[bug#69291] [PATCH 3/5] scripts: substitute: Replace some leave calls with raise.

[Christopher Baines <mail@cbaines.net>]

These calls happen inside of with-error-handling, so the effect should be the
same, but this opens up the possibility of using this code in a program that
doesn't want to exit when one of these error conditions is met.

Change-Id: I15d963615d85d419559fa0f4333fa4dc1dfbfd3b

* guix/scripts/substitute.scm (download-nar, process-substitution): Use raise
formatted-message rather than leave.

Change-Id: Idd0880206b69e3903e19e0536b87d65a52c200d5
---
 guix/scripts/substitute.scm | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm
index 575fa2a0b3..1875a4332d 100755
--- a/guix/scripts/substitute.scm
+++ b/guix/scripts/substitute.scm
@@ -495,8 +495,10 @@ (define* (download-nar narinfo destination
                          #:keep-alive? #t
                          #:buffered? #f))))
       (else
-       (leave (G_ "unsupported substitute URI scheme: ~a~%")
-              (uri->string uri)))))
+       (raise
+        (formatted-message
+         (G_ "unsupported substitute URI scheme: ~a~%")
+         (uri->string uri))))))
 
   (define (try-fetch choices)
     (match choices
@@ -511,9 +513,11 @@ (define* (download-nar narinfo destination
                      (G_ "Downloading ~a...~%") (uri->string uri)))
            (values port uri compression download-size))))
       (()
-       (leave (G_ "no valid nar URLs for ~a at ~a~%")
-              (narinfo-path narinfo)
-              (narinfo-uri-base narinfo)))))
+       (raise
+        (formatted-message
+         (G_ "no valid nar URLs for ~a at ~a~%")
+         (narinfo-path narinfo)
+         (narinfo-uri-base narinfo))))))
 
   ;; Delete DESTINATION first--necessary when starting over after a failed
   ;; download.
@@ -678,8 +682,10 @@ (define* (process-substitution port store-item destination
                         (cut valid-narinfo? <> acl))))
 
   (unless narinfo
-    (leave (G_ "no valid substitute for '~a'~%")
-           store-item))
+    (raise
+     (formatted-message
+      (G_ "no valid substitute for '~a'~%")
+      store-item)))
 
   (guard (c ((network-error? c)
              (when (http-get-error? c)
-- 
2.41.0