Add sas devshell

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/shells/sas/default.nix

@@ -0,0 +1,28 @@
+{ pkgs, ... }:
+pkgs.mkShell {
+  packages = with pkgs; [
+    go
+    gopls
+    go-tools
+    golangci-lint
+    golangci-lint-langserver
+    jdk17
+  ];
+
+  shellHook = ''
+    if git rev-parse --is-inside-work-tree &> /dev/null; then
+      TOP="$(git rev-parse --show-toplevel)"
+      if ! grep -q "^\.go$" "$TOP/.gitignore" "$TOP/.git/info/exclude"; then echo ".go" >> "$TOP/.git/info/exclude"; fi
+      if ! grep -q "^\.gradle$" "$TOP/.gitignore" "$TOP/.git/info/exclude"; then echo ".gradle" >> "$TOP/.git/info/exclude"; fi
+    else
+      TOP="$(pwd)"
+    fi
+
+    export GOPATH="$TOP/.go"
+    export GOPROXY=goproxy.unx.sas.com
+    export GONOSUMDB=*.sas.com,sassoftware.io
+    export JAVA_HOME="${pkgs.jdk17.home}"
+    export GRADLE_USER_HOME="$TOP/.gradle"
+    mkdir -p "$GRADLE_USER_HOME" && cp -f ~/.gradle/gradle.properties "$GRADLE_USER_HOME/gradle.properties"
+  '';
+}