Install gcc, gfortran and clang on linux

images/linux/scripts/installers/clang.sh

@@ -1,31 +1,77 @@
 #!/bin/bash
 ################################################################################
-##  File:  example.sh
-##  Desc:  This is an example script that can be copied to add a new software
-##         installer to the image
+##  File:  clang.sh
+##  Desc:  Installs Clang compiler (versions: 6, 8 and 9)
 ################################################################################
 
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/document.sh
 source $HELPER_SCRIPTS/apt.sh
 
-wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
-apt-add-repository "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-6.0 main"
-apt-get update
-apt-get install -y clang-6.0 lldb-6.0 lld-6.0
+function InstallClang6_0 {
+    wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
+    apt-add-repository "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-6.0 main"
+    apt-get update
+    apt-get install -y clang-6.0 lldb-6.0 lld-6.0
 
-update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-6.0 100
-update-alternatives --install /usr/bin/clang clang /usr/bin/clang-6.0 100
+    # Run tests to determine that the software installed as expected
+    echo "Testing to make sure that script performed as expected, and basic scenarios work"
+    for cmd in clang-6.0 clang++-6.0; do
+        if ! command -v $cmd; then
+            echo "$cmd was not installed"
+            exit 1
+        fi
+    done
 
-# Run tests to determine that the software installed as expected
-echo "Testing to make sure that script performed as expected, and basic scenarios work"
-for cmd in clang clang++ clang-6.0 clang++-6.0; do
-    if ! command -v $cmd; then
-        echo "$cmd was not installed"
-        exit 1
-    fi
+    # Document what was added to the image
+    echo "Lastly, documenting what we added to the metadata file"
+    DocumentInstalledItem "Clang 6.0 ($(clang-6.0 --version | head -n 1 | cut -d ' ' -f 3 | cut -d '-' -f 1))"
+}
+
+function InstallClang {
+    version=$1
+
+    echo "Installing clang-$version..."
+    ./llvm.sh $version
+
+    # Run tests to determine that the software installed as expected
+    echo "Testing to make sure that script performed as expected, and basic scenarios work"
+    for cmd in clang-$version clang++-$version; do
+        if ! command -v $cmd; then
+            echo "$cmd was not installed"
+            exit 1
+        fi
+    done
+
+    # Document what was added to the image
+    echo "Documenting clang-$version..."
+    DocumentInstalledItem "Clang $version ($(clang-$version --version | head -n 1 | cut -d ' ' -f 3 | cut -d '-' -f 1))"
+}
+
+# Install Clang compiler
+apt-get update -y
+
+# Clang 6.0 is not supported by automatic installation script (`llvm.sh`)
+# Thus we have to install it explicitly
+InstallClang6_0
+
+# Download script for automatic installation
+wget https://apt.llvm.org/llvm.sh
+chmod +x llvm.sh
+
+# Install Clang 8 and 9
+versions=(
+    "8"
+    "9"
+)
+
+for version in ${versions[*]}
+do
+    InstallClang $version
 done
 
-# Document what was added to the image
-echo "Lastly, documenting what we added to the metadata file"
-DocumentInstalledItem "Clang 6.0 ($(clang-6.0 --version | head -n 1 | sed 's/~/\\~/g'))"
+rm llvm.sh
+
+# Make Clang 9 default
+update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-9 100
+update-alternatives --install /usr/bin/clang clang /usr/bin/clang-9 100