ledger: default folder in home directory

.changelog/unreleased/improvements/1138-base-directory.md

@@ -0,0 +1,2 @@
+- Changed the default base directory. On linux, the default path will be `$XDG_DATA_HOME/com.heliax.namada`, on OSX it will be `$HOME/.local/share/com.heliax.namada`.
+  ([#1138](https://github.com/anoma/namada/pull/1138))

apps/Cargo.toml

@@ -151,6 +151,7 @@ masp_proofs = { git = "https://github.com/anoma/masp", rev = "bee40fc465f6afbd10
 bimap = {version = "0.6.2", features = ["serde"]}
 rust_decimal = "1.26.1"
 rust_decimal_macros = "1.26.1"
+directories = "4.0.1"
 
 [dev-dependencies]
 namada = {path = "../shared", default-features = false, features = ["testing", "wasm-runtime"]}

apps/src/lib/cli.rs

@@ -1582,8 +1582,7 @@ pub mod args {
     use super::utils::*;
     use super::{ArgGroup, ArgMatches};
     use crate::client::types::{ParsedTxArgs, ParsedTxTransferArgs};
-    use crate::config;
-    use crate::config::TendermintMode;
+    use crate::config::{self, TendermintMode};
     use crate::facade::tendermint::Timeout;
     use crate::facade::tendermint_config::net::Address as TendermintAddress;
 
@@ -1598,7 +1597,7 @@ pub mod args {
         "base-dir",
         DefaultFn(|| match env::var("NAMADA_BASE_DIR") {
             Ok(dir) => dir.into(),
-            Err(_) => config::DEFAULT_BASE_DIR.into(),
+            Err(_) => config::get_default_namada_folder(),
         }),
     );
     // const BLOCK_HEIGHT_OPT: ArgOpt<BlockHeight> = arg_opt("height");
@@ -1731,7 +1730,9 @@ pub mod args {
                      configuration and state is stored. This value can also \
                      be set via `NAMADA_BASE_DIR` environment variable, but \
                      the argument takes precedence, if specified. Defaults to \
-                     `.namada`.",
+                     `$XDG_DATA_HOME/com.heliax.namada` or \
+                     `$HOME/.local/share/com.heliax.namada` depending on the \
+                     operating system (former is linux, latter is osx).",
                 ))
                 .arg(WASM_DIR.def().about(
                     "Directory with built WASM validity predicates, \

apps/src/lib/config/mod.rs

@@ -10,6 +10,7 @@ use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 
+use directories::ProjectDirs;
 use namada::types::chain::ChainId;
 use namada::types::time::Rfc3339String;
 use serde::{Deserialize, Serialize};
@@ -348,6 +349,14 @@ impl Config {
     }
 }
 
+pub fn get_default_namada_folder() -> PathBuf {
+    if let Some(project_dir) = ProjectDirs::from("com", "heliax", "namada") {
+        project_dir.data_dir().to_path_buf()
+    } else {
+        DEFAULT_BASE_DIR.into()
+    }
+}
+
 pub const VALUE_AFTER_TABLE_ERROR_MSG: &str = r#"
 Error while serializing to toml. It means that some nested structure is followed
  by simple fields.

documentation/docs/src/user-guide/ledger.md

@@ -10,9 +10,9 @@ namada ledger
 
 The node will attempt to connect to the persistent validator nodes and other peers in the network, and synchronize to the latest block.
 
-By default, the ledger will store its configuration and state in the `.namada` directory relative to the current working directory. You can use the `--base-dir` CLI global argument or `NAMADA_BASE_DIR` environment variable to change it.
+By default, the ledger will store its configuration and state in the `.namada` directory in either `$XDG_DATA_HOME/<project_path>` or `$HOME/.local/share/<project_path>`, where `<project_path>` is `com.heliax.namada`. You can use the `--base-dir` CLI global argument or `NAMADA_BASE_DIR` environment variable to change it.
 
-The ledger also needs access to the built WASM files that are used in the genesis block. These files are included in release and shouldn't be modified, otherwise your node will fail with a consensus error on the genesis block. By default, these are expected to be in the `wasm` directory, relative to the current working directory. This can also be set with the `--wasm-dir` CLI global argument, `NAMADA_WASM_DIR` environment variable or the configuration file.
+The ledger also needs access to the built WASM files that are used in the genesis block. These files are included in release and shouldn't be modified, otherwise your node will fail with a consensus error on the genesis block. By default, these are expected to be in the `wasm` directory inside the chain directory that's in the base directory. This can also be set with the `--wasm-dir` CLI global argument, `NAMADA_WASM_DIR` environment variable or the configuration file.
 
 The ledger configuration is stored in `.namada/{chain_id}/config.toml` (with
 default `--base-dir`). It is created when you join the network. You can modify