├── README.markdown
└── bin
    ├── compile
    ├── detect
    └── release


/README.markdown:
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 1 | # Crystal Heroku Buildpack
 2 | 
 3 | You can create an app in Heroku with Crystal's buildpack by running the
 4 | following command:
 5 | 
 6 | ```bash
 7 | $ heroku create myapp --buildpack https://github.com/zamith/heroku-buildpack-crystal.git
 8 | ```
 9 | 
10 | In order for the buildpack to work properly you should have a `shard.yml`
11 | file, as it is how it will detect that your app is a Crystal app.
12 | 
13 | To learn more about using custom buildpacks in Heroku, read [their docs](https://devcenter.heroku.com/articles/third-party-buildpacks#using-a-custom-buildpack).
14 | 
15 | ## Older versions of Crystal
16 | 
17 | If you have and older version of Crystal (`<= 0.9`), that uses the old
18 | `Projectfile` way of handling dependencies, you can use
19 | [version 1.0](https://github.com/zamith/heroku-buildpack-crystal/tree/v1.0.0) of
20 | the buildpack.
21 | 


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/bin/compile:
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 1 | #!/bin/bash
 2 | 
 3 | # YAML parser from https://gist.github.com/pkuczynski/8665367
 4 | parse_yaml() {
 5 |    local prefix=$2
 6 |    local s='[[:space:]]*' w='[a-zA-Z0-9_]*' fs=$(echo @|tr @ '\034')
 7 |    sed -ne "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
 8 |         -e "s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p"  $1 |
 9 |    awk -F$fs '{
10 |       indent = length($1)/2;
11 |       vname[indent] = $2;
12 |       for (i in vname) {if (i > indent) {delete vname[i]}}
13 |       if (length($3) > 0) {
14 |          vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
15 |          printf("%s%s%s=\"%s\"\n", "'$prefix'",vn, $2, $3);
16 |       }
17 |    }'
18 | }
19 | 
20 | BUILD_DIR=$1
21 | CACHE_DIR=$2
22 | ENV_DIR=$3
23 | CRYSTAL_URL="https://github.com/crystal-lang/crystal/releases/download/0.15.0/crystal-0.15.0-1-linux-x86_64.tar.gz"
24 | CRYSTAL_DIR=/tmp/crystal
25 | unset GIT_DIR
26 | 
27 | # Install Crystal
28 | echo "-----> Installing Crystal"
29 | mkdir -p $CRYSTAL_DIR
30 | curl -sL $CRYSTAL_URL | tar xz -C $CRYSTAL_DIR --strip-component=1
31 | 
32 | # Build the project
33 | cd $BUILD_DIR
34 | 
35 | if [ -f shard.yml ]; then
36 |   echo "-----> Installing Dependencies"
37 |   $CRYSTAL_DIR/bin/crystal deps
38 | 
39 |   if [ -f app.cr ]; then
40 |     printf "-----> DEPRECATED: Your main file should have the name of your shard and not app.cr.\nCompiling app.cr"
41 |     $CRYSTAL_DIR/bin/crystal build app.cr --release
42 |   else
43 |     eval $(parse_yaml shard.yml "shard_")
44 |     echo "-----> Compiling src/${shard_name}.cr (auto-detected from shard.yml)"
45 |     $CRYSTAL_DIR/bin/crystal build src/${shard_name}.cr --release -o app
46 |   fi
47 | else
48 |   printf "-----> DEPRECATED: You are using an old version of the dependency manager, please look at https://github.com/ysbaddaden/shards for information on the currently advised method.\nCompiling app.cr"
49 |   $CRYSTAL_DIR/bin/crystal build app.cr --release
50 | fi
51 | 
52 | 


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/bin/detect:
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1 | #!/bin/bash
2 | 
3 | if [ -f $1/shard.yml ]; then
4 |   echo "Crystal"
5 |   exit 0
6 | else
7 |   exit 1
8 | fi
9 | 


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/bin/release:
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1 | #!/bin/sh
2 | 
3 | cat << EOF
4 | ---
5 | addons:
6 | default_process_types:
7 |   web: ./app --port \$PORT
8 | EOF
9 | 


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