add prune job config

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

pbs-config/src/lib.rs

@@ -7,6 +7,7 @@ pub mod drive;
 pub mod key_config;
 pub mod media_pool;
 pub mod network;
+pub mod prune;
 pub mod remote;
 pub mod sync;
 pub mod tape_encryption_keys;

pbs-config/src/prune.rs

@@ -0,0 +1,56 @@
+use std::collections::HashMap;
+
+use anyhow::Error;
+use lazy_static::lazy_static;
+
+use proxmox_schema::*;
+use proxmox_section_config::{SectionConfig, SectionConfigData, SectionConfigPlugin};
+
+use pbs_api_types::{PruneJobConfig, JOB_ID_SCHEMA};
+
+use crate::{open_backup_lockfile, replace_backup_config, BackupLockGuard};
+
+lazy_static! {
+    pub static ref CONFIG: SectionConfig = init();
+}
+
+fn init() -> SectionConfig {
+    const OBJ_SCHEMA: &AllOfSchema = PruneJobConfig::API_SCHEMA.unwrap_all_of_schema();
+
+    let plugin =
+        SectionConfigPlugin::new("prune".to_string(), Some(String::from("id")), OBJ_SCHEMA);
+    let mut config = SectionConfig::new(&JOB_ID_SCHEMA);
+    config.register_plugin(plugin);
+
+    config
+}
+
+pub const PRUNE_CFG_FILENAME: &str = "/etc/proxmox-backup/prune.cfg";
+pub const PRUNE_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.prune.lck";
+
+/// Get exclusive lock
+pub fn lock_config() -> Result<BackupLockGuard, Error> {
+    open_backup_lockfile(PRUNE_CFG_LOCKFILE, None, true)
+}
+
+pub fn config() -> Result<(SectionConfigData, [u8; 32]), Error> {
+    let content = proxmox_sys::fs::file_read_optional_string(PRUNE_CFG_FILENAME)?;
+    let content = content.unwrap_or_else(String::new);
+
+    let digest = openssl::sha::sha256(content.as_bytes());
+    let data = CONFIG.parse(PRUNE_CFG_FILENAME, &content)?;
+    Ok((data, digest))
+}
+
+pub fn save_config(config: &SectionConfigData) -> Result<(), Error> {
+    let raw = CONFIG.write(PRUNE_CFG_FILENAME, config)?;
+    replace_backup_config(PRUNE_CFG_FILENAME, raw.as_bytes())
+}
+
+// shell completion helper
+pub fn complete_prune_job_id(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
+    match config() {
+        Ok((data, _digest)) => data.sections.iter().map(|(id, _)| id.to_string()).collect(),
+        Err(_) => return vec![],
+    }
+}