Illustration for issue #20 at Constellation/escodegen

escodegen20.sh

#!/bin/bash

# Written in 2012 by Robert Gust-Bardon <http://robert.gust-bardon.org/>.

# To the extent possible under law, the author(s) have dedicated all copyright
# and related and neighboring rights to this software to the public domain
# worldwide. This software is distributed without any warranty.
#
# You should have received a copy of the CC0 Public Domain Dedication along
# with this software. If not, see
# <http://creativecommons.org/publicdomain/zero/1.0/>.

# Requires updating $ESPRIMA and $ESCODEGEN to appropriate paths.

# Tested under Ubuntu 12.04 LTS.

ESPRIMA="$HOME/github/ariya/esprima"
ESCODEGEN="$HOME/github/Constellation/escodegen"
TEMP="$(mktemp)"
cat <<'ENDH' > "$TEMP"
try{}//
finally{}
ENDH
node <<ENDH
var program = require('fs').readFileSync('$TEMP', 'utf8'),
    inspect = require('util').inspect,
    parse = require('$ESPRIMA/esprima').parse,
    options = {
        comment: true,
        range: true,
        loc: true,
        tokens: true,
        raw: true
    },
    escodegen =
        require('$ESCODEGEN/escodegen'),
    tree = parse(program, options),
    code;

console.log("#### The original program");
console.log(program);
console.log("#### The original tree");
console.log(inspect(tree, null, null));
tree = escodegen.attachComments(tree, tree.comments, tree.tokens);
console.log("#### The tree with comments attached");
console.log(inspect(tree, null, null));
code = escodegen.generate(tree, {comment: true});
console.log("#### Generated code");
console.log(code);
console.log("#### The tree for the generated code");
console.log(inspect(parse(code, options)));
ENDH
echo "#### Node version"
node -v
echo "#### Esprima version"
cd "$ESPRIMA"
git branch | grep '\*'
git log --pretty=oneline | head -1
echo "#### escodegen version"
cd "$ESCODEGEN"
git branch | grep '\*'
git log --pretty=oneline | head -1