From ee18ee16642b850dd413b9fac77d698ff6c82b9e Mon Sep 17 00:00:00 2001
From: Adrien Ferrand <ferrand.ad@gmail.com>
Date: Thu, 25 Jul 2019 12:20:33 +0200
Subject: [PATCH] Add logic

---
 .../letsencrypt-auto.template                 | 10 ++++-
 .../pieces/bootstrappers/rpm_python3.sh       |  7 ----
 .../bootstrappers/rpm_python3_legacy.sh       | 42 +++++++++++++++++++
 3 files changed, 51 insertions(+), 8 deletions(-)
 create mode 100644 letsencrypt-auto-source/pieces/bootstrappers/rpm_python3_legacy.sh

diff --git a/letsencrypt-auto-source/letsencrypt-auto.template b/letsencrypt-auto-source/letsencrypt-auto.template
index c064580bd..923b10c7b 100755
--- a/letsencrypt-auto-source/letsencrypt-auto.template
+++ b/letsencrypt-auto-source/letsencrypt-auto.template
@@ -298,6 +298,7 @@ DeterminePythonVersion() {
 {{ bootstrappers/deb_common.sh }}
 {{ bootstrappers/rpm_common_base.sh }}
 {{ bootstrappers/rpm_common.sh }}
+{{ bootstrappers/rpm_python3_legacy.sh }}
 {{ bootstrappers/rpm_python3.sh }}
 {{ bootstrappers/suse_common.sh }}
 {{ bootstrappers/arch_common.sh }}
@@ -336,7 +337,14 @@ elif [ -f /etc/redhat-release ]; then
   if [ "$RPM_DIST_NAME" = "fedora" ]; then
     RPM_DIST_VERSION=`(. /etc/os-release 2> /dev/null && echo $VERSION_ID) || echo "0"`
   fi
-  if [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 -o "$PYVER" -eq 26 ]; then
+  if [ "$PYVER" -eq 26 ]; then
+    Bootstrap() {
+      BootstrapMessage "Legacy RedHat-based OSes that will use Python3"
+      BootstrapRpmPython3Legacy
+    }
+    USE_PYTHON_3=1
+    BOOTSTRAP_VERSION="BootstrapRpmPython3Legacy $BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION"
+  elif [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 -o "$PYVER" -eq 26 ]; then
     Bootstrap() {
       BootstrapMessage "RedHat-based OSes that will use Python3"
       BootstrapRpmPython3
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3.sh b/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3.sh
index f33b07ca9..ac0553db5 100644
--- a/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3.sh
+++ b/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3.sh
@@ -4,7 +4,6 @@ BOOTSTRAP_RPM_PYTHON3_VERSION=1
 
 BootstrapRpmPython3() {
   # Tested with:
-  #   - CentOS 6
   #   - Fedora 29
 
   InitializeRPMCommonBase
@@ -15,12 +14,6 @@ BootstrapRpmPython3() {
       python3-virtualenv
       python3-devel
     "
-  # EPEL uses python34
-  elif $TOOL list python34 >/dev/null 2>&1; then
-    python_pkgs="python34
-      python34-devel
-      python34-tools
-    "
   else
     error "No supported Python package available to install. Aborting bootstrap!"
     exit 1
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3_legacy.sh b/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3_legacy.sh
new file mode 100644
index 000000000..49b4b2b59
--- /dev/null
+++ b/letsencrypt-auto-source/pieces/bootstrappers/rpm_python3_legacy.sh
@@ -0,0 +1,42 @@
+# If new packages are installed by BootstrapRpmPython3 below, this version
+# number must be increased.
+BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION=1
+
+BootstrapRpmPython3Legacy() {
+
+  InitializeRPMCommonBase
+
+  if ! $TOOL list rh-python36 >/dev/null 2>&1; then
+    echo "To use Certbot, packages from the SCL repository need to be installed."
+    if ! $TOOL list centos-release-scl >/dev/null 2>&1; then
+      error "Enable the SCL repository and try running Certbot again."
+      exit 1
+    fi
+    if [ "$ASSUME_YES" = 1 ]; then
+      /bin/echo -n "Enabling the SCL repository in 3 seconds..."
+      sleep 1s
+      /bin/echo -ne "\e[0K\rEnabling the SCL repository in 2 seconds..."
+      sleep 1s
+      /bin/echo -e "\e[0K\rEnabling the SCL repository in 1 second..."
+      sleep 1s
+    fi
+    if ! $TOOL install $YES_FLAG $QUIET_FLAG centos-release-scl; then
+      error "Could not enable SCL. Aborting bootstrap!"
+      exit 1
+    fi
+  fi
+
+  # CentOS 6 must use rh-python36 from SCL
+  if $TOOL list python3-virtualenv >/dev/null 2>&1; then
+    python_pkgs="rh-python36
+    "
+  else
+    error "No supported Python package available to install. Aborting bootstrap!"
+    exit 1
+  fi
+
+  # Insert the SCL specific path in PATH to resolve the correct virtualenv binary from SCL
+  PATH="/opt/rh/rh-python36/root/usr/bin:$PATH"
+
+  BootstrapRpmCommonBase "$python_pkgs"
+}