feat: new step Lensfun's database update (#839)

* feat: new step Lensfun's database update

* refactor: take 1 as a success exit code

config.example.toml

@@ -244,3 +244,10 @@
 [containers]
 # Specify the containers to ignore while updating (Wildcard supported)
 # ignored_containers = ["ghcr.io/rancher-sandbox/rancher-desktop/rdx-proxy:latest", "docker.io*"]
+
+[lensfun]
+# If disabled, Topgrade invokes `lensfun‑update‑data` without root priviledge, 
+# then the update will be only available to you. Otherwise, `sudo` is required,
+# and the update will be installed system-wide, i.e., available to all users.
+# (default: false)
+# use_sudo = false

src/config.rs

@@ -101,6 +101,7 @@ pub enum Step {
     Helix,
     Krew,
     Lure,
+    Lensfun,
     Macports,
     Mamba,
     Miktex,
@@ -396,6 +397,12 @@ pub struct Misc {
     log_filters: Option<Vec<String>>,
 }
 
+#[derive(Deserialize, Default, Debug, Merge)]
+#[serde(deny_unknown_fields)]
+pub struct Lensfun {
+    use_sudo: Option<bool>,
+}
+
 #[derive(Deserialize, Default, Debug, Merge)]
 #[serde(deny_unknown_fields)]
 /// Configuration file
@@ -456,6 +463,9 @@ pub struct ConfigFile {
 
     #[merge(strategy = crate::utils::merge_strategies::inner_merge_opt)]
     distrobox: Option<Distrobox>,
+
+    #[merge(strategy = crate::utils::merge_strategies::inner_merge_opt)]
+    lensfun: Option<Lensfun>,
 }
 
 fn config_directory() -> PathBuf {
@@ -1523,6 +1533,14 @@ impl Config {
 
         self.opt.custom_commands.iter().any(|s| s == name)
     }
+
+    pub fn lensfun_use_sudo(&self) -> bool {
+        self.config_file
+            .lensfun
+            .as_ref()
+            .and_then(|lensfun| lensfun.use_sudo)
+            .unwrap_or(false)
+    }
 }
 
 #[cfg(test)]

src/main.rs

@@ -412,6 +412,9 @@ fn run() -> Result<()> {
     runner.execute(Step::PlatformioCore, "PlatformIO Core", || {
         generic::run_platform_io(&ctx)
     })?;
+    runner.execute(Step::Lensfun, "Lensfun's database update", || {
+        generic::run_lensfun_update_data(&ctx)
+    })?;
 
     if should_run_powershell {
         runner.execute(Step::Powershell, "Powershell Modules Update", || {

src/steps/generic.rs

@@ -977,3 +977,28 @@ pub fn run_platform_io(ctx: &ExecutionContext) -> Result<()> {
 
     ctx.run_type().execute(bin_path).arg("upgrade").status_checked()
 }
+
+/// Run `lensfun-update-data` to update lensfun database.
+///
+/// `sudo` will be used if `use_sudo` configuration entry is set to true.
+pub fn run_lensfun_update_data(ctx: &ExecutionContext) -> Result<()> {
+    const SEPARATOR: &str = "Lensfun's database update";
+    let lensfun_update_data = require("lensfun-update-data")?;
+    const EXIT_CODE_WHEN_NO_UPDATE: i32 = 1;
+
+    if ctx.config().lensfun_use_sudo() {
+        let sudo = require_option(ctx.sudo().as_ref(), REQUIRE_SUDO.to_string())?;
+        print_separator(SEPARATOR);
+        ctx.run_type()
+            .execute(sudo)
+            .arg(lensfun_update_data)
+            // `lensfun-update-data` returns 1 when there is no update available
+            // which should be considered success
+            .status_checked_with_codes(&[EXIT_CODE_WHEN_NO_UPDATE])
+    } else {
+        print_separator(SEPARATOR);
+        ctx.run_type()
+            .execute(lensfun_update_data)
+            .status_checked_with_codes(&[EXIT_CODE_WHEN_NO_UPDATE])
+    }
+}