feat(log): Add change_revset keybind to change the current log revset

being displayed in the log command

README.md

@@ -15,6 +15,7 @@
   - [View change summary from the log buffer](#view-change-summary-from-the-log-buffer)
   - [Diff any change](#diff-any-change)
   - [Diff revision history](#diff-revision-history)
+  - [Change the log revset from the log buffer](#change-the-log-revset-from-the-log-buffer)
   - [Describe a change](#describe-a-change)
   - [Edit changes](#edit-changes)
   - [Create new changes from the log buffer](#create-new-changes-from-the-log-buffer)
@@ -59,7 +60,7 @@
 - First class citizens with ui integration
   - `describe` / `desc` - Set change descriptions with a Git-style commit message editor
   - `status` / `st` - Show repository status
-  - `log` - Display log history with configurable options
+  - `log` - Display log history with configurable options and change the displayed revset from the log buffer
   - `diff` - Show changes with optional filtering by current file
   - `new` - Create a new change with optional parent selection
   - `edit` - Edit a change
@@ -122,6 +123,14 @@ You can now open a history-aware diff between two revisions:
 
 This is useful when you want to inspect the evolution of a stack or compare a revision range with commit history preserved instead of showing a single plain diff.
 
+### Change the log revset from the log buffer
+
+You can change which revset the log buffer is displaying without closing and reopening it:
+
+- `<C-r>` - Prompt for a new revset and reload the log buffer with it
+
+This is useful for quickly narrowing the log to something like `main::@`, `mutable()`, or any other revset while staying in the same log view.
+
 ### Describe a change
 
 You can describe any change directly from the log buffer:
@@ -492,6 +501,7 @@ The plugin also provides `:Jdiff`, `:Jvdiff`, and `:Jhdiff` commands for diffing
         quick_squash = "<S-s>",             -- Quick squash revision under cursor into its parent (ignore immutability)
         split = "<C-s>",                    -- Split the revision under cursor
         history = "<S-h>",                  -- Show a history-aware diff for the selected revision range
+        change_revset = "<C-r>",            -- Change the revset(s) being viewed in the log buffer
         tag_create = "<S-t>",               -- Create a tag on the revision under cursor
         summary = "<S-k>",                  -- Show summary tooltip for revision under cursor
         summary_tooltip = {

lua/jj/cmd/init.lua

@@ -56,6 +56,7 @@ local split_module = require("jj.cmd.split")
 --- @field summary_tooltip? jj.cmd.summary_tooltip.keymaps
 --- @field tag_set? string|string[]
 --- @field history? string|string[]
+--- @field change_revset? string|string[]
 
 --- @class jj.cmd.rebase.keymaps
 --- @field onto? string|string[]
@@ -199,6 +200,7 @@ M.config = {
 			split = "<C-s>",
 			tag_set = "<S-t>",
 			history = "<S-h>",
+			change_revset = "<C-r>",
 		},
 		status = {
 			open_file = "<CR>",

lua/jj/cmd/log.lua

@@ -692,6 +692,15 @@ function M.handle_log_tag_set(revset)
 	require("jj.cmd").tag_set(revset)
 end
 
+--- Handle log change revset
+function M.handle_log_change_revset()
+	vim.ui.input({ prompt = "Enter new revset: " }, function(input)
+		if input and input ~= "" then
+			M.log({ revisions = input })
+		end
+	end)
+end
+
 --- Handle opening a PR/MR from `jj log` buffer for the revision under cursor
 --- @param list_bookmarks? boolean If true, prompt to select from all bookmarks instead of using current revision
 function M.handle_log_open_pr(list_bookmarks)
@@ -1153,6 +1162,11 @@ function M.log_keymaps()
 			handler = M.handle_log_history,
 			modes = { "v" },
 		},
+		change_revset = {
+			desc = "Change the revset(s) being viewed",
+			handler = M.handle_log_change_revset,
+			modes = { "n", "v" },
+		},
 	}
 
 	local merged_keymaps = cmd.merge_keymaps(cmd.resolve_keymaps_from_specs(keymaps, specs), cmd.terminal_keymaps())