Create option to detach sign gitian builds and not commit the files in the script

Gitian builds can be done where the assert files are made but no signing is done. The sigs can also optionally not be committed automatically.

contrib/gitian-build.sh

@@ -20,6 +20,8 @@ lxc=true
 osslTarUrl=http://downloads.sourceforge.net/project/osslsigncode/osslsigncode/osslsigncode-1.7.1.tar.gz
 osslPatchUrl=https://bitcoincore.org/cfields/osslsigncode-Backports-to-1.7.1.patch
 scriptName=$(basename -- "$0")
+signProg="gpg --detach-sign"
+commitFiles=true
 
 # Help Message
 read -d '' usage <<- EOF
@@ -43,6 +45,8 @@ Options:
 -m		Memory to allocate in MiB. Default 2000
 --kvm           Use KVM instead of LXC
 --setup         Setup the gitian building environment. Uses KVM. If you want to use lxc, use the --lxc option. Only works on Debian-based systems (Ubuntu, Debian)
+--detach-sign   Create the assert file for detached signing. Will not commit anything.
+--no-commit     Do not commit anything to git
 -h|--help	Print this help message
 EOF
 
@@ -148,6 +152,15 @@ while :; do
         --kvm)
             lxc=false
             ;;
+        # Detach sign
+        --detach-sign)
+            signProg="true"
+            commitFiles=false
+            ;;
+        # Commit files
+        --no-commit)
+            commitFiles=false
+            ;;
         # Setup
         --setup)
             setup=true
@@ -214,11 +227,11 @@ echo ${COMMIT}
 # Setup build environment
 if [[ $setup = true ]]
 then
-    pushd ./gitian-builder
     sudo apt-get install ruby apache2 git apt-cacher-ng python-vm-builder qemu-kvm qemu-utils
     git clone https://github.com/bitcoin-core/gitian.sigs.git
     git clone https://github.com/bitcoin-core/bitcoin-detached-sigs.git
     git clone https://github.com/devrandom/gitian-builder.git
+    pushd ./gitian-builder
     if [[ -n "$USE_LXC" ]]
     then
         sudo apt-get install lxc
@@ -258,7 +271,7 @@ then
 	    echo "Compiling ${VERSION} Linux"
 	    echo ""
 	    ./bin/gbuild -j ${proc} -m ${mem} --commit bitcoin=${COMMIT} --url bitcoin=${url} ../bitcoin/contrib/gitian-descriptors/gitian-linux.yml
-	    ./bin/gsign --signer $SIGNER --release ${VERSION}-linux --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-linux.yml
+	    ./bin/gsign -p $signProg --signer $SIGNER --release ${VERSION}-linux --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-linux.yml
 	    mv build/out/bitcoin-*.tar.gz build/out/src/bitcoin-*.tar.gz ../bitcoin-binaries/${VERSION}
 	fi
 	# Windows
@@ -268,7 +281,7 @@ then
 	    echo "Compiling ${VERSION} Windows"
 	    echo ""
 	    ./bin/gbuild -j ${proc} -m ${mem} --commit bitcoin=${COMMIT} --url bitcoin=${url} ../bitcoin/contrib/gitian-descriptors/gitian-win.yml
-	    ./bin/gsign --signer $SIGNER --release ${VERSION}-win-unsigned --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-win.yml
+	    ./bin/gsign -p $signProg --signer $SIGNER --release ${VERSION}-win-unsigned --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-win.yml
 	    mv build/out/bitcoin-*-win-unsigned.tar.gz inputs/bitcoin-win-unsigned.tar.gz
 	    mv build/out/bitcoin-*.zip build/out/bitcoin-*.exe ../bitcoin-binaries/${VERSION}
 	fi
@@ -279,12 +292,14 @@ then
 	    echo "Compiling ${VERSION} Mac OSX"
 	    echo ""
 	    ./bin/gbuild -j ${proc} -m ${mem} --commit bitcoin=${COMMIT} --url bitcoin=${url} ../bitcoin/contrib/gitian-descriptors/gitian-osx.yml
-	    ./bin/gsign --signer $SIGNER --release ${VERSION}-osx-unsigned --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-osx.yml
+	    ./bin/gsign -p $signProg --signer $SIGNER --release ${VERSION}-osx-unsigned --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-osx.yml
 	    mv build/out/bitcoin-*-osx-unsigned.tar.gz inputs/bitcoin-osx-unsigned.tar.gz
 	    mv build/out/bitcoin-*.tar.gz build/out/bitcoin-*.dmg ../bitcoin-binaries/${VERSION}
 	fi
 	popd
 
+        if [[ $commitFiles = true ]]
+        then
 	    # Commit to gitian.sigs repo
             echo ""
             echo "Committing ${VERSION} Unsigned Sigs"
@@ -296,6 +311,7 @@ then
             git commit -a -m "Add ${VERSION} unsigned sigs for ${SIGNER}"
             popd
         fi
+fi
 
 # Verify the build
 if [[ $verify = true ]]
@@ -341,7 +357,7 @@ then
 	    echo "Signing ${VERSION} Windows"
 	    echo ""
 	    ./bin/gbuild -i --commit signature=${COMMIT} ../bitcoin/contrib/gitian-descriptors/gitian-win-signer.yml
-	    ./bin/gsign --signer $SIGNER --release ${VERSION}-win-signed --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-win-signer.yml
+	    ./bin/gsign -p $signProg --signer $SIGNER --release ${VERSION}-win-signed --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-win-signer.yml
 	    mv build/out/bitcoin-*win64-setup.exe ../bitcoin-binaries/${VERSION}
 	    mv build/out/bitcoin-*win32-setup.exe ../bitcoin-binaries/${VERSION}
 	fi
@@ -352,11 +368,13 @@ then
 	    echo "Signing ${VERSION} Mac OSX"
 	    echo ""
 	    ./bin/gbuild -i --commit signature=${COMMIT} ../bitcoin/contrib/gitian-descriptors/gitian-osx-signer.yml
-	    ./bin/gsign --signer $SIGNER --release ${VERSION}-osx-signed --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-osx-signer.yml
+	    ./bin/gsign -p $signProg --signer $SIGNER --release ${VERSION}-osx-signed --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-osx-signer.yml
 	    mv build/out/bitcoin-osx-signed.dmg ../bitcoin-binaries/${VERSION}/bitcoin-${VERSION}-osx.dmg
 	fi
 	popd
 
+        if [[ $commitFiles = true ]]
+        then
             # Commit Sigs
             pushd gitian.sigs
             echo ""
@@ -367,3 +385,4 @@ then
             git commit -a -m "Add ${VERSION} signed binary sigs for ${SIGNER}"
             popd
         fi
+fi