makepkg: Better error messages for versions in (check, make, opt)depends/provides/conflicts

Given the depends

    depends=('foo>=1.2-1.par2')

and the error message

    ==> ERROR: pkgver in depends is not allowed to contain colons, forward slashes, hyphens or whitespace.

One would be lead to believe that the problem is that they gave a pkgrel in
depends at all, not that the pkgrel contains letters.

Each of the (check,make,opt)depends, conflicts, and provides linters use a
glob to trim off properly formed epoch an rel from the full version string,
and pass the remainder to check_pkgver().  This does a good job of
accepting/rejecting full versions, but doesn't do a good job of generating
good error messages when rejecting if it's because of the epoch or rel.

1. Factor out check_epoch() and check_pkgrel() from lint_epoch() and
   lint_pkgrel(), similarly to check_pkgver().
2. Add a check_fullpkgver() that takes a full [epoch:]ver[-rel] string and
   splits it in to epoch/ver/rel, and calls the appropriate check_ function
   on each.
3. Use check_fullpkgver() in the {,check,make,opt}depends, conflicts, and
   provides linters.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/scripts/libmakepkg/lint_pkgbuild/epoch.sh.in b/scripts/libmakepkg/lint_pkgbuild/epoch.sh.in
index 93bd05c1..c98f91b0 100644
--- a/scripts/libmakepkg/lint_pkgbuild/epoch.sh.in
+++ b/scripts/libmakepkg/lint_pkgbuild/epoch.sh.in
@@ -29,9 +29,15 @@ source "$LIBRARY/util/message.sh"
 lint_pkgbuild_functions+=('lint_epoch')
 
 
-lint_epoch() {
+check_epoch() {
+	local epoch=$1 type=$2
+
 	if [[ $epoch != *([[:digit:]]) ]]; then
-		error "$(gettext "%s must be an integer, not %s.")" "epoch" "$epoch"
+		error "$(gettext "%s must be an integer, not %s.")" "epoch${type:+ in $type}" "$epoch"
 		return 1
 	fi
 }
+
+lint_epoch() {
+	check_epoch "$epoch"
+}