The default case for property names in TOML configuration files is de
facto snake_case. The answer file for the auto-installer adapted this,
but this causes inconsistencies with the property names in other Proxmox
config file formats, which are preferably in kebab-case.

To gradually migrate from snake_cased to kebab-cased property names in
answer files, allow both cases for the time being and deprecate the
snake_cased variant of all properties in a future major version.

Signed-off-by: Daniel Kral <d.k...@proxmox.com>
---
 proxmox-auto-installer/src/answer.rs | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/proxmox-auto-installer/src/answer.rs 
b/proxmox-auto-installer/src/answer.rs
index e8614d2..c834591 100644
--- a/proxmox-auto-installer/src/answer.rs
+++ b/proxmox-auto-installer/src/answer.rs
@@ -10,6 +10,9 @@ use proxmox_installer_common::{
 use serde::{Deserialize, Serialize};
 use std::{collections::BTreeMap, io::BufRead, net::IpAddr};
 
+// NOTE New answer file properties must use kebab-case, but should allow 
snake_case for backwards
+// compatibility. TODO Remove the snake_cased variants in a future major 
version (e.g. PVE 10).
+
 // BTreeMap is used to store filters as the order of the filters will be 
stable, compared to
 // storing them in a HashMap
 
@@ -40,27 +43,30 @@ impl Answer {
 }
 
 #[derive(Clone, Deserialize, Debug)]
-#[serde(deny_unknown_fields)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct Global {
     pub country: String,
     pub fqdn: Fqdn,
     pub keyboard: KeyboardLayout,
     pub mailto: String,
     pub timezone: String,
+    #[serde(alias = "root_password")]
     pub root_password: Option<String>,
+    #[serde(alias = "root_password_hashed")]
     pub root_password_hashed: Option<String>,
-    #[serde(default)]
+    #[serde(alias = "reboot_on_error", default)]
     pub reboot_on_error: bool,
-    #[serde(default)]
+    #[serde(alias = "root_ssh_keys", default)]
     pub root_ssh_keys: Vec<String>,
 }
 
 #[derive(Clone, Deserialize, Debug)]
-#[serde(deny_unknown_fields)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct PostNotificationHookInfo {
     /// URL to send a POST request to
     pub url: String,
     /// SHA256 cert fingerprint if certificate pinning should be used.
+    #[serde(alias = "cert_fingerprint")]
     pub cert_fingerprint: Option<String>,
 }
 
@@ -209,12 +215,13 @@ pub struct NetworkManual {
 }
 
 #[derive(Clone, Debug, Deserialize)]
-#[serde(deny_unknown_fields)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct DiskSetup {
     pub filesystem: Filesystem,
-    #[serde(default)]
+    #[serde(alias = "disk_list", default)]
     pub disk_list: Vec<String>,
     pub filter: Option<BTreeMap<String, String>>,
+    #[serde(alias = "filter_match")]
     pub filter_match: Option<FilterMatch>,
     pub zfs: Option<ZfsOptions>,
     pub lvm: Option<LvmOptions>,
@@ -330,10 +337,11 @@ pub enum Filesystem {
 }
 
 #[derive(Clone, Copy, Default, Deserialize, Debug)]
-#[serde(deny_unknown_fields)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct ZfsOptions {
     pub raid: Option<ZfsRaidLevel>,
     pub ashift: Option<usize>,
+    #[serde(alias = "arc_max")]
     pub arc_max: Option<usize>,
     pub checksum: Option<ZfsChecksumOption>,
     pub compress: Option<ZfsCompressOption>,
-- 
2.39.5



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