Merge pull request #174 from bgilbert/fixes

Clarify error if we don't find the container ABI flag

.github/ISSUE_TEMPLATE/release.md

@@ -6,4 +6,5 @@
 - [ ] Verify that CI creates a [GitHub release](https://github.com/openslide/openslide-bin/releases/) with artifacts
 - [ ] Update website: `_data/releases.yaml`, maybe `_includes/news.md`
 - [ ] Possibly send mail to -announce and -users
+- [ ] Possibly post to [forum.image.sc](https://forum.image.sc/c/announcements/10)
 - [ ] Update `WINBUILD_RELEASE` in [OpenSlide Python CI](https://github.com/openslide/openslide-python/blob/main/.github/workflows/python.yml)

build.sh

@@ -431,7 +431,9 @@ updates() {
 probe() {
     # Probe the build environment and set up variables
     if [ ! -e /etc/openslide-winbuild-builder-v1 ] && [ ! -e /etc/openslide-winbuild-builder-v2 ]; then
-        echo "Must run inside the builder container.  See README.md."
+        echo "Not running in a compatible builder container.  Either build.sh isn't running"
+        echo "in the container (see instructions in README.md) or the container image is too"
+        echo "old or too new."
         exit 1
     fi
 

builder/linux/Dockerfile

@@ -1,5 +1,7 @@
 # Use a Linux distro with an older glibc for maximum compatibility
 FROM quay.io/almalinuxorg/almalinux:8
+# NOTE: try to keep the current container image compatible with the latest
+# stable source release, so people can conveniently build from the source zip
 RUN touch /etc/openslide-linux-builder-v1
 RUN dnf -y upgrade && \
     dnf -y install 'dnf-command(config-manager)' epel-release && \

builder/windows/Dockerfile

@@ -1,4 +1,6 @@
 FROM docker.io/gentoo/stage3:latest
+# NOTE: try to keep the current container image compatible with the latest
+# stable source release, so people can conveniently build from the source zip
 RUN touch /etc/openslide-winbuild-builder-v2
 RUN echo 'FEATURES="-sandbox -usersandbox -ipc-sandbox -network-sandbox -pid-sandbox"' >> /etc/portage/make.conf
 COPY package.accept_keywords /etc/portage/package.accept_keywords/cross