configs: add the ability to disable paging via ui.paginate

CHANGELOG.md

@@ -53,6 +53,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * `jj log`/`obslog`/`op log` now supports `--limit N` option to show the first
   `N` entries.
 
+* Added the `ui.paginate` option to enable/disable pager usage in commands
+
 ### Fixed bugs
 
 * SSH authentication could hang when ssh-agent couldn't be reached

cli/src/cli_util.rs

@@ -2488,7 +2488,7 @@ fn handle_early_args(
         args.config_toml.push(format!(r#"ui.color="{choice}""#));
     }
     if args.no_pager.unwrap_or_default() {
-        ui.set_pagination(crate::ui::PaginationChoice::No);
+        ui.set_pagination(crate::ui::PaginationChoice::Never);
     }
     if !args.config_toml.is_empty() {
         layered_configs.parse_config_args(&args.config_toml)?;

cli/src/config-schema.json

@@ -55,6 +55,15 @@
                     ],
                     "default": "auto"
                 },
+                "paginate": {
+                    "type": "string",
+                    "description": "Whether or not to use a pager",
+                    "enum": [
+                        "never",
+                        "auto"
+                    ],
+                     "default": "auto"
+                },
                 "pager": {
                     "type": "string",
                     "description": "Pager to use for displaying command output",

cli/src/config/misc.toml

@@ -5,5 +5,6 @@
 # Placeholder: added by user
 
 [ui]
+paginate = "auto"
 pager = { command = ["less", "-FRX"], env = { LESSCHARSET = "utf-8" } }
 log-word-wrap = false

cli/src/ui.rs

@@ -84,13 +84,20 @@ fn use_color(choice: ColorChoice) -> bool {
     }
 }
 
-#[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
+#[derive(Clone, Copy, Debug, Default, Eq, PartialEq, serde::Deserialize)]
+#[serde(rename_all(deserialize = "kebab-case"))]
 pub enum PaginationChoice {
-    No,
+    Never,
     #[default]
     Auto,
 }
 
+fn pagination_setting(config: &config::Config) -> Result<PaginationChoice, CommandError> {
+    config
+        .get::<PaginationChoice>("ui.paginate")
+        .map_err(|err| CommandError::ConfigError(format!("Invalid `ui.paginate`: {err:?}")))
+}
+
 fn pager_setting(config: &config::Config) -> Result<CommandNameAndArgs, CommandError> {
     config
         .get::<CommandNameAndArgs>("ui.pager")
@@ -109,7 +116,7 @@ impl Ui {
             color,
             formatter_factory,
             pager_cmd: pager_setting(config)?,
-            paginate: PaginationChoice::Auto,
+            paginate: pagination_setting(config)?,
             progress_indicator,
             output: UiOutput::new_terminal(),
         })
@@ -117,6 +124,7 @@ impl Ui {
 
     pub fn reset(&mut self, config: &config::Config) -> Result<(), CommandError> {
         self.color = use_color(color_setting(config));
+        self.paginate = pagination_setting(config)?;
         self.pager_cmd = pager_setting(config)?;
         self.progress_indicator = progress_indicator_setting(config);
         let sanitize = io::stdout().is_terminal();
@@ -132,8 +140,9 @@ impl Ui {
     /// Switches the output to use the pager, if allowed.
     #[instrument(skip_all)]
     pub fn request_pager(&mut self) {
-        if self.paginate == PaginationChoice::No {
-            return;
+        match self.paginate {
+            PaginationChoice::Never => return,
+            PaginationChoice::Auto => {}
         }
 
         match self.output {

docs/config.md

@@ -267,6 +267,15 @@ a `$`):
 
 `less -FRX` is the default pager in the absence of any other setting.
 
+Additionally, paging behavior can be toggled via `ui.paginate` like so:
+
+```toml
+# Enable pagination for commands that support it (default) 
+ui.paginate = "auto"
+# Disable all pagination, equivalent to using --no-pager
+ui.paginate = "never"
+```
+
 ### Processing contents to be paged
 
 If you'd like to pass the output through a formatter e.g.