_bin: add script go-mod-tip.sh

The go-mod-tip shell script get and print the latest Go module
version based on the last tag and the latest commit hash from the
current working directory.

This command usually used to fix go.mod due to force commit.

1 files changed, 33 insertions, 0 deletions

diff --git a/_bin/go-mod-tip.sh b/_bin/go-mod-tip.sh
new file mode 100755
index 00000000..b581a6c2
--- /dev/null
+++ b/_bin/go-mod-tip.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+## Script to get and print the latest Go module version based on the last tag
+## and the latest commit hash from current working git directory.
+##
+## For example, if the last tag is v0.39.1 and the latest commit hash is
+## 38f9f1fb1ebc,
+##
+##	$ gomod-latest.sh
+##	commit timestamp: 1658864676
+##	github.com/shuLhan/share v0.39.1-0.20220726194436-38f9f1fb1ebc
+##
+## This command usually used to fix go.mod due to force commit.
+
+MODNAME=$(go list -m)
+COMMIT_TS=$(git log -n 1 --pretty=format:'%at')
+DATE=$(date -u --date="@${COMMIT_TS}" +%Y%m%d%H%M%S)
+HASH=$(git log -n 1 --pretty=format:'%h' --abbrev=12)
+TAG=$(git describe --abbrev=0 --tags 2>/dev/null)
+PREFIX=
+
+echo "commit timestamp: ${COMMIT_TS}"
+
+if [[ "${TAG}" == "" ]]; then
+	TAG="v0.0.0"
+else
+	IFS=. read MAJOR MINOR PATCH <<<"${TAG}"
+	PATCH=$((PATCH+1))
+	TAG=${MAJOR}.${MINOR}.${PATCH}
+	PREFIX=0.
+fi
+
+echo ${MODNAME} ${TAG}-${PREFIX}${DATE}-${HASH}