Add config command

Cargo.toml

@@ -16,6 +16,7 @@ anyhow = "1.*"
 clap = { version = "4.0.26", features = ["derive"] }
 clap_complete = "4.0.5"
 crossterm = "0.25.0"
+dialoguer = { git = "https://github.com/SIMULATAN/dialoguer", features = [] }
 diff = "0.1.*"
 handlebars = "5.*"
 hostname = "0.3.*"

README.md

@@ -48,6 +48,7 @@ Usage: dotter [OPTIONS] [COMMAND]
 
 Commands:
   deploy           Deploy the files to their respective targets. This is the default subcommand
+  config           Interactively modify the local configuration file
   undeploy         Delete all deployed files from their target locations. Note that this operates on all files that are currently in cache
   init             Initialize global.toml with a single package containing all the files in the current directory pointing to a dummy value and a local.toml that selects that package
   watch            Run continuously, watching the repository for changes and deploying as soon as they happen. Can be ran with `--dry-run`

src/args.rs

@@ -93,6 +93,9 @@ pub enum Action {
     #[default]
     Deploy,
 
+    /// Interactively modify the local configuration file.
+    Config,
+
     /// Delete all deployed files from their target locations.
     /// Note that this operates on all files that are currently in cache.
     Undeploy,

src/config.rs

@@ -96,64 +96,44 @@ pub struct Configuration {
 #[serde(deny_unknown_fields)]
 pub struct Package {
     #[serde(default)]
-    depends: Vec<String>,
+    pub depends: Vec<String>,
     #[serde(default)]
     files: Files,
     #[serde(default)]
     variables: Variables,
 }
 
 #[derive(Debug, Deserialize, Serialize)]
-struct GlobalConfig {
+pub struct GlobalConfig {
     #[serde(default)]
     #[cfg(feature = "scripting")]
     helpers: Helpers,
     #[serde(flatten)]
-    packages: BTreeMap<String, Package>,
+    pub packages: BTreeMap<String, Package>,
 }
 
 type IncludedConfig = BTreeMap<String, Package>;
 
-#[derive(Debug, Deserialize, Serialize)]
+#[derive(Debug, Deserialize, Serialize, Default)]
 #[serde(deny_unknown_fields)]
-struct LocalConfig {
+pub struct LocalConfig {
     #[serde(default)]
     includes: Vec<PathBuf>,
-    packages: Vec<String>,
+    pub packages: Vec<String>,
     #[serde(default)]
     files: Files,
     #[serde(default)]
     variables: Variables,
 }
 
 pub fn load_configuration(
-    local_config: &Path,
-    global_config: &Path,
+    local_config_path: &Path,
+    global_config_path: &Path,
     patch: Option<Package>,
 ) -> Result<Configuration> {
-    let global: GlobalConfig = filesystem::load_file(global_config)
-        .and_then(|c| c.ok_or_else(|| anyhow::anyhow!("file not found")))
-        .with_context(|| format!("load global config {:?}", global_config))?;
-    trace!("Global config: {:#?}", global);
-
-    // If local.toml can't be found, look for a file named <hostname>.toml instead
-    let mut local_config_buf = local_config.to_path_buf();
-    if !local_config_buf.exists() {
-        let hostname = hostname::get()
-            .context("failed to get the computer hostname")?
-            .into_string()
-            .expect("hostname cannot be converted to string");
-        info!(
-            "{:?} not found, using {}.toml instead (based on hostname)",
-            local_config, hostname
-        );
-        local_config_buf.set_file_name(&format!("{}.toml", hostname));
-    }
+    let global = load_global_config(global_config_path)?;
 
-    let local: LocalConfig = filesystem::load_file(local_config_buf.as_path())
-        .and_then(|c| c.ok_or_else(|| anyhow::anyhow!("file not found")))
-        .with_context(|| format!("load local config {:?}", local_config))?;
-    trace!("Local config: {:#?}", local);
+    let local = load_local_config(local_config_path)?.context("local config not found")?;
 
     let mut merged_config =
         merge_configuration_files(global, local, patch).context("merge configuration files")?;
@@ -185,6 +165,37 @@ pub fn load_configuration(
     Ok(merged_config)
 }
 
+pub fn load_global_config(global_config: &Path) -> Result<GlobalConfig> {
+    let global: GlobalConfig = filesystem::load_file(global_config)
+        .and_then(|c| c.ok_or_else(|| anyhow::anyhow!("file not found")))
+        .with_context(|| format!("load global config {:?}", global_config))?;
+    trace!("Global config: {:#?}", global);
+
+    Ok(global)
+}
+
+pub fn load_local_config(local_config: &Path) -> Result<Option<LocalConfig>> {
+    // If local.toml can't be found, look for a file named <hostname>.toml instead
+    let mut local_config_buf = local_config.to_path_buf();
+    if !local_config_buf.exists() {
+        let hostname = hostname::get()
+            .context("failed to get the computer hostname")?
+            .into_string()
+            .expect("hostname cannot be converted to string");
+        info!(
+            "{:?} not found, using {}.toml instead (based on hostname)",
+            local_config, hostname
+        );
+        local_config_buf.set_file_name(&format!("{}.toml", hostname));
+    }
+
+    let local: Option<LocalConfig> = filesystem::load_file(local_config_buf.as_path())
+        .with_context(|| format!("load local config {:?}", local_config))?;
+    trace!("Local config: {:#?}", local);
+
+    Ok(local)
+}
+
 #[derive(Debug, Serialize, Deserialize, Default, Clone)]
 #[serde(deny_unknown_fields)]
 pub struct Cache {
@@ -258,7 +269,7 @@ fn recursive_extend_map(
 }
 
 #[allow(clippy::map_entry)]
-fn merge_configuration_files(
+pub fn merge_configuration_files(
     mut global: GlobalConfig,
     local: LocalConfig,
     patch: Option<Package>,