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brew: check system-provided curl and git on Linux

Set HOMEBREW_FORCE_BREWED_CURL or HOMEBREW_FORCE_BREWED_GIT if the system-provided versions are missing or outdated, causing either to be installed on the next `brew update`.
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EricFromCanada committed Oct 26, 2018
1 parent 7c9bea2 commit 7aa995693479992a76e19a15132843d6fdf765f5
Showing with 28 additions and 2 deletions.
  1. +28 −2 Library/Homebrew/brew.sh
@@ -55,6 +55,12 @@ git() {
"$HOMEBREW_LIBRARY/Homebrew/shims/scm/git" "$@"
}

numeric() {
# Condense the exploded argument into a single return value.
# shellcheck disable=SC2086,SC2183
printf "%01d%02d%02d%02d" ${1//./ }
}

HOMEBREW_VERSION="$(git -C "$HOMEBREW_REPOSITORY" describe --tags --dirty --abbrev=7 2>/dev/null)"
HOMEBREW_USER_AGENT_VERSION="$HOMEBREW_VERSION"
if [[ -z "$HOMEBREW_VERSION" ]]
@@ -114,6 +120,25 @@ else
: "${HOMEBREW_OS_VERSION:=$(uname -r)}"
HOMEBREW_OS_USER_AGENT_VERSION="$HOMEBREW_OS_VERSION"

# Ensure the system Curl is a version that supports modern HTTPS certificates.
HOMEBREW_MINIMUM_CURL_VERSION="7.41.0"
system_curl_version_output="$($(command -v curl) --version 2>/dev/null)"
system_curl_name_and_version="${system_curl_version_output%% (*}"
if [[ $(numeric "${system_curl_name_and_version##* }") -lt $(numeric "$HOMEBREW_MINIMUM_CURL_VERSION") ]]
then
HOMEBREW_SYSTEM_CURL_TOO_OLD="1"
HOMEBREW_FORCE_BREWED_CURL="1"
fi

# Ensure the system Git is at or newer than the minimum required version.
# Git 2.7.4 is the version of git on Ubuntu 16.04 LTS (Xenial Xerus).
HOMEBREW_MINIMUM_GIT_VERSION="2.7.0"
system_git_version_output="$($(command -v git) --version 2>/dev/null)"
if [[ $(numeric "${system_git_version_output##* }") -lt $(numeric "$HOMEBREW_MINIMUM_GIT_VERSION") ]]
then
HOMEBREW_FORCE_BREWED_GIT="1"
fi

CACHE_HOME="${XDG_CACHE_HOME:-${HOME}/.cache}"
HOMEBREW_CACHE="${HOMEBREW_CACHE:-${CACHE_HOME}/Homebrew}"
HOMEBREW_SYSTEM_TEMP="/tmp"
@@ -153,8 +178,9 @@ else
fi

HOMEBREW_USER_AGENT="$HOMEBREW_PRODUCT/$HOMEBREW_USER_AGENT_VERSION ($HOMEBREW_SYSTEM; $HOMEBREW_PROCESSOR $HOMEBREW_OS_USER_AGENT_VERSION)"
HOMEBREW_CURL_VERSION="$("$HOMEBREW_CURL" --version 2>/dev/null | head -n1 | awk '{print $1"/"$2}')"
HOMEBREW_USER_AGENT_CURL="$HOMEBREW_USER_AGENT $HOMEBREW_CURL_VERSION"
curl_version_output="$("$HOMEBREW_CURL" --version 2>/dev/null)"
curl_name_and_version="${curl_version_output%% (*}"
HOMEBREW_USER_AGENT_CURL="$HOMEBREW_USER_AGENT ${curl_name_and_version// //}"

# Declared in bin/brew
export HOMEBREW_BREW_FILE

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