feat: add netgen

README.md

@@ -9,6 +9,7 @@ The VM is based on Ubuntu 22.04 and includes the following tools:
 - [Magic](http://opencircuitdesign.com/magic/)
 - [KLayout](https://www.klayout.de/)
 - [Xschem](https://xschem.sourceforge.io/stefan/index.html)
+- [netgen](http://opencircuitdesign.com/netgen/)
 - [Skywater 130nm PDK](https://github.com/google/skywater-pdk)
 
 To download the VM, go to the [actions](https://github.com/TinyTapeout/analog-virtualbox-vm-sky130a/actions) tab and download the latest "tt_analog_virtualbox_ova" artifact. Import the OVA file into VirtualBox and start the VM.

image.pkr.hcl

@@ -64,10 +64,12 @@ build {
       PDK_ROOT        = "/home/ttuser/pdk"
       PDK_VERSION     = "bdc9412b3e468c102d01b7cf6337be06ec6e9c9a"
       MAGIC_VERSION   = "8.3.460"
+      NETGEN_VERSION  = "1.5.270"
       KLAYOUT_VERSION = "0.28.17"
       XSCHEM_VERSION  = "3.4.4"
     }
     scripts = [
+      "scripts/install_netgen.sh",
       "scripts/install_magic.sh",
       "scripts/install_xschem.sh",
       "scripts/install_klayout.sh",

scripts/install_netgen.sh

@@ -0,0 +1,12 @@
+#! /bin/sh
+
+set -e
+
+sudo apt-get install -y tcl-dev tk-dev
+
+git clone -b $NETGEN_VERSION https://github.com/RTimothyEdwards/netgen /tmp/netgen
+cd /tmp/netgen
+./configure
+make -j4
+sudo make install
+sudo rm -rf /tmp/netgen