121 lines
No EOL
3.5 KiB
Bash
Executable file
121 lines
No EOL
3.5 KiB
Bash
Executable file
#!/usr/bin/env bash
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shopt -s extglob
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ACTION_INPUT_TOKEN="${ACTION_INPUT_TOKEN:?}"
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ACTION_INPUT_REPOSITORY="${ACTION_INPUT_REPOSITORY:?}"
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ACTION_INPUT_PATH="${ACTION_INPUT_PATH:?}"
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ACTION_INPUT_REF="${ACTION_INPUT_REF:?}"
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error() {
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echo "$*" 1>&2 ; exit 1;
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}
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# ensure we are in the right place
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[[ -z "${GITHUB_WORKSPACE:-}" ]] || { cd "${GITHUB_WORKSPACE}" || error ; }
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git config --global --add protocol.version 2
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git init -q "${ACTION_INPUT_PATH}" && { cd "${ACTION_INPUT_PATH}" || error ; }
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git config --local gc.auto 0
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# the server url and uri are important for determining the default checkout url
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GITHUB_SERVER_URL="${GITHUB_SERVER_URL:?}"
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GITHUB_SERVER_URI="${GITHUB_SERVER_URL//http?(s):\/\//}"
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# use https instead of everything else
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git config --add url."${GITHUB_SERVER_URL}/".insteadOf "git@${GITHUB_SERVER_URI}:"
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git config --add url."${GITHUB_SERVER_URL}/".insteadOf "ssh://git@${GITHUB_SERVER_URI}/"
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git config --add url."${GITHUB_SERVER_URL}/".insteadOf "git://${GITHUB_SERVER_URI}/"
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# prepare git config extra header for https auth
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BASE64="base64 --wrap 0"
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echo "" | ${BASE64} >/dev/null 2>&1 || BASE64="base64"
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echo "" | ${BASE64} >/dev/null 2>&1 || BASE64="openssl base64 -A"
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echo "" | ${BASE64} >/dev/null 2>&1
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GIT_HTTP_EXTRAHEADER="AUTHORIZATION: basic $(echo -n "x-access-token:${ACTION_INPUT_TOKEN}" | ${BASE64})"
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git config --local --add http."${GITHUB_SERVER_URL}".extraheader "${GIT_HTTP_EXTRAHEADER}"
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# add the repository as remote
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git remote add origin "${ACTION_INPUT_REPOSITORY}"
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git_default_refspec() {
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git ls-remote --symref origin HEAD | { read -r _ ref name ; echo "${ref}" ; }
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}
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git_resolve_refspec() {
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# shellcheck disable=SC2068
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git ls-remote origin $@ | { read -r sha ref _ ; echo "${sha} ${ref}" ; }
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}
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fetch() {
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# shellcheck disable=SC2068
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git fetch --no-tags --prune --no-recurse-submodules --depth=1 origin $@
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}
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checkout() {
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# shellcheck disable=SC2068
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git checkout --force $@
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}
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# the checkout is based on a commit hash
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if [[ ${ACTION_INPUT_REF:-} =~ ^[0-9a-f]{5,40}$ ]]
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then
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fetch "${ACTION_INPUT_REF}" && checkout "${ACTION_INPUT_REF}"
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exit
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fi
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# update selected ref when no input is given to remote default branch
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: "${ACTION_INPUT_REF:=$( git_default_refspec )}"
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# TODO: check if repo is workflow repo, if so, use commit sha from env
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# like GITHUB_REF and GITHUB_SHA
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read -r GIT_SHA GIT_REF _ <<< "$( git_resolve_refspec "${ACTION_INPUT_REF}" )"
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: "${GIT_SHA:?}" "${GIT_REF:?}"
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# we always use the refspec with the commit sha as source to prevent
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# race conditions when running on a frequently used branch
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checkout_head() {
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local name="${GIT_REF#refs\/heads\/}"
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local remote="refs/remotes/origin/${name}"
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fetch "+${GIT_SHA}:${remote}"
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checkout -B "${name}" "${remote}"
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}
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checkout_pull() {
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local name="${GIT_REF#refs\/pull\/}"
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local remote="refs/remotes/pull/${name}"
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fetch "+${GIT_SHA}:${remote}"
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# pull requests have a special treatment for the branch name. The name
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# is determined by the branch the pull request is targeting.
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local branch="${GITHUB_BASE_REF:-$( git_default_refspec )}"
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checkout -B "${branch#refs\/heads\/}" "${remote}"
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}
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checkout_tag() {
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local name="${GIT_REF#refs\/tags\/}"
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local remote="refs/tags/${name}"
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fetch "+${GIT_SHA}:${remote}"
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checkout "${remote}"
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}
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case "${GIT_REF}" in
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# heads and pull are a branch based checkout
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refs/heads/*) checkout_head ;;
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refs/pull/* ) checkout_pull ;;
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# tags are a detached head checkout
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refs/tags/* ) checkout_tag ;;
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*) error "ref type '${GIT_REF}' is unknown" ;;
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esac |