add script for creating local branches

patches/branch.sh

@@ -0,0 +1,94 @@
+#!/bin/bash
+master=~/minetest/games/Bucket_Game
+branches=~/git/1.pull-requests/Bucket_Game-branches
+if [ ! -d "$branches" ]; then
+    mkdir -p "$branches" || customDie "Failed to mkdir -p '$branches'"
+    echo "Created '$branches'"
+fi
+
+customDie() {
+    errcode=1
+    echo
+    echo "ERROR:"
+    echo "$1"
+    echo
+    echo
+    if [ ! -z "$2" ]; then errcode=$2; fi
+    exit $errcode
+}
+
+usage() {
+    cat<<END
+
+Usage
+=====
+
+Example:
+  branch mods/default/textures/default_gravel.png --branch gravel-patch
+
+* Specify a path relative to master.
+
+Settings:
+master=$master
+branches=$branches
+
+END
+}
+
+masterSub=
+branchSub=
+masterFile=
+branchFile=
+next=
+branch=
+partial=
+
+for var in "$@"
+do
+    if [ "@$var" = "@--branch" ]; then
+        next="branch"
+    else
+        if [ "@$next" = "@branch" ]; then
+            # NOT -p on purpose--guarantee normal name (and no spaces)
+            branch="$var"
+            mkdir "$branches/$branch" || customDie "The new branch name must be valid directory name--can't create '$branches/$var'"
+        else
+            tryPath="$master/$var"
+            if [ -f "$tryPath" ]; then
+                partial=$var
+            else
+                customDie "File does not exist: '$tryPath'"
+            fi
+        fi
+        next=
+    fi
+done
+
+if [ -z "$branch" ]; then
+    usage
+    customDie "You must specify a branch name"
+fi
+
+if [ -z "$partial" ]; then
+    usage
+    customDie "You must specify a file to fork"
+fi
+
+masterFile="$master/$partial"
+branchFile="$branches/$branch"
+masterSub="`dirname "$masterFile"`"
+branchSub="`dirname "$branchFile"`"
+
+
+parent=`dirname "$masterSub"`
+if [ ! -d "$branchSub" ]; then
+    echo "* creating '$branchSub'"
+    #mkdir -p "$branchSub"
+fi
+if [ ! -f "$branchFile" ]; then
+    #cp "$masterFile" "$branchFile"
+    echo "Copied '$masterFile'"
+    echo "to '$branchFile'"
+else
+    echo "Already exists: '$branchFile'"
+fi