmp
+    export TEMPDIR=/tmp
+    export TMP=/tmp
+    export TEMP=/tmp
+
+    export LANG=en_US.UTF-8
+    export TERM=linux
+
+    source ${stdenv}/setup
+
+    if [[ -z "\$@" ]]; then
+      exec ${bashInteractive}/bin/bash
+    else
+      exec "\$@"
+    fi
+    EOF
+    chmod +x $out
+  '';
+}
diff --git a/overlay.nix b/overlay.nix
index a2bfc59..a86077e 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -184,8 +184,34 @@ let
     # Aliases bsc.apps -> bsc.garlic.apps
     inherit (bsc.garlic) apps fig exp ds;
 
+    # TODO: move into garlic/default.nix
     garlic = {
-      # TODO: move into garlic/default.nix
+
+      unsafeDevelop = callPackage ./garlic/develop.nix {
+            extraInputs = with self; [
+              coreutils htop procps-ng vim which strace
+              tmux gdb kakoune universal-ctags bashInteractive
+              glibcLocales ncurses
+              # Add more nixpkgs packages here...
+              bsc.slurm bsc.clangOmpss2 bsc.icc bsc.mcxx bsc.perf
+              # Add more bscpkgs packages here...
+            ];
+      };
+
+      develop = bsc.garlic.stages.exec {
+        nextStage = bsc.garlic.stages.isolate {
+          nextStage = bsc.garlic.unsafeDevelop;
+          nixPrefix = bsc.garlic.targetMachine.config.nixPrefix;
+          extraMounts = [ "/tmp:$TMPDIR" ];
+        };
+        nixPrefix = bsc.garlic.targetMachine.config.nixPrefix;
+        # This hack uploads all dependencies to MN4
+        pre = ''
+          # Hack to upload this to MN4: @upload-to-mn@
+          # Run the following command in a normal interactive shell (outside nix)
+        '';
+        post = "\n";
+      };
 
       # Configuration for the machines
       machines = callPackage ./garlic/machines.nix { };