Fix Git version assumption

Author: tianon

Dockerfile.template

@@ -3,6 +3,7 @@ FROM alpine:3.12
 {{ if env.version == "devel" then ( -}}
 # https://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel
 ENV _BASH_COMMIT {{ .commit.version }}
+# {{ .commit.description }}
 ENV _BASH_VERSION devel-{{ .version }}
 {{ ) else ( -}}
 # https://ftp.gnu.org/gnu/bash/?C=M;O=D

versions.sh

@@ -48,16 +48,17 @@ for version in "${versions[@]}"; do
 		if timestamp="$(sed -rne '/.*[[:space:]]+bash-([0-9]+)[[:space:]]+.*/s//\1/p' <<<"$desc")" && [ -n "$timestamp" ]; then
 			: # "commit bash-20210305 snapshot"
 		else
-			timestamp="$(git -C "$tmp/devel" log --max-count=1 --format='format:%as' "$commit")"
+			timestamp="$(git -C "$tmp/devel" log --max-count=1 --format='format:%aI' "$commit")" # ideally we'd use "%as" and just axe "-" but that requires newer Git than Debian 10 has /o\
+			timestamp="${timestamp%%T*}"
 			timestamp="${timestamp//-/}"
 		fi
 
 		echo "$version: $commit ($timestamp -- $desc)"
 
-		export commit timestamp
+		export commit timestamp desc
 		json="$(jq <<<"$json" -c '.[env.version] = {
 			version: env.timestamp,
-			commit: { version: env.commit },
+			commit: { version: env.commit, description: env.desc },
 		}')"
 		continue
 	fi