vcs: add Jujutsu support

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 * [#1870](https://github.com/bbatsov/projectile/pull/1870): Add package command for CMake projects.
 * [#1875](https://github.com/bbatsov/projectile/pull/1875): Add support for Sapling VCS.
+* [#1876](https://github.com/bbatsov/projectile/pull/1876): Add support for Jujutsu VCS.
 
 ## 2.8.0 (2023-10-13)
 

doc/modules/ROOT/pages/faq.adoc

@@ -59,7 +59,7 @@ automatically used when appropriate to improve performance.
 
 Inside version control repositories, VC tools are used when installed
 to list files more efficiently. The supported tools include git, hg,
-fossil, bzr, darcs, pijul, svn, and sapling.
+fossil, bzr, darcs, pijul, svn, sapling and jujutsu.
 
 Outside version control repositories, file search tools are used when
 installed for a faster search than pure Elisp. The supported tools

doc/modules/ROOT/pages/projects.adoc

@@ -32,6 +32,7 @@ a project. Out of the box Projectile supports:
 * Fossil
 * Darcs
 * Sapling
+* Jujutsu
 
 === File markers
 

doc/modules/ROOT/pages/usage.adoc

@@ -52,7 +52,7 @@ automatically used when appropriate to improve performance.
 
 Inside version control repositories, VC tools are used when installed
 to list files more efficiently. The supported tools include git, hg,
-fossil, bzr, darcs, pijul, svn, and sapling.
+fossil, bzr, darcs, pijul, svn, sapling and jujutsu.
 
 Outside version control repositories, file search tools are used when
 installed for a faster search than pure Elisp. The supported tools

projectile.el

@@ -332,6 +332,7 @@ See `projectile-register-project-type'."
     "_darcs"      ; Darcs VCS root dir
     ".pijul"      ; Pijul VCS root dir
     ".sl"         ; Sapling VCS root dir
+    ".jj"         ; Jujutsu VCS root dir
     )
   "A list of files considered to mark the root of a project.
 The bottommost (parentmost) match has precedence."
@@ -426,7 +427,8 @@ is set to `alien'."
     "^\\.ccls-cache$"
     "^\\.cache$"
     "^\\.clangd$"
-    "^\\.sl$")
+    "^\\.sl$"
+    "^\\.jj$")
   "A list of directories globally ignored by projectile.
 Regular expressions can be used.
 
@@ -725,6 +727,12 @@ Set to nil to disable listing submodules contents."
   :group 'projectile
   :type 'string)
 
+(defcustom projectile-jj-command "jj files --no-pager ."
+  "Command used by projectile to get the files in a Jujutsu project."
+  :group 'projectile
+  :type 'string
+  :package-version '(projectile . "2.9.0"))
+
 (defcustom projectile-sapling-command "sl locate -0 -I ."
   "Command used by projectile to get the files in a Sapling project."
   :group 'projectile
@@ -1469,6 +1477,7 @@ Fallback to a generic command when not in a VCS-controlled project."
     ('pijul projectile-pijul-command)
     ('svn projectile-svn-command)
     ('sapling projectile-sapling-command)
+    ('jj projectile-jj-command)
     (_ projectile-generic-command)))
 
 (defun projectile-get-sub-projects-command (vcs)
@@ -3659,6 +3668,7 @@ the variable `projectile-project-root'."
    ((projectile-file-exists-p (expand-file-name ".pijul" project-root)) 'pijul)
    ((projectile-file-exists-p (expand-file-name ".svn" project-root)) 'svn)
    ((projectile-file-exists-p (expand-file-name ".sl" project-root)) 'sapling)
+   ((projectile-file-exists-p (expand-file-name ".jj" project-root)) 'jj)
    ;; then we check if there's a VCS marker up the directory tree
    ;; that covers the case when a project is part of a multi-project repository
    ;; in those cases you can still the VCS to get a list of files for
@@ -3672,6 +3682,7 @@ the variable `projectile-project-root'."
    ((projectile-locate-dominating-file project-root ".pijul") 'pijul)
    ((projectile-locate-dominating-file project-root ".svn") 'svn)
    ((projectile-locate-dominating-file project-root ".sl") 'sapling)
+   ((projectile-locate-dominating-file project-root ".jj") 'jj)
    (t 'none)))
 
 (defun projectile--test-name-for-impl-name (impl-file-path)