Add tool to calculate Nix hash

Author: IvanIsCoding

.github/scripts/nix-hashes.sh

@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Script to calculate celq nixpkg hashes for a new version
+# Usage: .github/scripts/nix_hashes.sh <new_version>
+
+NEW_VERSION="${1:-}"
+
+if [ -z "$NEW_VERSION" ]; then
+    echo "Error: Please provide a version number"
+    echo "Usage: $0 <new_version>"
+    echo "Example: $0 0.3.0"
+    exit 1
+fi
+
+NIX_FILE="nix/celq.nix"
+
+if [ ! -f "$NIX_FILE" ]; then
+    echo "Error: $NIX_FILE not found"
+    exit 1
+fi
+
+echo "================================================"
+echo "Calculating hashes for celq v$NEW_VERSION"
+echo "================================================"
+echo
+
+# Create temporary file
+TMP_FILE="$NIX_FILE.tmp"
+cp "$NIX_FILE" "$TMP_FILE"
+
+# Update version in temporary file
+sed -i.bak "s/version = \"[^\"]*\";/version = \"$NEW_VERSION\";/" "$TMP_FILE"
+echo "Step 1: Updated version to $NEW_VERSION in temporary file"
+echo
+
+# Replace main file temporarily
+BACKUP_FILE="$NIX_FILE.backup"
+mv "$NIX_FILE" "$BACKUP_FILE"
+mv "$TMP_FILE" "$NIX_FILE"
+
+# Function to restore original file on exit
+cleanup() {
+    if [ -f "$BACKUP_FILE" ]; then
+        mv "$BACKUP_FILE" "$NIX_FILE"
+        rm -f "$NIX_FILE.bak" "$TMP_FILE.bak" 2>/dev/null || true
+        echo
+        echo "✓ Original file restored"
+    fi
+}
+trap cleanup EXIT
+
+# Step 2: Calculate fetchCrate hash
+echo "Step 2: Calculating fetchCrate hash..."
+echo "(This may take a moment...)"
+
+set +e
+BUILD_OUTPUT=$(nix build .#celq 2>&1)
+FETCH_HASH=$(echo "$BUILD_OUTPUT" | grep -oP "got:\s+sha256-\K[A-Za-z0-9+/=]+" | head -1)
+set -e
+
+if [ -z "$FETCH_HASH" ]; then
+    # If the build didn't fail, extract current hash
+    FETCH_HASH=$(grep -oP 'sha256 = "sha256-\K[^"]+' "$NIX_FILE" | head -1)
+fi
+
+if [ -z "$FETCH_HASH" ]; then
+    echo "❌ Failed to extract fetchCrate hash"
+    echo "Build output:"
+    echo "$BUILD_OUTPUT"
+    exit 1
+fi
+
+FETCH_HASH_FORMATTED="sha256-$FETCH_HASH"
+echo "✓ fetchCrate hash: $FETCH_HASH_FORMATTED"
+echo
+
+# Update the temporary file with the correct fetchCrate hash
+sed -i.bak "s|sha256 = \"sha256-[^\"]*\";|sha256 = \"$FETCH_HASH_FORMATTED\";|" "$NIX_FILE"
+
+# Step 3: Calculate cargoHash
+echo "Step 3: Calculating cargoHash..."
+echo "(This will trigger a build error to extract the correct hash...)"
+
+# Set dummy hash
+sed -i.bak 's/cargoHash = "sha256-[^"]*";/cargoHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";/' "$NIX_FILE"
+
+set +e
+BUILD_OUTPUT=$(nix build .#celq 2>&1)
+CARGO_HASH=$(echo "$BUILD_OUTPUT" | grep -oP "got:\s+sha256-\K[A-Za-z0-9+/=]+" | tail -1)
+set -e
+
+if [ -z "$CARGO_HASH" ]; then
+    echo "❌ Failed to extract cargoHash"
+    echo "Build output:"
+    echo "$BUILD_OUTPUT"
+    exit 1
+fi
+
+CARGO_HASH_FORMATTED="sha256-$CARGO_HASH"
+echo "✓ cargoHash: $CARGO_HASH_FORMATTED"
+echo
+
+# Output results
+echo "================================================"
+echo "Hash Calculation Results for celq v$NEW_VERSION"
+echo "================================================"
+echo
+echo "Update the following values in nix/celq.nix:"
+echo
+echo "  version = \"$NEW_VERSION\";"
+echo
+echo "  sha256 = \"$FETCH_HASH_FORMATTED\";"
+echo
+echo "  cargoHash = \"$CARGO_HASH_FORMATTED\";"
+echo
+echo "================================================"
+
+# Export for GitHub Actions
+if [ -n "${GITHUB_OUTPUT:-}" ]; then
+    echo "FETCH_HASH=$FETCH_HASH_FORMATTED" >> "$GITHUB_OUTPUT"
+    echo "CARGO_HASH=$CARGO_HASH_FORMATTED" >> "$GITHUB_OUTPUT"
+fi

.github/workflows/release_calculate_nix_hashes.yml

@@ -0,0 +1,31 @@
+name: Calculate celq nixpkg hashes
+
+on:
+  workflow_dispatch:
+    inputs:
+      new_version:
+        description: 'New version to calculate hashes for (e.g., 0.3.0)'
+        required: true
+        type: string
+
+jobs:
+  calculate-hashes:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      
+      - name: Install Nix
+        uses: cachix/install-nix-action@v26
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+      
+      - name: Make script executable
+        run: chmod +x .github/scripts/nix-hashes.sh
+      
+      - name: Calculate hashes
+        id: hashes
+        run: .github/scripts/nix-hashes.sh "${{ inputs.new_version }}"