diff --git a/apps/koffice/Cargo.lock b/apps/koffice/Cargo.lock
index f79c22086be..f2fac4e32c3 100644
--- a/apps/koffice/Cargo.lock
+++ b/apps/koffice/Cargo.lock
@@ -83,6 +83,17 @@ dependencies = [
  "vec_map",
 ]
 
+[[package]]
+name = "colored"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3616f750b84d8f0de8a58bda93e08e2a81ad3f523089b05f1dffecab48c6cbd"
+dependencies = [
+ "atty",
+ "lazy_static",
+ "winapi",
+]
+
 [[package]]
 name = "dtoa"
 version = "0.4.7"
@@ -135,6 +146,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.86"
@@ -146,6 +163,9 @@ name = "libko"
 version = "1.0.0"
 dependencies = [
  "chrono",
+ "colored",
+ "env_logger",
+ "log",
  "logos",
  "serde",
  "serde_yaml",
diff --git a/apps/koffice/invoice/src/base.rs b/apps/koffice/invoice/src/base.rs
index a29af6480bf..7ca29476de4 100644
--- a/apps/koffice/invoice/src/base.rs
+++ b/apps/koffice/invoice/src/base.rs
@@ -4,6 +4,10 @@ use libko::*;
 use std::path::PathBuf;
 
 pub fn init(pid: Option<&str>, tf: Option<&str>, t: Option<&str>, rev: Option<&str>) -> Meta {
+    if let Some(_) = rev {
+        eprintln!("--rev parameter currently ignored");
+    }
+
     let mut meta = initialise();
 
     meta.project_id = pid.map(Into::into);
diff --git a/apps/koffice/invoice/src/cli.rs b/apps/koffice/invoice/src/cli.rs
index cbf27efe6cc..6565eb75e2e 100644
--- a/apps/koffice/invoice/src/cli.rs
+++ b/apps/koffice/invoice/src/cli.rs
@@ -10,6 +10,7 @@ pub enum Command {
     Init,
     Generate,
     Install,
+    Set(String, Option<String>),
 }
 
 pub fn parse() -> AppState {
@@ -42,34 +43,75 @@ pub fn parse() -> AppState {
         .settings(&[
             AppSettings::SubcommandRequired,
             AppSettings::GlobalVersion,
-            AppSettings::ColoredHelp,
             AppSettings::DontCollapseArgsInUsage,
         ])
         .subcommand(
             SubCommand::with_name("init")
                 .about("Initialise a new invoice config")
+                .arg(project_id.clone())
                 .arg(timefile)
                 .arg(revision.clone()),
         )
         .subcommand(
             SubCommand::with_name("generate")
                 .about("Generate an invoice PDF for a client/ project based on a template")
+                .arg(project_id)
                 .arg(revision)
                 .arg(template),
+        )
+        .subcommand(
+            SubCommand::with_name("set")
+                .about("Set a variable in the k-office configuration")
+                .arg(
+                    Arg::with_name("key")
+                        .required(true)
+                        .takes_value(true)
+                        .help("The configuration key to set"),
+                )
+                .arg(
+                    Arg::with_name("value")
+                        .takes_value(true)
+                        .help("The value to set the key to.  Missing value deletes the key"),
+                ),
         );
 
     let matches = app.get_matches();
 
-    let project_id = matches.value_of("project id");
-    let timefile = matches.value_of("timefile");
-    let template = matches.value_of("template");
-    let revision = matches.value_of("revision");
+    let project_id = match matches.subcommand() {
+        ("init", Some(vals)) => vals.value_of("project id"),
+        ("generate", Some(vals)) => vals.value_of("project id"),
+        _ => None,
+    };
+
+    let timefile = match matches.subcommand() {
+        ("init", Some(vals)) => vals.value_of("timefile"),
+        ("generate", Some(vals)) => vals.value_of("timefile"),
+        _ => None,
+    };
+
+    let template = match matches.subcommand() {
+        ("init", Some(vals)) => vals.value_of("template"),
+        ("generate", Some(vals)) => vals.value_of("template"),
+        _ => None,
+    };
+
+    let revision = match matches.subcommand() {
+        ("init", Some(vals)) => vals.value_of("revision"),
+        ("generate", Some(vals)) => vals.value_of("revision"),
+        _ => None,
+    };
+
+    let (key, value) = match matches.subcommand() {
+        ("set", Some(vals)) => (vals.value_of("key"), vals.value_of("value")),
+        _ => (None, None),
+    };
 
     AppState {
         meta: crate::base::init(project_id, timefile, template, revision),
         cmd: match matches.subcommand() {
             ("init", _) => Command::Init,
             ("generate", _) => Command::Generate,
+            ("set", _) => Command::Set(key.unwrap().into(), value.map(Into::into)),
             _ => unreachable!(),
         },
     }
diff --git a/apps/koffice/invoice/src/main.rs b/apps/koffice/invoice/src/main.rs
index 742b74be0b0..174c2d4dda2 100644
--- a/apps/koffice/invoice/src/main.rs
+++ b/apps/koffice/invoice/src/main.rs
@@ -1,3 +1,9 @@
+//! A simple invoice generator script
+
+#![allow(warnings)]
+
+#[macro_use] extern crate log;
+#[macro_use] extern crate libko;
 
 mod base;
 mod cli;
@@ -7,35 +13,53 @@ pub(crate) use base::*;
 pub(crate) use cli::*;
 pub(crate) use pfile::*;
 
+use env_logger::Builder;
 use libko::*;
-use std::{io::Write, fs::OpenOptions as Oo};
+use std::{fs::OpenOptions as Oo, io::Write};
 
 fn main() {
+    log_util::initialise();
+
     let AppState { meta, cmd } = cli::parse();
 
     match cmd {
         Command::Init => init(meta),
         Command::Generate => generate(meta),
         Command::Install => todo!(),
+        Command::Set(k, v) => set(meta, k, v),
     }
 }
 
+/// Initialise a new project invoice with a a metadata set
 fn init(meta: Meta) {
-    let pid = meta.project_id.as_ref().unwrap_or_else(|| {
-        meta.timefile
-            .as_ref()
-            .expect("No project id given, with no timefile available")
-            .client()
-            .as_ref()
-            .unwrap()
-    });
+    let pid = meta
+        .project_id
+        .as_ref()
+        .unwrap_or_else(|| match meta.timefile.as_ref() {
+            Some(tf) => match tf.client().as_ref() {
+                Some(c) => c,
+                None => fatal!("No project id given; timefile has no 'project' key!"),
+            },
+            None => fatal!("No project id given; no timefile available"),
+        });
 
     let path = meta.invoice_dir.join(pid);
-    let mut f = Oo::new().write(true).truncate(true).open(path).unwrap();
-    f.write_all(pfile::data_templ().as_bytes()).unwrap();
-    
-    // let pid = meta.project_id.as_ref().unwrap_or_else(||
-    // let f = meta.invoice_dir.join(meta.project_id);
+
+    let invoice_id = meta.new_invoice_id();
+
+    // let mut f = match Oo::new().write(true).truncate(true).open(path.clone()) {
+    //     Ok(f) => f,
+    //     _ => fatal!(
+    //         "Failed to create directory {}",
+    //         path.to_str().expect("Path contained non UTF-8 :(")
+    //     ),
+    // };
+
+    // f.write_all(pfile::data_templ(&meta).as_bytes()).unwrap();
 }
 
 fn generate(meta: Meta) {}
+
+fn set(meta: Meta, k: String, v: Option<String>) {
+    meta.update_config(k, v);
+}
diff --git a/apps/koffice/invoice/src/pfile.rs b/apps/koffice/invoice/src/pfile.rs
index ec99e5ab304..71912162d52 100644
--- a/apps/koffice/invoice/src/pfile.rs
+++ b/apps/koffice/invoice/src/pfile.rs
@@ -1,4 +1,4 @@
-use crate::{Account, Address, Worker, InvoiceId};
+use crate::{Meta, Account, Address, Worker, InvoiceId};
 use chrono::NaiveDate;
 use serde::{Serialize, Deserialize};
 
@@ -27,7 +27,8 @@ pub enum ServiceEntry {
     }
 }
 
-pub fn data_templ() -> String {
-
+pub fn data_templ(meta: &Meta) -> String {
+    let invoice_id = meta.new_invoice_id();
+    
     todo!()
 }