feat: add better shell-like command support

You can now execute any kind of program in the PATH.
You do, however, need to specify "./" if you want to execute a local
file, but that shouldn't be too big a problem.

scripts/README.md

@@ -0,0 +1,3 @@
+# sci default scripts
+This directory contains some default scripts that may or may not be useful to you.
+Most of the scripts are fairly simple, but should be installed as part of the sci installation process.

scripts/git-clone-and-run-sci-sh.sh

@@ -1,8 +0,0 @@
-#!/bin/sh
-set -e
-echo ">>> cloning..."
-git clone $SCI_PIPELINE_URL $SCI_PIPELINE_NAME
-cd $SCI_PIPELINE_NAME
-
-echo ">>> running .sci.sh..."
-time sh .sci.sh

scripts/git-clone-and-sci.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -ex  # print all that we're doing (no need for echo's)
+tmpdir=$(mktemp -d)
+git clone --depth=1 --recurse-submodules --shallow-submodules -b $1 "$SCI_PIPELINE_URL" "$tmpdir"
+shift
+cd "$tmpdir"
+sh .sci.sh
+cd -

scripts/wget-and-sci.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+# NOTE: This script assumes that the url is a .tar.gz file.
+# TODO: check if $# is >= 1 and give a warning that the extract dir should be provided.
+set -ex  # print all that we're doing (no need for echo's)
+tmpdir=$(mktemp -d)
+wget "$SCI_PIPELINE_URL" -P "$tmpdir"
+cd "$tmpdir"
+tar xf *.tar.gz
+cd $1
+sh .sci.sh
+cd -
+rm -rf "$tmpdir"