scripts/emsdk-shell — sigil-web-repl

1#!/usr/bin/env bash

2#

3# emsdk-shell - Run commands in an Emscripten environment on Guix

4#

5# This script creates an FHS-compatible container with emsdk available.

6# emsdk is installed to ~/.emsdk/emsdk and persists between invocations.

7#

8# Usage:

9# ./scripts/emsdk-shell # Interactive shell with emcc available

10# ./scripts/emsdk-shell emcc --help # Run a single command

11# ./scripts/emsdk-shell make wasm # Run make with wasm target

12#

13# First run will install emsdk (~400MB download).

14#

16set -e

18SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

19PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"

20EMSDK_HOME="${EMSDK_HOME:-$HOME/.emsdk}"

22# Packages needed for FHS container

23GUIX_PACKAGES=(

24 coreutils

25 bash

26 gcc-toolchain

27 python

28 git

29 node

30 xz

31 nss-certs

32 tar

33 gzip

34 zlib

35 make

36 grep

37 sed

38)

40# Ensure emsdk directory exists

41mkdir -p "$EMSDK_HOME"

43# Build the guix shell command

44GUIX_CMD=(

45 guix shell

46 --container

47 --emulate-fhs

48 --network

49 --share="$PROJECT_DIR=/project"

50 --share="$EMSDK_HOME=/emsdk-home"

51)

53# Add all packages

54for pkg in "${GUIX_PACKAGES[@]}"; do

55 GUIX_CMD+=("$pkg")

56done

58# Setup script to run inside the container

59SETUP_SCRIPT='

60export SSL_CERT_DIR=/etc/ssl/certs

61export EMSDK_QUIET=1

63# Prevent Emscripten from finding host headers

64# These vars would cause emcc to use host includes, which breaks the build

65unset CPATH

66unset C_INCLUDE_PATH

67unset CPLUS_INCLUDE_PATH

69# Install emsdk if not present

70if [ ! -d "/emsdk-home/emsdk" ]; then

71 echo "Installing emsdk (first-time setup)..."

72 cd /emsdk-home

73 git clone https://github.com/emscripten-core/emsdk.git

74 cd emsdk

75 ./emsdk install latest

76 ./emsdk activate latest

77 echo "emsdk installation complete."

78fi

80# Activate emsdk

81cd /emsdk-home/emsdk

82source ./emsdk_env.sh 2>/dev/null

84# Change to project directory

85cd /project

86'

88if [ $# -eq 0 ]; then

89 # Interactive shell

90 FULL_SCRIPT="$SETUP_SCRIPT

91exec bash"

92 exec "${GUIX_CMD[@]}" -- bash -c "$FULL_SCRIPT"

93else

94 # Run provided command

95 FULL_SCRIPT="$SETUP_SCRIPT

96$*"

97 exec "${GUIX_CMD[@]}" -- bash -c "$FULL_SCRIPT"

98fi