Add README

Jenkinsfile

@@ -106,7 +106,7 @@ pipeline {
           stage("Getting CoreOS artefacts") {
             steps {
               sh '''
-                ./Update.sh --stream $STREAM --arch $ARCH --artifact $ARTIFACT --format $FORMAT --verbose true
+                ./Update.sh --stream $STREAM --arch $ARCH --artifact $ARTIFACT --format $FORMAT --history $ARTEFACTS_VERSIONS --verbose true
               '''
             }
           }

README.md

@@ -0,0 +1,46 @@
+# Update-CoreOS
+
+First of all, I'm used to consider containers as disposable ! What about OSes ? They are disposable to !
+That's why I'm using [Fedora CoreOS](https://getfedora.org/fr/coreos?stream=stable), an immutable OS absolutly disposable : Only datas are important !
+
+So, I'm used to boot CoreOS from a PXE/TFTP server, and to use containerized apps to deal with datas without installing anything !
+
+Let me describe this **WIP** repo ...
+
+## Update.sh
+
+**dependency** : You must have [`jq`](https://jqlang.github.io/jq/) installed
+
+A simple bash script, that relatively fit the need, that allow to download CoreOS artefacts.
+This script was firstly intended to manually download `x86_64/metal/pxe` artefacts for my home lab (defaults option values)
+I ended to make it more "agnostic" and "automation fitted" to allow downloading needed artefacts (with options)
+
+Options are, space delimited : (e.g.: `./Update.sh -v true`)
+
+- `-s` or `--stream` usually: stable, testing or next -> défault : `stable`
+- `-a` or `--arch` usually: aarch64, ppc64le, s390x, x86_64 -> default: `x86_64`
+- `-t` or `--artifact` ouch ! aliyun, aws, azure, azurestack, digitalocean, exoscale, gcp, hyperv, ibmcloud, kubevirt, metal, nutanix, openstack, qemu, irtualbox, vmware, vultr... and so on depending previous choices -> default : `metal`
+- `-f` or `--format`Arrgh ! Really depending of previous choices -> default : `pxe`
+- `-v` or `--verbose` If ever you want to see well formatted json output -> default : `false`
+- `-h` or `--history`default file path to `coreos.json` that must at least contains `{}`data, there's no error check for this option !
+
+It will ouput artefacts, GPG and SHASUM checked, and a file named as `$format.$artifact.$arch.$stream` that contains the list of downloaded files for later use .. or not
+`coreos.json`/`--history` file will be updated with version number from released/downloaded artefacts to remember last updates
+
+## Jenkinsfile
+
+The "end user" of `Update.sh` :
+
+- Will get gpg keys from [fedora  project](https://fedoraproject.org/fedora.gpg) as other things.
+- Will get latest history file from artefact server (the PXE/TFTP server)
+- Will `matrix` `Update.sh` options in order to use it and ...
+- Will get downloads from `Update.sh` and upload them to PXE/TFTP server via ssh
+- And save `--history` file to keep in memory of latest downloaded artefacts versions
+
+## coreos.json
+
+The f**g empty template of all things ! that's all we need to know :relaxed:
+
+## TODO
+
+send reboot cmd to servers that depend on PXE artefacts

Update.sh

@@ -88,7 +88,8 @@ then
         else
           rm $filename $filename.sig
       fi
-      failed=true
+
+      if [ try == 2 ]; then failed=true; fi;
 
     done
   done