Cirrus: Only upload tagged releases

Prior to this commit, every push to master had it's builds packaged and
uploaded to google storage.  This is a waste, since potential users
are only ever concerned about tagged releases.

Unfortunately because the release process involves humans with
potentially multiple human and automation steps happening in parallel,
it's easy for automation to not detect a tagged release, or trigger on
development|pre-release tags.

Fix this in `upload_release_archive.sh` using a new unit-tested
function `is_release()`.  This acts as the definitive authority
on whether or not a specific commit rage or `$CIRRUS_TAG` value
constitutes something worthy of upload.

Signed-off-by: Chris Evich <cevich@redhat.com>

1 files changed, 37 insertions, 1 deletions

diff --git a/contrib/cirrus/lib.sh b/contrib/cirrus/lib.sh
index 8a7d3c1a3..051157702 100644
--- a/contrib/cirrus/lib.sh
+++ b/contrib/cirrus/lib.sh
@@ -43,7 +43,7 @@ if type -P git &> /dev/null && [[ -d "$GOSRC/.git" ]]
 then
     CIRRUS_CHANGE_IN_REPO=${CIRRUS_CHANGE_IN_REPO:-$(git show-ref --hash=8 HEAD || date +%s)}
 else # pick something unique and obviously not from Cirrus
-    CIRRUS_CHANGE_IN_REPO=${CIRRUS_CHANGE_IN_REPO:-no_git_$(date +%s)}
+    CIRRUS_CHANGE_IN_REPO=${CIRRUS_CHANGE_IN_REPO:-unknown_$(date +%s)}
 fi
 
 # Defaults when not running under CI
@@ -233,6 +233,42 @@ ircmsg() {
     set -e
 }
 
+# This covers all possible human & CI workflow parallel & serial combinations
+# where at least one caller must definitively discover if within a commit range
+# there is at least one release tag not having any '-' characters (return 0)
+# or otherwise (return non-0).
+is_release() {
+    req_env_var CIRRUS_BASE_SHA CIRRUS_CHANGE_IN_REPO
+    local range="${CIRRUS_BASE_SHA}..${CIRRUS_CHANGE_IN_REPO}"
+    # Easy check first, default non-useful values
+    if echo "${range}$CIRRUS_TAG" | grep -iq 'unknown'; then
+        die 11 "is_release() unusable range ${range} or tag $CIRRUS_TAG"
+    fi
+    # Next easy check, is CIRRUS_TAG set
+    unset RELVER
+    if [[ -n "$CIRRUS_TAG" ]]; then
+        RELVER="$CIRRUS_TAG"
+    else # Lastly, look through the range for tags
+        git fetch --all --tags &> /dev/null|| \
+            die 12 "is_release() failed to fetch tags"
+        RELVER=$(git log --pretty='format:%d' $range | \
+                 grep '(tag:' | sed -r -e 's/\s+[(]tag:\s+(v[0-9].*)[)]/\1/' | \
+                 sort -uV | tail -1)
+        [[ "$?" -eq "0" ]] || \
+            die 13 "is_release() failed to parse tags"
+    fi
+    echo "Found \$RELVER $RELVER"
+    if [[ -n "$RELVER" ]]; then
+        if echo "$RELVER" | grep -q '-'; then
+            return 2
+        else
+            return 0
+        fi
+    else
+        return 1
+    fi
+}
+
 setup_rootless() {
     req_env_var ROOTLESS_USER GOSRC SECRET_ENV_RE ROOTLESS_ENV_RE