graphlog: inline node_template_for_key()

It's easier to follow than function call with 3 string parameters.

cli/src/commands/evolog.rs

@@ -85,6 +85,7 @@ pub(crate) fn cmd_evolog(
     let start_commit = workspace_command.resolve_single_rev(&args.revision)?;
 
     let diff_renderer = workspace_command.diff_renderer_for_log(&args.diff_format, args.patch)?;
+    let graph_style = GraphStyle::from_settings(command.settings())?;
     let with_content_format = LogContentFormat::new(ui, command.settings())?;
 
     let template;
@@ -105,7 +106,7 @@ pub(crate) fn cmd_evolog(
         node_template = workspace_command
             .parse_template(
                 &language,
-                &get_node_template(command.settings())?,
+                &get_node_template(graph_style, command.settings())?,
                 CommitTemplateLanguage::wrap_commit_opt,
             )?
             .labeled("node");
@@ -144,7 +145,6 @@ pub(crate) fn cmd_evolog(
         commits.truncate(n);
     }
     if !args.no_graph {
-        let graph_style = GraphStyle::from_settings(command.settings())?;
         let mut graph = get_graphlog(graph_style, formatter.raw());
         for commit in commits {
             let mut edges = vec![];

cli/src/commands/log.rs

@@ -20,6 +20,7 @@ use jj_lib::repo::Repo;
 use jj_lib::revset::RevsetExpression;
 use jj_lib::revset::RevsetFilterPredicate;
 use jj_lib::revset::RevsetIteratorExt;
+use jj_lib::settings::ConfigResultExt as _;
 use jj_lib::settings::UserSettings;
 use tracing::instrument;
 
@@ -31,7 +32,6 @@ use crate::command_error::CommandError;
 use crate::commit_templater::CommitTemplateLanguage;
 use crate::diff_util::DiffFormatArgs;
 use crate::graphlog::get_graphlog;
-use crate::graphlog::node_template_for_key;
 use crate::graphlog::Edge;
 use crate::graphlog::GraphStyle;
 use crate::ui::Ui;
@@ -120,6 +120,7 @@ pub(crate) fn cmd_log(
 
     let store = repo.store();
     let diff_renderer = workspace_command.diff_renderer_for_log(&args.diff_format, args.patch)?;
+    let graph_style = GraphStyle::from_settings(command.settings())?;
 
     let use_elided_nodes = command
         .settings()
@@ -145,7 +146,7 @@ pub(crate) fn cmd_log(
         node_template = workspace_command
             .parse_template(
                 &language,
-                &get_node_template(command.settings())?,
+                &get_node_template(graph_style, command.settings())?,
                 CommitTemplateLanguage::wrap_commit_opt,
             )?
             .labeled("node");
@@ -165,7 +166,6 @@ pub(crate) fn cmd_log(
         let limit = args.limit.or(args.deprecated_limit).unwrap_or(usize::MAX);
 
         if !args.no_graph {
-            let graph_style = GraphStyle::from_settings(command.settings())?;
             let mut graph = get_graphlog(graph_style, formatter.raw());
             let forward_iter = TopoGroupedGraphIterator::new(revset.iter_graph());
             let iter: Box<dyn Iterator<Item = _>> = if args.reversed {
@@ -297,11 +297,18 @@ pub(crate) fn cmd_log(
     Ok(())
 }
 
-pub fn get_node_template(settings: &UserSettings) -> Result<String, config::ConfigError> {
-    node_template_for_key(
-        settings,
-        "templates.log_node",
-        "builtin_log_node",
-        "builtin_log_node_ascii",
-    )
+pub fn get_node_template(
+    style: GraphStyle,
+    settings: &UserSettings,
+) -> Result<String, config::ConfigError> {
+    let symbol = settings
+        .config()
+        .get_string("templates.log_node")
+        .optional()?;
+    let default = if style.is_ascii() {
+        "builtin_log_node_ascii"
+    } else {
+        "builtin_log_node"
+    };
+    Ok(symbol.unwrap_or_else(|| default.to_owned()))
 }

cli/src/commands/operation/log.rs

@@ -15,6 +15,7 @@
 use std::slice;
 
 use jj_lib::op_walk;
+use jj_lib::settings::ConfigResultExt as _;
 use jj_lib::settings::UserSettings;
 
 use crate::cli_util::format_template;
@@ -22,7 +23,6 @@ use crate::cli_util::CommandHelper;
 use crate::cli_util::LogContentFormat;
 use crate::command_error::CommandError;
 use crate::graphlog::get_graphlog;
-use crate::graphlog::node_template_for_key;
 use crate::graphlog::Edge;
 use crate::graphlog::GraphStyle;
 use crate::operation_templater::OperationTemplateLanguage;
@@ -73,6 +73,7 @@ pub fn cmd_op_log(
     };
     let op_store = current_op.op_store();
 
+    let graph_style = GraphStyle::from_settings(command.settings())?;
     let with_content_format = LogContentFormat::new(ui, command.settings())?;
 
     let template;
@@ -99,7 +100,7 @@ pub fn cmd_op_log(
             .parse_template(
                 ui,
                 &language,
-                &get_node_template(command.settings())?,
+                &get_node_template(graph_style, command.settings())?,
                 OperationTemplateLanguage::wrap_operation,
             )?
             .labeled("node");
@@ -117,7 +118,6 @@ pub fn cmd_op_log(
     let limit = args.limit.or(args.deprecated_limit).unwrap_or(usize::MAX);
     let iter = op_walk::walk_ancestors(slice::from_ref(&current_op)).take(limit);
     if !args.no_graph {
-        let graph_style = GraphStyle::from_settings(command.settings())?;
         let mut graph = get_graphlog(graph_style, formatter.raw());
         for op in iter {
             let op = op?;
@@ -152,11 +152,18 @@ pub fn cmd_op_log(
     Ok(())
 }
 
-fn get_node_template(settings: &UserSettings) -> Result<String, config::ConfigError> {
-    node_template_for_key(
-        settings,
-        "templates.op_log_node",
-        "builtin_op_log_node",
-        "builtin_op_log_node_ascii",
-    )
+fn get_node_template(
+    style: GraphStyle,
+    settings: &UserSettings,
+) -> Result<String, config::ConfigError> {
+    let symbol = settings
+        .config()
+        .get_string("templates.op_log_node")
+        .optional()?;
+    let default = if style.is_ascii() {
+        "builtin_op_log_node_ascii"
+    } else {
+        "builtin_op_log_node"
+    };
+    Ok(symbol.unwrap_or_else(|| default.to_owned()))
 }

cli/src/graphlog.rs

@@ -17,7 +17,6 @@ use std::io;
 use std::io::Write;
 
 use itertools::Itertools;
-use jj_lib::settings::ConfigResultExt as _;
 use jj_lib::settings::UserSettings;
 use renderdag::Ancestor;
 use renderdag::GraphRowRenderer;
@@ -125,20 +124,6 @@ impl GraphStyle {
     }
 }
 
-pub fn node_template_for_key(
-    settings: &UserSettings,
-    key: &str,
-    fallback: &str,
-    ascii_fallback: &str,
-) -> Result<String, config::ConfigError> {
-    let symbol = settings.config().get_string(key).optional()?;
-    if GraphStyle::from_settings(settings)?.is_ascii() {
-        Ok(symbol.unwrap_or_else(|| ascii_fallback.to_owned()))
-    } else {
-        Ok(symbol.unwrap_or_else(|| fallback.to_owned()))
-    }
-}
-
 pub fn get_graphlog<'a, K: Clone + Eq + Hash + 'a>(
     style: GraphStyle,
     formatter: &'a mut dyn Write,