Merge pull request #2995 from pi-hole/tweak/NoFurtherThanLatestTag

Don't allow repo to go further than latest tag on master

automated install/basic-install.sh

@@ -376,16 +376,12 @@ is_repo() {
     # Use a named, local variable instead of the vague $1, which is the first argument passed to this function
     # These local variables should always be lowercase
     local directory="${1}"
-    # A local variable for the current directory
-    local curdir
     # A variable to store the return code
     local rc
-    # Assign the current directory variable by using pwd
-    curdir="${PWD}"
     # If the first argument passed to this function is a directory,
     if [[ -d "${directory}" ]]; then
         # move into the directory
-        cd "${directory}"
+        pushd "${directory}" &> /dev/null || return 1
         # Use git to check if the directory is a repo
         # git -C is not used here to support git versions older than 1.8.4
         git status --short &> /dev/null || rc=$?
@@ -395,7 +391,7 @@ is_repo() {
         rc=1
     fi
     # Move back into the directory the user started in
-    cd "${curdir}"
+    popd &> /dev/null || return 1
     # Return the code; if one is not set, return 0
     return "${rc:-0}"
 }
@@ -405,6 +401,7 @@ make_repo() {
     # Set named variables for better readability
     local directory="${1}"
     local remoteRepo="${2}"
+
     # The message to display when this function is running
     str="Clone ${remoteRepo} into ${directory}"
     # Display the message and use the color table to preface the message with an "info" indicator
@@ -417,11 +414,20 @@ make_repo() {
     # Clone the repo and return the return code from this command
     git clone -q --depth 20 "${remoteRepo}" "${directory}" &> /dev/null || return $?
     # Data in the repositories is public anyway so we can make it readable by everyone (+r to keep executable permission if already set by git)
-    chmod -R a+rX "${directory}"
-
+    chmod -R a+rX "${directory}"    
+    # Move into the directory that was passed as an argument
+    pushd "${directory}" &> /dev/null || return 1
+    # Check current branch. If it is master, then reset to the latest availible tag.
+    # In case extra commits have been added after tagging/release (i.e in case of metadata updates/README.MD tweaks)    
+    curBranch=$(git rev-parse --abbrev-ref HEAD)
+    if [[ "${curBranch}" == "master" ]]; then #If we're calling make_repo() then it should always be master, we may not need to check.
+         git reset --hard "$(git describe --abbrev=0 --tags)" || return $?
+    fi
     # Show a colored message showing it's status
     printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
-    # Always return 0? Not sure this is correct
+
+    # Move back into the original directory
+    popd &> /dev/null || return 1
     return 0
 }
 
@@ -432,17 +438,14 @@ update_repo() {
     # but since they are local, their scope does not go beyond this function
     # This helps prevent the wrong value from being assigned if you were to set the variable as a GLOBAL one
     local directory="${1}"
-    local curdir
+    local curBranch
 
     # A variable to store the message we want to display;
     # Again, it's useful to store these in variables in case we need to reuse or change the message;
     # we only need to make one change here
     local str="Update repo in ${1}"
-
-    # Make sure we know what directory we are in so we can move back into it
-    curdir="${PWD}"
-    # Move into the directory that was passed as an argument
-    cd "${directory}" &> /dev/null || return 1
+    # Move into the directory that was passed as an argument    
+    pushd "${directory}" &> /dev/null || return 1
     # Let the user know what's happening
     printf "  %b %s..." "${INFO}" "${str}"
     # Stash any local commits as they conflict with our working code
@@ -450,12 +453,18 @@ update_repo() {
     git clean --quiet --force -d || true # Okay for already clean directory
     # Pull the latest commits
     git pull --quiet &> /dev/null || return $?
+    # Check current branch. If it is master, then reset to the latest availible tag.
+    # In case extra commits have been added after tagging/release (i.e in case of metadata updates/README.MD tweaks)    
+    curBranch=$(git rev-parse --abbrev-ref HEAD)
+    if [[ "${curBranch}" == "master" ]]; then
+         git reset --hard "$(git describe --abbrev=0 --tags)" || return $?
+    fi
     # Show a completion message
     printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
     # Data in the repositories is public anyway so we can make it readable by everyone (+r to keep executable permission if already set by git)
     chmod -R a+rX "${directory}"
     # Move back into the original directory
-    cd "${curdir}" &> /dev/null || return 1
+    popd &> /dev/null || return 1
     return 0
 }
 
@@ -494,7 +503,7 @@ resetRepo() {
     # Use named variables for arguments
     local directory="${1}"
     # Move into the directory
-    cd "${directory}" &> /dev/null || return 1
+    pushd "${directory}" &> /dev/null || return 1
     # Store the message in a variable
     str="Resetting repository within ${1}..."
     # Show the message
@@ -505,7 +514,9 @@ resetRepo() {
     chmod -R a+rX "${directory}"
     # And show the status
     printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
-    # Returning success anyway?
+    # Return to where we came from
+    popd &> /dev/null || return 1
+    # Returning success anyway?    
     return 0
 }