feat: Add :try for depends-on DSL

CHANGELOG.md

@@ -10,6 +10,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 
 * fix(install): Package installed calculation (a479d5355dfc832286288b790338652e174d606d)
 * fix(install-file): Get correct install package name (#318)
+* feat: Add `:try` for `depends-on` DSL (#319)
 
 ## 0.11.x
 > Released Apr 03, 2025

docs/content/DSL/_index.en.md

@@ -165,6 +165,14 @@ Specify dependencies in **vc** format:
 (depends-on "lsp-ui" :vc "emacs-lsp/lsp-ui")
 ```
 
+Specify dependencies in **try** format:
+
+```elisp
+(depends-on "auto-rename-tag" :try "https://raw.githubusercontent.com/emacs-vs/auto-rename-tag/refs/heads/master/auto-rename-tag.el")
+
+(depends-on "lsp-ui" :try)  ; Try it, don't install it.
+```
+
 Specify dependencies in **recipe** format:
 
 ```elisp

docs/content/DSL/_index.zh-tw.md

@@ -161,6 +161,14 @@ weight: 200
 (depends-on "lsp-ui" :vc "emacs-lsp/lsp-ui")
 ```
 
+以 **try** 格式指定依賴項：
+
+```elisp
+(depends-on "auto-rename-tag" :try "https://raw.githubusercontent.com/emacs-vs/auto-rename-tag/refs/heads/master/auto-rename-tag.el")
+
+(depends-on "lsp-ui" :try)  ; 只有試看看, 不安裝.
+```
+
 以 **recipe** 格式指定依賴項：
 
 ```elisp

lisp/_prepare.el

@@ -566,6 +566,10 @@ For arguments FUNC and DEPS, see function `mapc' for more information."
      ((memq :vc dep)
       (let ((spec (cdr (memq :vc dep))))
         (eask-package-vc-install name spec)))
+     ;; Try out packages using `try'.
+     ((memq :try dep)
+      (let ((url-or-package (nth 2 dep)))
+        (eask-package-try name url-or-package)))
      ;; Fallback to archive install.
      (t (eask-package-install name)))))
 
@@ -694,6 +698,23 @@ Argument BODY are forms for execution."
   "Return non-nil if package (PKG) is installable."
   (assq (eask-intern pkg) package-archive-contents))
 
+(defun eask-package-try (pkg &optional url-or-package)
+  "To try a package (PKG) without actually install it.
+
+The optional argument URL-OR-PACKAGE is used in the function `try'."
+  (eask-defvc< 27 (eask-pkg-init))  ; XXX: remove this after we drop 26.x
+  (eask-with-progress
+    (format "  - %sTrying out %s%s... " eask--action-prefix
+            (ansi-green (eask-2str pkg))
+            (if url-or-package
+                (concat " in " (ansi-yellow url-or-package))
+              ""))
+    (eask-with-verbosity 'debug
+      (eask-archive-install-packages '("gnu" "melpa") 'try)
+      (require 'try)
+      (try (or url-or-package pkg)))
+    "done ✓"))
+
 (defun eask-package-vc-install (pkg spec)
   "To vc install the package (PKG) by argument SPEC."
   (eask-defvc< 27 (eask-pkg-init))  ; XXX: remove this after we drop 26.x
@@ -757,23 +778,24 @@ Argument BODY are forms for execution."
         (unless (eask-package-installable-p pkg)
           (eask-error "Package not installable `%s'; make sure the package archive (source) is included" pkg))))
      (t
-      (eask-with-progress
-        (format "  - %s%snstalling %s (%s)... " eask--action-prefix
-                (if should-reinstall-p "Rei" "I")
-                name version)
-        (eask-with-verbosity 'debug
-          ;; Handle `--force` flag.
-          (when should-reinstall-p (package-delete (eask-package-desc pkg t) t))
-          ;; XXX: Without ignore-errors guard, it will trigger error
-          ;;
-          ;;   Can't find library xxxxxxx.el
-          ;;
-          ;; But we can remove this after Emacs 28, since function `find-library-name'
-          ;; has replaced the function `signal' instead of the `error'.
-          ;;
-          ;; Install it.
-          (eask-ignore-errors (package-install pkg)))
-        "done ✓")))))
+      (eask--pkg-process pkg  ; Second call to force refresh the data.
+        (eask-with-progress
+          (format "  - %s%snstalling %s (%s)... " eask--action-prefix
+                  (if should-reinstall-p "Rei" "I")
+                  name version)
+          (eask-with-verbosity 'debug
+            ;; Handle `--force` flag.
+            (when should-reinstall-p (package-delete (eask-package-desc pkg t) t))
+            ;; XXX: Without ignore-errors guard, it will trigger error
+            ;;
+            ;;   Can't find library xxxxxxx.el
+            ;;
+            ;; But we can remove this after Emacs 28, since function `find-library-name'
+            ;; has replaced the function `signal' instead of the `error'.
+            ;;
+            ;; Install it.
+            (eask-ignore-errors (package-install pkg)))
+          "done ✓"))))))
 
 (defun eask-package-delete (pkg)
   "Delete the package (PKG)."
@@ -783,7 +805,7 @@ Argument BODY are forms for execution."
      ((not installed-p)
       (eask-msg "  - %sSkipping %s (%s)... not installed ✗" eask--action-prefix name version))
      (t
-      (eask--pkg-process pkg
+      (eask--pkg-process pkg  ; Second call to force refresh the data.
         (eask-with-progress
           (format "  - %sUninstalling %s (%s)... " eask--action-prefix name version)
           (eask-with-verbosity 'debug
@@ -800,12 +822,13 @@ Argument BODY are forms for execution."
       (eask-msg "  - %sSkipping %s (%s)... not installed ✗" eask--action-prefix name version))
      (t
       (eask-pkg-init)
-      (eask-with-progress
-        (format "  - %sReinstalling %s (%s)... " eask--action-prefix name version)
-        (eask-with-verbosity 'debug
-          (package-delete (eask-package-desc pkg t) t)
-          (eask-ignore-errors (package-install pkg)))
-        "done ✓")))))
+      (eask--pkg-process pkg  ; Second call to force refresh the data.
+        (eask-with-progress
+          (format "  - %sReinstalling %s (%s)... " eask--action-prefix name version)
+          (eask-with-verbosity 'debug
+            (package-delete (eask-package-desc pkg t) t)
+            (eask-ignore-errors (package-install pkg)))
+          "done ✓"))))))
 
 (defun eask-package-desc (name &optional current)
   "Build package description by its NAME.
@@ -1547,6 +1570,7 @@ argument COMMAND."
   "Setup dependencies list."
   (setq eask-depends-on (reverse eask-depends-on)
         eask-depends-on-dev (reverse eask-depends-on-dev))
+  ;; On recipe
   (when eask-depends-on-recipe-p
     (eask-with-progress
       (format "✓ Checking local archives %s... "
@@ -1593,22 +1617,18 @@ ELPA)."
             (eask-error "This requires Emacs %s and above!" minimum-version)
           (push recipe eask-depends-on-emacs))
         recipe)))
-   ;; No argument specify
-   ((<= (length args) 1)
-    (let* ((minimum-version (car args))
-           (recipe (list pkg minimum-version)))
-      (unless (eask--check-depends-on recipe)
-        (push recipe eask-depends-on))
-      recipe))
-   ;; File packages
-   ((memq :file args)
+   ;; Specified packages
+   ((or (memq :file args)  ; File packages
+        (memq :vc args)    ; VC packages
+        (memq :try args))  ; Try packages
     (let* ((recipe (append (list (intern pkg)) args)))
       (unless (eask--check-depends-on recipe)
         (push recipe eask-depends-on))
       recipe))
-   ;; VC packages
-   ((memq :vc args)
-    (let* ((recipe (append (list (intern pkg)) args)))
+   ;; No argument specify
+   ((<= (length args) 1)
+    (let* ((minimum-version (car args))
+           (recipe (list pkg minimum-version)))
       (unless (eask--check-depends-on recipe)
         (push recipe eask-depends-on))
       recipe))

lisp/core/info.el

@@ -27,11 +27,12 @@
             offset (eask-2str eask-info--max-offset))
       (dolist (dep dependencies)
         (let* ((target-version (cdr dep))
-               (target-version (cond ((= (length target-version) 1)
+               (target-version (cond ((memq :file dep) "file")
+                                     ((memq :vc dep)   "vc")
+                                     ((memq :try dep)  "try")
+                                     ((= (length target-version) 1)
                                       (or (nth 0 target-version)  ; verison number
                                           "archive"))
-                                     ((memq :file dep) "file")
-                                     ((memq :vc dep)   "vc")
                                      (t                "recipe"))))
           (eask-println (concat "  %-" offset "s (%s)") (car dep) target-version)
           (eask-debug "    Recipe: %s" (car dep)))))))

test/jest/install/Eask

@@ -37,6 +37,10 @@
   ;;(depends-on "msgu" :vc "https://github.com/jcs-elpa/msgu")
   )
 
+;; Try out
+(depends-on "indent-control" :try)
+(depends-on "auto-rename-tag" :try "https://raw.githubusercontent.com/emacs-vs/auto-rename-tag/refs/heads/master/auto-rename-tag.el")
+
 ;; Recipe install
 (depends-on "watch-cursor"
             :repo "jcs-elpa/watch-cursor" :fetcher 'github)