104 lines
3.4 KiB
Bash
Executable File
104 lines
3.4 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
|
|
# Exit immediately if the script encounters a non-zero status.
|
|
set -e
|
|
|
|
# If set, Bash includes filenames beginning with a `.` in the results of
|
|
# filename expansion. The filenames `.` and `..` must always be matched
|
|
# explicitly, even if dotglob is set.
|
|
shopt -s dotglob
|
|
|
|
# ============================================================
|
|
# PROLOGUE
|
|
# ============================================================
|
|
|
|
# Create a new top-level directory as fallback in case $BUILD (defined below)
|
|
# is ever empty.
|
|
mkdir -p "/tmp/bs.phoenix"
|
|
|
|
# Create an intermediate build directory. The final step of this script will
|
|
# copy the content from this directory to $OUT.
|
|
BUILD=$(mktemp -d -p "/tmp/bs.phoenix")
|
|
|
|
if [ -z "$BUILD" ]; then
|
|
>&2 echo "Failed to create temp directory."
|
|
exit 1
|
|
fi
|
|
|
|
# Deletes the intermediate build directory on exit. We use a concatenation of
|
|
# the intermediate directory with the basename of the generated temp directory
|
|
# to ensure we never evaluate to root (i.e. `/`). That should never actually
|
|
# happen but a good habit to establish nonetheless.
|
|
function cleanup {
|
|
rm -r "/tmp/bs.phoenix/$(basename "$BUILD")"
|
|
}
|
|
|
|
trap cleanup EXIT
|
|
|
|
# ============================================================
|
|
# ENVIRONMENT
|
|
# ============================================================
|
|
|
|
if [ -z "$MODULE" ]; then
|
|
MODULE_ARG=
|
|
else
|
|
MODULE_ARG="--module '$MODULE'"
|
|
fi
|
|
|
|
# ============================================================
|
|
# BUILD
|
|
# ============================================================
|
|
|
|
# Copy template contents over to the intermediate build directory.
|
|
cp -r template/* "$BUILD"
|
|
|
|
# Explicitly set permissions on all copied files.
|
|
find "$BUILD" -type f -execdir chmod 644 {} +
|
|
find "$BUILD" -type d -execdir chmod 755 {} +
|
|
|
|
# Generate a new project with the specified name using `mix`. Generate in a
|
|
# subdirectory to avoid interactive conflict resolution.
|
|
nix develop "$BUILD" \
|
|
--command bash \
|
|
-c "mix phx.new $BUILD/project --app '$APP' $MODULE_ARG"
|
|
|
|
# Copy the generated files into the intermediate build directory.
|
|
mv -f "$BUILD"/project/* "$BUILD"
|
|
rmdir "$BUILD"/project
|
|
|
|
# Overwrite the generated README in favor of that defined in our template.
|
|
cp template/README.md "$BUILD"
|
|
chmod 644 "$BUILD"/README.md
|
|
|
|
# Replace the template name found in the flake.nix file. The mix generator would
|
|
# fail if $APP did not consist of just lowercase ASCII letters, numbers, or
|
|
# underscores. Thus $APP is safe to interpolate into the following command.
|
|
sed -i "s/<APP_NAME>/$APP/g" "$BUILD/flake.nix"
|
|
|
|
# By default Phoenix generates a postgres configuration with assumed username
|
|
# `postgres`. This flake encourages a local postgres database with username
|
|
# `$(whoami)`. Reflect this in the config.
|
|
sed -i "s/username: \"postgres\"/username: \"$(whoami)\"/g" "$BUILD/config/dev.exs"
|
|
|
|
# Create a new database cluster.
|
|
nix develop "$BUILD" --command bash -c "pg_ctl initdb -D $BUILD/data"
|
|
|
|
# Append an additional rule to `.gitignore` to ignore the database cluster.
|
|
cat <<EOF >> "$BUILD"/.gitignore
|
|
# The default location of the generated database cluster.
|
|
/data/
|
|
|
|
# Directory used by \`direnv\` to hold \`use flake\`-generated profiles.
|
|
/.direnv/
|
|
|
|
# A symlink produced by default when running \`nix build\`.
|
|
/result
|
|
EOF
|
|
|
|
# ============================================================
|
|
# EPILOGUE
|
|
# ============================================================
|
|
|
|
# Success! Copy contents to target directory.
|
|
cp -r "$BUILD"/* "$OUT"
|