fixed previous tag and commit id (#36)

Signed-off-by: burakberkkeskin <[email protected]>

.github/workflows/build-release.yml

@@ -23,9 +23,9 @@ jobs:
           git config user.name "GitHub Actions"
           git config user.email "[email protected]"
           git fetch --tags --force
-          previousTag=$(git tag --sort=-v:refname | grep -v '\-beta' | grep -v '\-alpha' | head -n 1 | tail -n 1)
+          previousTag=$(git tag --sort=-v:refname | grep -v '\-beta' | grep -v '\-alpha' | head -n 2 | tail -n 1)
           version=$(git describe --tags --abbrev=0)
-          commitId=$(git rev-parse --short $version)
+          commitId=$(git --no-pager log -1 --oneline | awk '{print $1}')
           releaseBinary=true
           if [[ "${version}" == *"beta"* || "${version}" == *"alpha"* ]]; then
             echo "Tag contains beta or alpha, skipping release."

README.md

@@ -19,7 +19,7 @@ You can build the `gomtp` locally, on your own machine.
 
 ```bash
 version=$(git describe --tags --abbrev=0) && \
-commitId=$(git rev-parse --short $version) && \
+commitId=$(git --no-pager log -1 --oneline | awk '{print $1}') && \
 go build -ldflags "-X gomtp/cmd.version=$version -X gomtp/cmd.commitId=$commitId" -o gomtp -v .
 ```