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Instead, this patch keeps the original behavior of 'current-source-directory' macro and adds optional 'follow-symlinks?' argument to it. ;;; Copyright © 2024 Nigko Yerden * guix/utils.scm (absolute-dirname): Add 'follow-symlinks?' mandatory argument. (%guix-source-root-directory): Pass #f to 'absolute-dirname' 'follow-symlinks?' argument. (current-source-directory): Add 'follow-symlinks?' optional argument. * guix/gexp.scm (local-file): Pass #t to 'current-source-directory' 'follow-symlinks?' argument. * tests/gexp.scm ("local-file, load through symlink"): New test. Change-Id: Ieb30101275deb56b7436df444f9bc21d240fba59 --- Hello Florian, pelzflorian (Florian Pelz) wrote: >> * tests/gexp.scm ("local-file, load through symlink"): New test. > >This one is a good test; but it tests only half, namely the >rare-in-practice case of `local-file' when loading a Scheme file. Here, >`current-source-directory' evaluate file-name to >"/tmp/guix-directory.VxrxZT/dir/link-to-code.scm", which has a slash as >prefix, so absolute-dirname is not called. Thanks for noticing this. Indeed 'absolute-dirname' was not called. I have fixed this by turning 'code.scm' into a module 'test-local-file.scm' and loading it twice: first using 'use-module' and then via 'load' (for some unclear reason 'primitive-load' causes an error here, so I replaced it with 'load'). >Thanks for the credit, but it would be unusual to mention me in the >commit message, where discussion does not count. >Please do not put me in the commit message; I made no code contribution. OK, I removed your name from the commit message. Regards, Nigko guix/gexp.scm | 2 +- guix/utils.scm | 53 ++++++++++++++++++++++++++++---------------------- tests/gexp.scm | 33 +++++++++++++++++++++++++++++++ 3 files changed, 64 insertions(+), 24 deletions(-) diff --git a/guix/gexp.scm b/guix/gexp.scm index 74b4c49f90..5911ca4815 100644 --- a/guix/gexp.scm +++ b/guix/gexp.scm @@ -508,7 +508,7 @@ (define-syntax local-file (string? (syntax->datum #'file)) ;; FILE is a literal, so resolve it relative to the source directory. #'(%local-file file - (delay (absolute-file-name file (current-source-directory))) + (delay (absolute-file-name file (current-source-directory #t))) rest ...)) ((_ (assume-valid-file-name file) rest ...) ;; FILE is not a literal, so resolve it relative to the current diff --git a/guix/utils.scm b/guix/utils.scm index d8ce6ed886..ea3d80707e 100644 --- a/guix/utils.scm +++ b/guix/utils.scm @@ -1110,41 +1110,48 @@ (define (canonical-newline-port port) (define (%guix-source-root-directory) "Return the source root directory of the Guix found in %load-path." - (dirname (absolute-dirname "guix/packages.scm"))) + (dirname (absolute-dirname "guix/packages.scm" #f))) (define absolute-dirname ;; Memoize to avoid repeated 'stat' storms from 'search-path'. - (mlambda (file) + (mlambda (file follow-symlinks?) "Return the absolute name of the directory containing FILE, or #f upon -failure." +failure. Follow symlinks if FOLLOW-SYMLINKS? is true." (match (search-path %load-path file) (#f #f) ((? string? file) - ;; If there are relative names in %LOAD-PATH, FILE can be relative and - ;; needs to be canonicalized. - (if (string-prefix? "/" file) - (dirname file) - (canonicalize-path (dirname file))))))) + (if follow-symlinks? + (dirname (canonicalize-path file)) + ;; If there are relative names in %LOAD-PATH, FILE can be relative + ;; and needs to be canonicalized. + (if (string-prefix? "/" file) + (dirname file) + (canonicalize-path (dirname file)))))))) (define-syntax current-source-directory (lambda (s) "Return the absolute name of the current directory, or #f if it could not -be determined." +be determined. Do not follow symlinks if FOLLOW-SYMLINKS? is false (the default)." + (define (source-directory follow-symlinks?) + (match (assq 'filename (or (syntax-source s) '())) + (('filename . (? string? file-name)) + ;; If %FILE-PORT-NAME-CANONICALIZATION is 'relative, then FILE-NAME + ;; can be relative. In that case, we try to find out at run time + ;; the absolute file name by looking at %LOAD-PATH; doing this at + ;; run time rather than expansion time is necessary to allow files + ;; to be moved on the file system. + (if (string-prefix? "/" file-name) + (dirname (if follow-symlinks? + (canonicalize-path file-name) + file-name)) + #`(absolute-dirname #,file-name #,follow-symlinks?))) + ((or ('filename . #f) #f) + ;; raising an error would upset Geiser users + #f))) (syntax-case s () - ((_) - (match (assq 'filename (or (syntax-source s) '())) - (('filename . (? string? file-name)) - ;; If %FILE-PORT-NAME-CANONICALIZATION is 'relative, then FILE-NAME - ;; can be relative. In that case, we try to find out at run time - ;; the absolute file name by looking at %LOAD-PATH; doing this at - ;; run time rather than expansion time is necessary to allow files - ;; to be moved on the file system. - (if (string-prefix? "/" file-name) - (dirname file-name) - #`(absolute-dirname #,file-name))) - ((or ('filename . #f) #f) - ;; raising an error would upset Geiser users - #f)))))) + ((_) (source-directory #f)) + ((_ follow-symlinks?) + (source-directory (syntax->datum #'follow-symlinks?)))))) ;;; diff --git a/tests/gexp.scm b/tests/gexp.scm index b35bfc920f..8f267214cd 100644 --- a/tests/gexp.scm +++ b/tests/gexp.scm @@ -292,6 +292,39 @@ (define %extension-package (equal? (scandir (string-append dir "/tests")) '("." ".." "gexp.scm")))))) +(test-assert "local-file, load through symlink" + ;; See . + (call-with-temporary-directory + (lambda (tmp-dir) + (chdir tmp-dir) + ;; create content file + (call-with-output-file "content" + (lambda (port) (display "Hi!" port))) + ;; Create module that call 'local-file' + ;; with the content file and returns its + ;; absolute file-name. An error is raised + ;; if the content file can't be found. + (call-with-output-file "test-local-file.scm" + (lambda (port) (display "\ +(define-module (test-local-file) + #:use-module (guix gexp)) +(define file (local-file \"content\" \"test-file\")) +(local-file-absolute-file-name file)" port))) + (mkdir "dir") + (chdir "dir") + (symlink "../test-local-file.scm" "test-local-file.scm") + ;; 'local-file' in turn calls 'current-source-directory' + ;; which has an 'if' branching condition depending on whether + ;; 'file-name' is absolute or relative path. To test both + ;; of these branches we execute 'test-local-file.scm' symlink + ;; first as a module (corresponds to relative path): + (eval (begin + (add-to-load-path ".") + (use-modules (test-local-file))) + (current-module)) + ;; and then as a regular code (corresponds to absolute path): + (load (string-append tmp-dir "/dir/test-local-file.scm"))))) + (test-assert "one plain file" (let* ((file (plain-file "hi" "Hello, world!")) (exp (gexp (display (ungexp file)))) base-commit: 4c49cd171e2aa06af05cf52403050b18f100867a -- 2.45.2