1 files changed, 35 insertions, 0 deletions
diff --git a/hadrian/build.sh b/hadrian/build.sh
new file mode 100755
index 0000000000..ad502b3c49
--- /dev/null
+++ b/hadrian/build.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# readlink on os x, doesn't support -f, to prevent the
+# need of installing coreutils (e.g. through brew, just
+# for readlink, we use the follownig substitute.
+#
+# source: http://stackoverflow.com/a/1116890
+function rl {
+    TARGET_FILE="$1"
+
+    cd "$(dirname "$TARGET_FILE")"
+    TARGET_FILE="$(basename "$TARGET_FILE")"
+
+    # Iterate down a (possible) chain of symlinks
+    while [ -L "$TARGET_FILE" ]
+    do
+        TARGET_FILE="$(readlink "$TARGET_FILE")"
+        cd "$(dirname "$TARGET_FILE")"
+        TARGET_FILE="$(basename "$TARGET_FILE")"
+    done
+
+    # Compute the canonicalized name by finding the physical path
+    # for the directory we're in and appending the target file.
+    PHYS_DIR="$(pwd -P)"
+    RESULT="$PHYS_DIR/$TARGET_FILE"
+    echo "$RESULT"
+}
+
+root="$(dirname "$(rl "$0")")"
+
+# By default on Linux/MacOS we build Hadrian using Cabal
+chmod a+x "$root/build.cabal.sh"
+(. "$root/build.cabal.sh" "$@")