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lint: formatting: Gracefully handle relative file names.

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Fixes <https://bugs.gnu.org/42543>.
Reported by Jack Hill <jackhill@jackhill.us>.

* guix/lint.scm (check-formatting): Always return a list (previously we
would return #f when 'search-path' returns #f).  Check whether
LOCATION's file is a relative file name.  Return a warning if not.
* tests/guix-lint.sh: Add test.
This commit is contained in:
Ludovic Courtès 2020-08-23 22:48:19 +02:00
parent 68193624d1
commit d10474c38d
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GPG key ID: 090B11993D9AEBB5
2 changed files with 25 additions and 8 deletions
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20
guix/lint.scm
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@ -1355,12 +1355,20 @@ (define (check-formatting package)
"Check the formatting of the source code of PACKAGE."
(let ((location (package-location package)))
(if location
(and=> (search-path %load-path (location-file location))
(lambda (file)
;; Report issues starting from the line before the 'package'
;; form, which usually contains the 'define' form.
(report-formatting-issues package file
(- (location-line location) 1))))
;; Report issues starting from the line before the 'package'
;; form, which usually contains the 'define' form.
(let ((line (- (location-line location) 1)))
(match (search-path %load-path (location-file location))
((? string? file)
(report-formatting-issues package file line))
(#f
;; It could be that LOCATION lists a "true" relative file
;; name--i.e., not relative to an element of %LOAD-PATH.
(let ((file (location-file location)))
(if (file-exists? file)
(report-formatting-issues package file line)
(list (make-warning package
(G_ "source file not found"))))))))
'())))

13
tests/guix-lint.sh
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@ -22,8 +22,11 @@
guix lint --version
module_dir="t-guix-lint-$$"
mkdir "$module_dir"
# Choose a module directory not below any %LOAD-PATH component. This is
# necessary when testing '-L' with a relative file name.
module_dir="$(mktemp -d)"
mkdir -p "$module_dir"
trap "rm -rf $module_dir" EXIT
@ -87,3 +90,9 @@ then false; else true; fi
# Make sure specifying multiple packages works.
guix lint -L $module_dir -c inputs-should-be-native dummy dummy@42 dummy
# Test '-L' with a relative file name. 'guix lint' will see "t-xyz/foo.scm"
# (instead of "foo.scm") and will thus fail to find it in %LOAD-PATH. Check
# that it does find it anyway. See <https://bugs.gnu.org/42543>.
(cd "$module_dir"/.. ; guix lint -c formatting -L "$(basename "$module_dir")" dummy@42) 2>&1 > "$module_dir/out"
test -z "$(cat "$module_dir/out")"