web: Do not temporarily checkout repository when serving it.

Now that snippet source texts are interred into the xapian index, the
web server does not need a repository checkout.

* bin/tissue (tissue-web): Do not temporarily checkout repositories
being served.
* tissue/web/server.scm (handler): Do not change into repository
directory.
* tissue/git.scm (call-with-temporary-checkouts): Delete function.
* .dir-locals.el (scheme-mode): Unregister it.

2 files changed, 28 insertions, 42 deletions

diff --git a/tissue/git.scm b/tissue/git.scm
index b67d65c..4289d65 100644
--- a/tissue/git.scm
+++ b/tissue/git.scm
@@ -48,8 +48,7 @@
             call-with-file-in-git
             file-modification-table
             clone-options
-            call-with-temporary-checkout
-            call-with-temporary-checkouts))
+            call-with-temporary-checkout))
 
 ;; We bind additional functions from libgit2 that are not already
 ;; bound in guile-git. TODO: Contribute them to guile-git.
@@ -223,14 +222,3 @@ checkout when PROC returns or exits non-locally."
      (proc temporary-checkout))
    ;; The system-dependent temporary directory
    (dirname (tmpnam))))
-
-(define (call-with-temporary-checkouts repositories proc)
-  "Call PROC with temporary checkouts of REPOSITORIES, and delete the
-checkouts when PROC returns or exits non-locally."
-  (match repositories
-    ((repository other-repositories ...)
-     (call-with-temporary-checkout repository
-       (lambda (checkout)
-         (call-with-temporary-checkouts other-repositories
-           (cut proc checkout <...>)))))
-    (() (proc))))
diff --git a/tissue/web/server.scm b/tissue/web/server.scm
index 43093f8..db89bae 100644
--- a/tissue/web/server.scm
+++ b/tissue/web/server.scm
@@ -157,35 +157,33 @@ See `start-web-server' for documentation of HOSTS."
     (log-request request)
     (parameterize ((%current-git-repository
                     (repository-open repository-directory)))
-      (call-with-current-directory repository-directory
-        (lambda ()
-          (cond
-           ;; Static files
-           ((let ((file-path
-                   (find file-exists?
-                         (map (cut string-append (assq-ref host-parameters 'website-directory) <>)
-                              (try-paths path)))))
-              (and file-path
-                   ;; Check that the file really is within the document
-                   ;; root.
-                   (string-prefix? (string-append (assq-ref host-parameters 'website-directory) "/")
-                                   (canonicalize-path file-path))
-                   (canonicalize-path file-path)))
-            => (lambda (file-path)
-                 (values `((content-type . ,(mime-type-for-extension
-                                             (file-name-extension file-path))))
-                         (call-with-input-file file-path
-                           get-bytevector-all))))
-           ;; Search page. We look for the search page only after files
-           ;; because we want to let files shadow the search page if
-           ;; necessary.
-           ((member path (list "/" "/search"))
-            (search-handler request body
-                            (assq-ref host-parameters 'xapian-directory)
-                            (assq-ref host-parameters 'project)))
-           ;; Not found
-           (else
-            (404-response request))))))))
+      (cond
+       ;; Static files
+       ((let ((file-path
+               (find file-exists?
+                     (map (cut string-append (assq-ref host-parameters 'website-directory) <>)
+                          (try-paths path)))))
+          (and file-path
+               ;; Check that the file really is within the document
+               ;; root.
+               (string-prefix? (string-append (assq-ref host-parameters 'website-directory) "/")
+                               (canonicalize-path file-path))
+               (canonicalize-path file-path)))
+        => (lambda (file-path)
+             (values `((content-type . ,(mime-type-for-extension
+                                         (file-name-extension file-path))))
+                     (call-with-input-file file-path
+                       get-bytevector-all))))
+       ;; Search page. We look for the search page only after files
+       ;; because we want to let files shadow the search page if
+       ;; necessary.
+       ((member path (list "/" "/search"))
+        (search-handler request body
+                        (assq-ref host-parameters 'xapian-directory)
+                        (assq-ref host-parameters 'project)))
+       ;; Not found
+       (else
+        (404-response request))))))
 
 (define (start-web-server socket-address hosts)
   "Start web server listening on SOCKET-ADDRESS.