test against released Coq 8.7; update CI

.gitlab-ci.yml

 image: ralfjung/opam-ci:latest
 
+stages:
+  - build
+
 variables:
   CPU_CORES: "9"
 
 .template: &template
+  stage: build
   tags:
   - fp-timing
   script:
@@ -23,17 +27,17 @@ variables:
   - master
   - /^ci/
 
-build-coq.8.7:
+build-coq.8.7.0:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.7.dev   coq-mathcomp-ssreflect version dev"
+    OPAM_PINS: "coq version 8.7.0   coq-mathcomp-ssreflect version 1.6.2"
   except:
   - triggers
 
 build-coq.8.6.1:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.6.1   coq-mathcomp-ssreflect version 1.6.1"
+    OPAM_PINS: "coq version 8.6.1   coq-mathcomp-ssreflect version 1.6.2"
     VALIDATE: "1"
   artifacts:
     paths:
@@ -45,6 +49,6 @@ build-coq.8.6.1:
 build-iris.dev:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.6.1   coq-mathcomp-ssreflect version 1.6.1   coq-iris.dev git https://gitlab.mpi-sws.org/FP/iris-coq.git#$IRIS_REV"
+    OPAM_PINS: "coq version 8.7.0   coq-mathcomp-ssreflect version 1.6.2   coq-iris.dev git https://gitlab.mpi-sws.org/FP/iris-coq.git#$IRIS_REV"
   only:
   - triggers

README.md

@@ -6,8 +6,8 @@ Atomicity related verification based on Iris logic.
 
 This version is known to compile with:
 
- - Coq 8.6.1
- - Ssreflect 1.6.1
+ - Coq 8.6.1 / 8.7.0
+ - Ssreflect 1.6.2
  - A development version of [Iris](https://gitlab.mpi-sws.org/FP/iris-coq/)
 
 The easiest way to install the correct versions of the dependencies is through

build/opam-ci.sh

 #!/bin/bash
 set -e
+set -x
 ## This script installs the build dependencies for CI builds.
-function run_and_print() {
-    echo "$ $@"
-    "$@"
-}
 
 # Prepare OPAM configuration
 export OPAMROOT="$(pwd)/opamroot"
@@ -12,32 +9,27 @@ export OPAMJOBS="$((2*$CPU_CORES))"
 export OPAM_EDITOR="$(which false)"
 
 # Make sure we got a good OPAM.
-test -d "$OPAMROOT" || (mkdir "$OPAMROOT" && run_and_print opam init --no-setup -y)
+test -d "$OPAMROOT" || (mkdir "$OPAMROOT" && opam init --no-setup -y)
 eval `opam conf env`
 
 # Make sure the pin for the builddep package is not stale.
-run_and_print make build-dep/opam
+make build-dep/opam
 
 # Update repositories
-if test $(find "$OPAMROOT/repo/package-index" -mtime +0); then
-    # last update was more than a day ago
-    run_and_print opam update
-else
-    # only update iris-dev, and only if it already exists
-    if test -d "$OPAMROOT/repo/iris-dev"; then run_and_print opam update iris-dev; fi
-fi
+opam update
+
 # Make sure we got the right set of repositories registered
-if echo "$@" | fgrep "dev"; then
+if echo "$@" | fgrep "dev" > /dev/null; then
     # We are compiling against a dev version of something.  Get ourselves the dev repositories.
-    test -d "$OPAMROOT/repo/coq-extra-dev" || run_and_print opam repo add coq-extra-dev https://coq.inria.fr/opam/extra-dev -p 0
-    test -d "$OPAMROOT/repo/coq-core-dev" || run_and_print opam repo add coq-core-dev https://coq.inria.fr/opam/core-dev -p 5
+    test -d "$OPAMROOT/repo/coq-extra-dev" || opam repo add coq-extra-dev https://coq.inria.fr/opam/extra-dev -p 0
+    test -d "$OPAMROOT/repo/coq-core-dev" || opam repo add coq-core-dev https://coq.inria.fr/opam/core-dev -p 5
 else
     # No dev version, make sure we do not have the dev repositories.
-    test -d "$OPAMROOT/repo/coq-extra-dev" && run_and_print opam repo remove coq-extra-dev
-    test -d "$OPAMROOT/repo/coq-core-dev" && run_and_print opam repo remove coq-core-dev
+    test -d "$OPAMROOT/repo/coq-extra-dev" && opam repo remove coq-extra-dev
+    test -d "$OPAMROOT/repo/coq-core-dev" && opam repo remove coq-core-dev
 fi
-test -d "$OPAMROOT/repo/coq-released" || run_and_print opam repo add coq-released https://coq.inria.fr/opam/released -p 10
-test -d "$OPAMROOT/repo/iris-dev" || run_and_print opam repo add iris-dev https://gitlab.mpi-sws.org/FP/opam-dev.git -p 20
+test -d "$OPAMROOT/repo/coq-released" || opam repo add coq-released https://coq.inria.fr/opam/released -p 10
+test -d "$OPAMROOT/repo/iris-dev" || opam repo add iris-dev https://gitlab.mpi-sws.org/FP/opam-dev.git -p 20
 echo
 
 # We really want to run all of the following in one opam transaction, but due to opam limitations,
@@ -56,14 +48,14 @@ while (( "$#" )); do # while there are arguments left
         echo "[opam-ci] $PACKAGE already $KIND-pinned to $VERSION"
     else
         echo "[opam-ci] $KIND-pinning $PACKAGE to $VERSION"
-        run_and_print opam pin add -y -k "$KIND" "$PACKAGE" "$VERSION"
+        opam pin add -y -k "$KIND" "$PACKAGE" "$VERSION"
     fi
 done
 
 # Upgrade cached things.
 echo
 echo "[opam-ci] Upgrading opam"
-run_and_print opam upgrade -y
+opam upgrade -y --fixup
 
 # Install build-dependencies.
 echo