added rustle script

bin/rustle.sh

@@ -0,0 +1,112 @@
+# Allows you to change code and see what the rust compiler does immediately in the opposite pane
+
+# Instructions:
+# - ./rustle.sh
+# - select a rustling, see the split pane view show up
+# - update until you have the solution, or you get sick of being stuck..
+# - kill the tmux session (Prefix : kill-session)
+# - do it all over again
+
+# Built-in niceties:
+# - checks you have everything, gives you hints where to get it
+# - runs either the 'cargo run' or 'cargo test' based on if the code contains test code or not (naive)
+# - override default editor with the EDITOR variable iow:
+#     EDITOR="emacs-or-vim -some-switches" ./rustle.sh
+# - Should work on anything that has a recent bash (4.3.38 >=)
+#
+function urldecode() {
+    local url_encoded="${1//+/ }"
+    result=$(printf '%b' "${url_encoded//%/\\x}")
+    echo -e "${result##*code=}"
+}
+
+function dependency-check() {
+    dependency=$1
+    contingency=${2:-""}
+    if [ "$(which $dependency)" == "" ]; then
+	echo "${dependency} not installed ${contingency}"
+	exit 1
+    else
+	echo "${dependency} is installed!"
+    fi
+}
+
+function init() {
+    # Check for dependencies, create workdir
+    declare -A deps
+    deps[tmux]="- download tmux for your distro, or compile likaboss. (https://github.com/tmux/tmux)"
+    deps[entr]="- download from (http://entrproject.org/)"
+    deps[cargo]="- via rustup (https://www.rustup.rs/)"
+    deps[rustc]="- via rustup (https://www.rustup.rs/)"
+    for dependency in ${!deps[@]}; do
+	contingency=${deps[${dependency}]}
+	dependency-check ${dependency} "${contingency}"
+    done
+    WORKDIR=$PWD/rustlings
+    if [ -d $WORKDIR ];
+    then
+	rm -fr $WORKDIR
+    fi
+    mkdir -p $WORKDIR
+
+    cd $WORKDIR
+}
+
+
+
+function extract-code-from-markdown() {
+    # extracts the rust code from the markdown url via urldecode function
+    grep -oP '\["[^"]+"\]\([^\)]+' ../../README.md | sed 's/["()[]//g'| sed 's/[]]/ /g' | while read -a matches;
+    do
+	filename=${matches[0]}
+	rustling=${filename%%.rs}
+	cargo new ${rustling} --bin
+	echo "$(urldecode ${matches[1]})" > ${rustling}/src/main.rs
+    done
+}
+
+
+function run-selection() {
+    selection=${1}
+    SESSION_NAME=${2}
+
+    tmux new-session -s ${SESSION_NAME} -d
+    tmux new-window -t ${SESSION_NAME}:1
+    tmux split-window -t ${SESSION_NAME}:1 -h
+    if [ "$(grep -R '\[test\]' ${selection}/src/*rs)" == "" ]; then
+	tmux send-keys -t ${SESSION_NAME}:1.1 "cd ${selection} && ls ./src/*rs |entr bash -c 'clear && cargo run'" C-m
+    else
+	tmux send-keys -t ${SESSION_NAME}:1.1 "cd ${selection} && ls ./src/*rs |entr bash -c 'clear && cargo test'" C-m
+    fi
+    tmux send-keys -t ${SESSION_NAME}:1.0 "${EDITOR} ${selection}/src/main.rs; ${QUIT_SESSION}" C-m
+    tmux select-pane -t ${SESSION_NAME}:1.0
+    tmux attach -t ${SESSION_NAME}    
+}
+
+function menu-selection() {
+    # Generate a menu
+    WORKDIR=${1}
+    EDITOR=${2:-nano}
+    PS3='Please enter your choice: '
+    declare -A options
+    for i in `ls -d ${WORKDIR}/*`;
+    do
+	key=${i##*/}
+	options[$key]=$(realpath $i);
+    done
+    
+    
+    keys=$(ls -d ${!options[@]})
+    select opt in $keys
+    do
+	selection=${options[$opt]}
+	echo "${opt}..${selection}"
+	run-selection $selection rustalisk # rustalisk is a working title, I'm a starcraft fan. (Zerglings? Rustlings? Hydralisks...")
+    done
+}
+
+
+
+init;
+extract-code-from-markdown;
+menu-selection $WORKDIR;