git clone gcc branches (remove all use of svn)

Author: Damian Rouson

prerequisites/build-functions/download_if_necessary.sh

@@ -22,18 +22,8 @@ download_if_necessary()
       args=("-n")
       ;;
     "git" )
-      args=("clone")
+      args=("clone" "-b" "${arg_b}")
       ;;
-    "svn" )
-       case "${arg_B:-}" in
-         "gcc")
-           args=("ls")
-           ;;
-         *)
-           args=("checkout")
-         ;;
-       esac
-       ;;
     "curl" )
       first_three_characters=$(echo "${package_url}" | cut -c1-3)
       case "${first_three_characters}" in
@@ -95,7 +85,7 @@ download_if_necessary()
     emergency "Aborting [exit 90]"
   else
 
-    if [[ "${fetch}" == "svn" || "${fetch}" == "git" ]]; then
+    if [[ "${fetch}" == "git" ]]; then
       package_source_directory="${url_tail}"
     else
       package_source_directory="${package_name}-${version_to_build}"
@@ -110,7 +100,7 @@ download_if_necessary()
     if [[ ! -z "${arg_B:-}" ]]; then
       return
     else
-      if [[ "${fetch}" == "svn" ]]; then
+      if [[ "${fetch}" == "git" ]]; then
         search_path="${download_path}/${version_to_build}"
       else
         search_path="${download_path}/${url_tail}"

prerequisites/build-functions/set_or_print_downloader.sh

@@ -17,7 +17,7 @@ set_or_print_downloader()
   fi
 
   # Choose the first available download mechanism, prioritizing first any absolute requirement
-  # (svn for gcc development branches) and second robustness:
+  # (git for gcc development branches) and second robustness:
   info "Checking available download mechanisms: ftp, wget, and curl."
   info "\${package_name}=${package_name}  \${arg_b:-\${arg_B:-}}=${arg_b:-${arg_B:-}}"
 
@@ -35,10 +35,10 @@ set_or_print_downloader()
   fi
 
   if [[ "${package_name}" == "gcc" && ! -z "${arg_b:-${arg_B:-}}" ]]; then
-    if type svn &> /dev/null; then
-      fetch=svn
+    if type git &> /dev/null; then
+      fetch=git
     else
-      tried="svn"
+      tried="git"
     fi
   else
     fetch=${gcc_prereqs_fetch}

prerequisites/build-functions/set_or_print_url.sh

@@ -23,7 +23,7 @@ else
     if [[ -z "${arg_b:-${arg_B}}" ]]; then
       gcc_url_head="https://ftpmirror.gnu.org/gcc/gcc-${version_to_build}/"
     else
-      gcc_url_head="svn://gcc.gnu.org/svn/gcc/"
+      gcc_url_head="git://gcc.gnu.org/git/"
     fi
   fi
   package_url_head=(
@@ -52,12 +52,8 @@ else
 
   # Set differing tails for GCC release downloads versus development branch checkouts
   if [[ "${package_to_build}" == 'gcc' ]]; then
-    if [[ "${fetch}" == 'svn' ]]; then
-      if [[ "${version_to_build:-}" == "trunk" ]]; then
-        gcc_tail="${version_to_build}"
-      else
-        gcc_tail="branches/${version_to_build:-}"
-      fi
+    if [[ "${fetch}" == 'git' ]]; then
+      gcc_tail="gcc.git"
     else
       gcc_tail="gcc-${version_to_build}.tar.gz"
     fi

prerequisites/build-functions/unpack_if_necessary.sh

@@ -2,7 +2,7 @@
 # shellcheck disable=SC2154
 unpack_if_necessary()
 {
-  if [[ "${fetch}" == "svn" || "${fetch}" == "git" ]]; then
+  if [[ "${fetch}" == "git" ]]; then
     package_source_directory="${version_to_build}"
   else
     if [[ "${url_tail}" == *tar.gz || "${url_tail}" == *tar.bz2 || "${url_tail}" == *.tar.xz ]]; then