1 files changed, 134 insertions, 0 deletions
diff --git a/src/ci/shared.sh b/src/ci/shared.sh
new file mode 100644
index 000000000..8a88c5619
--- /dev/null
+++ b/src/ci/shared.sh
@@ -0,0 +1,134 @@
+#!/bin/false
+# shellcheck shell=bash
+
+# This file is intended to be sourced with `. shared.sh` or
+# `source shared.sh`, hence the invalid shebang and not being
+# marked as an executable file in git.
+
+export MIRRORS_BASE="https://ci-mirrors.rust-lang.org/rustc"
+
+# See https://unix.stackexchange.com/questions/82598
+# Duplicated in docker/dist-various-2/shared.sh
+function retry {
+  echo "Attempting with retry:" "$@"
+  local n=1
+  local max=5
+  while true; do
+    "$@" && break || {
+      if [[ $n -lt $max ]]; then
+        sleep $n  # don't retry immediately
+        ((n++))
+        echo "Command failed. Attempt $n/$max:"
+      else
+        echo "The command has failed after $n attempts."
+        return 1
+      fi
+    }
+  done
+}
+
+function isCI {
+    [[ "${CI-false}" = "true" ]] || isGitHubActions
+}
+
+function isGitHubActions {
+    [[ "${GITHUB_ACTIONS-false}" = "true" ]]
+}
+
+
+function isSelfHostedGitHubActions {
+    [[ "${RUST_GHA_SELF_HOSTED-false}" = "true" ]]
+}
+
+function isMacOS {
+    [[ "${OSTYPE}" = "darwin"* ]]
+}
+
+function isWindows {
+    [[ "${OSTYPE}" = "cygwin" ]] || [[ "${OSTYPE}" = "msys" ]]
+}
+
+function isLinux {
+    [[ "${OSTYPE}" = "linux-gnu" ]]
+}
+
+function isCiBranch {
+    if [[ $# -ne 1 ]]; then
+        echo "usage: $0 <branch-name>"
+        exit 1
+    fi
+    name="$1"
+
+    if isGitHubActions; then
+        [[ "${GITHUB_REF}" = "refs/heads/${name}" ]]
+    else
+        echo "isCiBranch only works inside CI!"
+        exit 1
+    fi
+}
+
+function ciBaseBranch {
+    if isGitHubActions; then
+        echo "${GITHUB_BASE_REF#refs/heads/}"
+    else
+        echo "ciBaseBranch only works inside CI!"
+        exit 1
+    fi
+}
+
+function ciCommit {
+    if isGitHubActions; then
+        echo "${GITHUB_SHA}"
+    else
+        echo "ciCommit only works inside CI!"
+        exit 1
+    fi
+}
+
+function ciCheckoutPath {
+    if isGitHubActions; then
+        echo "${GITHUB_WORKSPACE}"
+    else
+        echo "ciCheckoutPath only works inside CI!"
+        exit 1
+    fi
+}
+
+function ciCommandAddPath {
+    if [[ $# -ne 1 ]]; then
+        echo "usage: $0 <path>"
+        exit 1
+    fi
+    path="$1"
+
+    if isGitHubActions; then
+        echo "${path}" >> "${GITHUB_PATH}"
+    else
+        echo "ciCommandAddPath only works inside CI!"
+        exit 1
+    fi
+}
+
+function ciCommandSetEnv {
+    if [[ $# -ne 2 ]]; then
+        echo "usage: $0 <name> <value>"
+        exit 1
+    fi
+    name="$1"
+    value="$2"
+
+    if isGitHubActions; then
+        echo "${name}=${value}" >> "${GITHUB_ENV}"
+    else
+        echo "ciCommandSetEnv only works inside CI!"
+        exit 1
+    fi
+}
+
+function releaseChannel {
+    if [[ -z "${RUST_CI_OVERRIDE_RELEASE_CHANNEL+x}" ]]; then
+        cat "${ci_dir}/channel"
+    else
+        echo $RUST_CI_OVERRIDE_RELEASE_CHANNEL
+    fi
+}