Merge pull request #386 from SaschaMann/julia

Add Julia 1.3.1

images/linux/scripts/installers/julia.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+################################################################################
+##  File:  julia.sh
+##  Desc:  Installs Julia, and adds Julia to the path
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/document.sh
+
+# This function fetches the latest Julia release from the GitHub API
+# Based on https://gist.github.com/lukechilds/a83e1d7127b78fef38c2914c4ececc3c
+function GetLatestJuliaRelease () {
+    curl --silent "https://api.github.com/repos/julialang/julia/releases/latest" |
+    grep '"tag_name":' |
+    sed -E 's/.*"([^"]+)".*/\1/' |
+    sed 's/v//' # remove v prefix
+}
+
+
+# This function installs Julia using the specified arguments:
+#   $1=MajorAndMinorVersion (1.3.1)
+#   $2=IsDefaultVersion (true or false)
+
+function InstallJulia () {
+    # Extract Major and Minor version from full version string
+    juliaMajorAndMinorVersion="$(sed 's/\.[^.]*$//' <<< $1)"
+
+    curl -sL "https://julialang-s3.julialang.org/bin/linux/x64/$juliaMajorAndMinorVersion/julia-$1-linux-x86_64.tar.gz" -o "julia-$1-linux-x86_64.tar.gz"
+    mkdir -p "/usr/local/julia$juliaMajorAndMinorVersion"
+    tar -C "/usr/local/julia$juliaMajorAndMinorVersion" -xzf "julia-$1-linux-x86_64.tar.gz" --strip-components=1 julia
+    rm "julia-$1-linux-x86_64.tar.gz"
+
+    # If this version of Julia is to be the default version,
+    # symlink it into the path
+    if [ "$2" = true ]; then
+        ln -s "/usr/local/julia$juliaMajorAndMinorVersion/bin/julia" /usr/bin/julia
+    fi
+
+    # Run tests to determine that the software installed as expected
+    echo "Testing to make sure that script performed as expected, and basic scenarios work"
+
+    # If this version of Julia is to be the default version,
+    # check that it has been added to PATH
+    if [ "$2" = true ]; then
+        if ! command -v julia; then
+            echo "Julia was not installed or found on PATH"
+            exit 1
+        fi
+    fi
+
+    # Verify output of julia --version
+    if [ ! "$(/usr/local/julia"$juliaMajorAndMinorVersion"/bin/julia --version)" = "julia version $1" ]; then
+        echo "Julia was not installed correctly"
+        exit 1
+    fi
+
+    # Document what was added to the image
+    echo "Lastly, documenting what we added to the metadata file"
+    DocumentInstalledItem "Julia ($(julia --version))"
+}
+
+InstallJulia "$(GetLatestJuliaRelease)" true