bug#60832: Acknowledgement ([PATCH] sh-script.el: Use sh-indent-for-continuation to indent line continuations.)

[Philippe Altherr <philippe.altherr@gmail.com>]

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Here is an updated patch that includes a test case. I was able to test it
in my *scratch* buffer. Please double-check that it works as intended.


On Sun, Jan 15, 2023 at 3:14 PM GNU bug Tracking System <
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From 2cea437f1f35772e660031d1bcc0ed7ec25b8803 Mon Sep 17 00:00:00 2001
From: Philippe Altherr <philippe.altherr@gmail.com>
Date: Sat, 14 Jan 2023 05:22:26 +0100
Subject: [PATCH] For line continuations, use sh-indent-for-continuation
 instead of sh-basic-offset.

---
 lisp/progmodes/sh-script.el            |  7 +++++--
 test/lisp/progmodes/sh-script-tests.el | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/lisp/progmodes/sh-script.el b/lisp/progmodes/sh-script.el
index 17c22ff475..741803a517 100644
--- a/lisp/progmodes/sh-script.el
+++ b/lisp/progmodes/sh-script.el
@@ -2010,7 +2010,7 @@ sh-smie--indent-continuation
       (forward-line -1)
       (if (sh-smie--looking-back-at-continuation-p)
           (current-indentation)
-        (+ (current-indentation) sh-basic-offset))))
+        (+ (current-indentation) (sh-var-value 'sh-indent-for-continuation)))))
    (t
     ;; Just make sure a line-continuation is indented deeper.
     (save-excursion
@@ -2031,7 +2031,10 @@ sh-smie--indent-continuation
                        ;; check the line before that one.
                        (> ci indent))
                       (t ;Previous line is the beginning of the continued line.
-                       (setq indent (min (+ ci sh-basic-offset) max))
+                       (setq
+                        indent
+                        (min
+                         (+ ci (sh-var-value 'sh-indent-for-continuation)) max))
                        nil)))))
           indent))))))
 
diff --git a/test/lisp/progmodes/sh-script-tests.el b/test/lisp/progmodes/sh-script-tests.el
index c850a5d8af..52c1303c41 100644
--- a/test/lisp/progmodes/sh-script-tests.el
+++ b/test/lisp/progmodes/sh-script-tests.el
@@ -52,6 +52,24 @@ test-basic-sh-indentation
 (ert-deftest test-indentation ()
   (ert-test-erts-file (ert-resource-file "sh-indents.erts")))
 
+(ert-deftest test-indent-after-continuation ()
+  (with-temp-buffer
+    (insert "for f \\\nin a; do \\\ntoto; \\\ndone\n")
+    (shell-script-mode)
+    (let ((sh-indent-for-continuation '++))
+      (let ((sh-indent-after-continuation t))
+        (indent-region (point-min) (point-max))
+        (should (equal (buffer-string)
+                       "for f \\\n\tin a; do \\\n    toto; \\\n    done\n")))
+      (let ((sh-indent-after-continuation 'always))
+        (indent-region (point-min) (point-max))
+        (should (equal (buffer-string)
+                       "for f \\\n\tin a; do \\\n\ttoto; \\\n\tdone\n")))
+      (let ((sh-indent-after-continuation nil))
+        (indent-region (point-min) (point-max))
+        (should (equal (buffer-string)
+                       "for f \\\nin a; do \\\n    toto; \\\ndone\n"))))))
+
 (defun test-sh-back (string &optional pos)
   (with-temp-buffer
     (shell-script-mode)
-- 
2.39.1