124 lines
3 KiB
Bash
Executable file
124 lines
3 KiB
Bash
Executable file
#!/bin/sh
|
||
|
||
MIN_BAZEL_MAJOR=0
|
||
MIN_BAZEL_MINOR=24
|
||
|
||
set -e
|
||
|
||
check_files_dont_exist () {
|
||
if [ -e WORKSPACE ] || [ -e BUILD ] || [ -e BazelExample.hs ]
|
||
then
|
||
echo "Current directory already has WORKSPACE and/or BUILD and/or BazelExample.hs files." >/dev/stderr
|
||
exit 1
|
||
fi
|
||
}
|
||
|
||
check_bazel_version () {
|
||
local actual_raw=$(bazel version | egrep '^Build label:' | egrep -o '[0-9.]+')
|
||
|
||
IFS=. read actual_major actual_minor actual_patch <<EOF
|
||
$actual_raw
|
||
EOF
|
||
|
||
local expected=$MIN_BAZEL_MAJOR.$MIN_BAZEL_MINOR.0
|
||
local cmp=$expected'\n'$actual
|
||
|
||
if ! ( [ "$actual_major" -gt "$MIN_BAZEL_MAJOR" ] || (
|
||
[ "$actual_major" -eq "$MIN_BAZEL_MAJOR" ] &&
|
||
[ "$actual_minor" -ge "$MIN_BAZEL_MINOR" ] ) )
|
||
then
|
||
echo "Need at least Bazel v${expected}. v${actual_raw} detected." >/dev/stderr
|
||
exit 1
|
||
fi
|
||
}
|
||
|
||
check_files_dont_exist
|
||
check_bazel_version
|
||
|
||
cat > WORKSPACE <<"EOF"
|
||
# Give your project a name. :)
|
||
workspace(name = "YOUR_PROJECT_NAME_HERE")
|
||
|
||
# Load the repository rule to download an http archive.
|
||
load(
|
||
"@bazel_tools//tools/build_defs/repo:http.bzl",
|
||
"http_archive"
|
||
)
|
||
|
||
# Download `rules_haskell`.
|
||
# and make it accessible `@io_tweag_rules_haskell`.
|
||
http_archive(
|
||
name = "io_tweag_rules_haskell",
|
||
strip_prefix = "rules_haskell-0.8",
|
||
urls = ["https://github.com/tweag/rules_haskell/archive/v0.8.tar.gz"],
|
||
sha256 = "431d492a8ee6a110cdf42496181c9d27225dfb997379e64a148eb8e69f272ab7",
|
||
)
|
||
|
||
load(
|
||
"@io_tweag_rules_haskell//haskell:repositories.bzl",
|
||
"haskell_repositories"
|
||
)
|
||
|
||
# `haskell_repositories()` sets up all bazel dependencies
|
||
# required by `rules_haskell`.
|
||
haskell_repositories()
|
||
|
||
load(
|
||
"@io_tweag_rules_haskell//haskell:haskell.bzl",
|
||
"haskell_register_ghc_bindists",
|
||
)
|
||
|
||
# Registers a haskell toolchain with a GHC binary
|
||
# downloaded from haskell.org.
|
||
haskell_register_ghc_bindists(version = "8.6.4")
|
||
EOF
|
||
|
||
cat > BUILD.bazel <<"EOF"
|
||
# Set all target’s visibility in this package to "public".
|
||
package(default_visibility = ["//visibility:public"])
|
||
|
||
# Load `rules_haskell` rules.
|
||
load(
|
||
"@io_tweag_rules_haskell//haskell:haskell.bzl",
|
||
"haskell_toolchain_library",
|
||
"haskell_library",
|
||
"haskell_binary",
|
||
)
|
||
|
||
# `haskell_toolchain_library` can access builtin GHC packages
|
||
# and assign them a bazel target name, so that they
|
||
# can be referenced as dependencies.
|
||
haskell_toolchain_library(name = "base")
|
||
|
||
# You can add your own libraries with `haskell_library`.
|
||
# haskell_library(
|
||
# name = "MY_LIBRARY_NAME",
|
||
# src_strip_prefix = "src",
|
||
# srcs = glob(['src/**/*.hs']),
|
||
# deps = [
|
||
# "base_pkg"
|
||
# ],
|
||
# )
|
||
|
||
# An example binary using the Prelude module from the
|
||
# GHC base package, to print the hello world.
|
||
haskell_binary(
|
||
name = "example",
|
||
srcs = [":Example.hs"],
|
||
deps = [":base"],
|
||
)
|
||
EOF
|
||
|
||
cat > Example.hs <<"EOF"
|
||
module Main where
|
||
|
||
import Prelude (putStrLn)
|
||
|
||
main = putStrLn "Hello from rules_haskell!"
|
||
EOF
|
||
|
||
cat <<"EOF"
|
||
WORKSPACE and initial BUILD files created. To run Bazel and build the example:
|
||
|
||
$ bazel run //:example
|
||
EOF
|