added jbang back (aaif-goose#3076)

accidentally deleted restore

Author: Kvadratni

ui/desktop/src/bin/jbang

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+# Enable strict mode to exit on errors and unset variables
+set -euo pipefail
+
+# Set log file
+LOG_FILE="/tmp/mcp.log"
+
+# Clear the log file at the start
+> "$LOG_FILE"
+
+# Function for logging
+log() {
+    local MESSAGE="$1"
+    echo "$(date +'%Y-%m-%d %H:%M:%S') - $MESSAGE" | tee -a "$LOG_FILE"
+}
+
+# Trap errors and log them before exiting
+trap 'log "An error occurred. Exiting with status $?."' ERR
+
+log "Starting jbang setup script."
+
+# Ensure ~/.config/goose/mcp-hermit/bin exists
+log "Creating directory ~/.config/goose/mcp-hermit/bin if it does not exist."
+mkdir -p ~/.config/goose/mcp-hermit/bin
+
+# Change to the ~/.config/goose/mcp-hermit directory
+log "Changing to directory ~/.config/goose/mcp-hermit."
+cd ~/.config/goose/mcp-hermit
+
+# Check if hermit binary exists and download if not
+if [ ! -f ~/.config/goose/mcp-hermit/bin/hermit ]; then
+    log "Hermit binary not found. Downloading hermit binary."
+    curl -fsSL "https://github.com/cashapp/hermit/releases/download/stable/hermit-$(uname -s | tr '[:upper:]' '[:lower:]')-$(uname -m | sed 's/x86_64/amd64/' | sed 's/aarch64/arm64/').gz" \
+        | gzip -dc > ~/.config/goose/mcp-hermit/bin/hermit && chmod +x ~/.config/goose/mcp-hermit/bin/hermit
+    log "Hermit binary downloaded and made executable."
+else
+    log "Hermit binary already exists. Skipping download."
+fi
+
+log "setting hermit cache to be local for MCP servers"
+mkdir -p ~/.config/goose/mcp-hermit/cache
+export HERMIT_STATE_DIR=~/.config/goose/mcp-hermit/cache
+
+# Update PATH
+export PATH=~/.config/goose/mcp-hermit/bin:$PATH
+log "Updated PATH to include ~/.config/goose/mcp-hermit/bin."
+
+# Initialize hermit
+log "Initializing hermit."
+hermit init >> "$LOG_FILE"
+
+# Install OpenJDK using hermit
+log "Installing OpenJDK with hermit."
+hermit install openjdk@17 >> "$LOG_FILE"
+
+# Download and install jbang if not present
+if [ ! -f ~/.config/goose/mcp-hermit/bin/jbang ]; then
+    log "Downloading and installing jbang."
+    curl -Ls https://sh.jbang.dev | bash -s - app setup
+    cp ~/.jbang/bin/jbang ~/.config/goose/mcp-hermit/bin/
+fi
+
+# Verify installations
+log "Verifying installation locations:"
+log "hermit: $(which hermit)"
+log "java: $(which java)"
+log "jbang: $(which jbang)"
+
+# Check for custom registry settings
+log "Checking for GOOSE_JBANG_REGISTRY environment variable for custom jbang registry setup..."
+if [ -n "${GOOSE_JBANG_REGISTRY:-}" ] && curl -s --head --fail "$GOOSE_JBANG_REGISTRY" > /dev/null; then
+    log "Checking custom goose registry availability: $GOOSE_JBANG_REGISTRY"
+    log "$GOOSE_JBANG_REGISTRY is accessible. Setting it as JBANG_REPO."
+    export JBANG_REPO="$GOOSE_JBANG_REGISTRY"
+else
+    log "GOOSE_JBANG_REGISTRY is not set or not accessible. Using default jbang repository."
+fi
+
+# Trust all jbang scripts that a user might install. Without this, Jbang will attempt to
+# prompt the user to trust each script. However, Goose does not surfact this modal and without
+# user input, the addExtension method will timeout and fail.
+jbang --quiet trust add *
+
+# Final step: Execute jbang with passed arguments, always including --fresh and --quiet
+log "Executing 'jbang' command with arguments: $*"
+jbang --fresh --quiet "$@" || log "Failed to execute 'jbang' with arguments: $*"
+
+log "jbang setup script completed successfully."