Github cli - Adds retry logic for find git tags (#310)

* Github cli - Adds retry logic for find git tags

* re-add set -e

* address comment

1 files changed, 88 insertions, 0 deletions

diff --git a/test/github-cli/test.sh b/test/github-cli/test.sh
index a419c34..58df559 100755
--- a/test/github-cli/test.sh
+++ b/test/github-cli/test.sh
@@ -8,5 +8,93 @@ source dev-container-features-test-lib
 # Definition specific tests
 check "version" gh  --version
 
+find_version_from_git_tags() {
+    local variable_name=$1
+    local requested_version=${!variable_name}
+    if [ "${requested_version}" = "none" ]; then return; fi
+    local repository=$2
+    local prefix=${3:-"tags/v"}
+    local separator=${4:-"."}
+    local last_part_optional=${5:-"false"}    
+    if [ "$(echo "${requested_version}" | grep -o "." | wc -l)" != "2" ]; then
+        local escaped_separator=${separator//./\\.}
+        local last_part
+        if [ "${last_part_optional}" = "true" ]; then
+            last_part="(${escaped_separator}[0-9]+)?"
+        else
+            last_part="${escaped_separator}[0-9]+"
+        fi
+        local regex="${prefix}\\K[0-9]+${escaped_separator}[0-9]+${last_part}$"
+        local version_list="$(git ls-remote --tags ${repository} | grep -oP "${regex}" | tr -d ' ' | tr "${separator}" "." | sort -rV)"
+        if [ "${requested_version}" = "latest" ] || [ "${requested_version}" = "current" ] || [ "${requested_version}" = "lts" ]; then
+            declare -g ${variable_name}="$(echo "${version_list}" | head -n 1)"
+        else
+            set +e
+            declare -g ${variable_name}="$(echo "${version_list}" | grep -E -m 1 "^${requested_version//./\\.}([\\.\\s]|$)")"
+            set -e
+        fi
+    fi
+    if [ -z "${!variable_name}" ] || ! echo "${version_list}" | grep "^${!variable_name//./\\.}$" > /dev/null 2>&1; then
+        echo -e "Invalid ${variable_name} value: ${requested_version}\nValid values:\n${version_list}" >&2
+        exit 1
+    fi
+    echo "${variable_name}=${!variable_name}"
+}
+
+find_prev_version_from_git_tags() {
+    local variable_name=$1
+    local current_version=${!variable_name}
+    local repository=$2
+    # Normally a "v" is used before the version number, but support alternate cases
+    local prefix=${3:-"tags/v"}
+    # Some repositories use "_" instead of "." for version number part separation, support that
+    local separator=${4:-"."}
+    # Some tools release versions that omit the last digit (e.g. go)
+    local last_part_optional=${5:-"false"}
+    # Some repositories may have tags that include a suffix (e.g. actions/node-versions)
+    local version_suffix_regex=$6
+    # Try one break fix version number less if we get a failure. Use "set +e" since "set -e" can cause failures in valid scenarios.
+    set +e
+    major="$(echo "${current_version}" | grep -oE '^[0-9]+' || echo '')"
+    minor="$(echo "${current_version}" | grep -oP '^[0-9]+\.\K[0-9]+' || echo '')"
+    breakfix="$(echo "${current_version}" | grep -oP '^[0-9]+\.[0-9]+\.\K[0-9]+' 2>/dev/null || echo '')"
+
+    if [ "${minor}" = "0" ] && [ "${breakfix}" = "0" ]; then
+        ((major=major-1))
+        declare -g ${variable_name}="${major}"
+        # Look for latest version from previous major release
+        find_version_from_git_tags "${variable_name}" "${repository}" "${prefix}" "${separator}" "${last_part_optional}"
+    # Handle situations like Go's odd version pattern where "0" releases omit the last part
+    elif [ "${breakfix}" = "" ] || [ "${breakfix}" = "0" ]; then
+        ((minor=minor-1))
+        declare -g ${variable_name}="${major}.${minor}"
+        # Look for latest version from previous minor release
+        find_version_from_git_tags "${variable_name}" "${repository}" "${prefix}" "${separator}" "${last_part_optional}"
+    else
+        ((breakfix=breakfix-1))
+        if [ "${breakfix}" = "0" ] && [ "${last_part_optional}" = "true" ]; then
+            declare -g ${variable_name}="${major}.${minor}"
+        else 
+            declare -g ${variable_name}="${major}.${minor}.${breakfix}"
+        fi
+    fi
+}
+
+CLI_VERSION="2.20.0"
+find_prev_version_from_git_tags CLI_VERSION https://github.com/cli/cli
+check "pre-version-to-2.20.0" bash -c "echo ${CLI_VERSION} | grep '2.19.0'"
+
+CLI_VERSION="2.18.1"
+find_prev_version_from_git_tags CLI_VERSION https://github.com/cli/cli
+check "pre-version-to-2.18.1" bash -c "echo ${CLI_VERSION} | grep '2.18.0'"
+
+CLI_VERSION="2.15.0"
+find_prev_version_from_git_tags CLI_VERSION https://github.com/cli/cli
+check "pre-version-to-2.15.0" bash -c "echo ${CLI_VERSION} | grep '2.14.7'"
+
+CLI_VERSION="2.0.0"
+find_prev_version_from_git_tags CLI_VERSION https://github.com/cli/cli
+check "pre-version-to-2.0.0" bash -c "echo ${CLI_VERSION} | grep '1.14.0'"
+
 # Report result
 reportResults
\ No newline at end of file