1 files changed, 84 insertions, 0 deletions
diff --git a/comp2041/tigger/tigger-checkout b/comp2041/tigger/tigger-checkout
new file mode 100755
index 0000000..a1a5a21
--- /dev/null
+++ b/comp2041/tigger/tigger-checkout
@@ -0,0 +1,84 @@
+#!/bin/dash
+
+# Test if we have a valid repo before doing anything.
+if ! [ -d ".tigger/" ]; then
+  printf "tigger-add: error: tigger repository directory .tigger not found\n" >&2
+  exit 1
+fi
+
+# Case where we give it no arguments -> early out (without error?)
+target_branch=$(echo "$@" | tr -d " "); 
+if [ "$target_branch" = "" ]; then
+  # no branch provided, idk if we should print anything so just early out
+  exit 1
+fi
+
+if ! [ -d .tigger/"$target_branch" ]; then 
+  printf "tigger-checkout: error: unknown branch '%s'\n" "$target_branch" >&2
+  exit 1
+fi
+
+
+current_branch=$(cat .tigger/branch.tig)
+current_commit=$(find .tigger/"$current_branch"/ -maxdepth 1 -type d | grep -o -E "[\/][^\/]*$" | tr -d "/" | sort -n -r | head -n 1)
+if [ "$current_commit" = "" ]; then
+  current_commit="0"
+  mkdir --parents ".tigger/$current_branch/$current_commit/"
+fi
+
+target_commit=$(find .tigger/"$target_branch"/ -maxdepth 1 -type d | grep -o -E "[\/][^\/]*$" | tr -d "/" | sort -n -r | head -n 1)
+if [ "$target_commit" = "" ]; then
+  target_commit="0"
+  mkdir --parents ".tigger/$target_branch/$target_commit/"
+fi
+
+for filename in *; do
+  basename=$(basename "$filename")
+
+  # nothing in dir, just exit (should exit)
+  if ! [ -e "$filename" ]; then
+    continue
+  fi 
+  
+  # if it's in staging, do not remove
+  #if [ -e .tigger/"$current_branch"/"$current_commit"/staged/"$basename" ]; then
+  #  continue
+  #fi
+
+  # if it doesn't exist in the target commit, remove
+  if ! [ -e .tigger/"$target_branch"/"$target_commit"/commit/"$basename" ]; then
+    rm "$basename"
+    continue
+  fi
+done
+
+for filename in .tigger/"$target_branch"/"$target_commit"/commit/*; do
+  basename=$(basename "$filename")
+
+  # nothing in dir, just exit (should exit)
+  if ! [ -e "$filename" ]; then
+    continue
+  fi 
+  
+  # if it's in the current dir, do nothing TODO fix if different
+  if [ -e "$basename" ]; then
+
+    # If it's the same AND not different to current staging, don't copy.
+    if [ "$(diff .tigger/"$target_branch"/"$target_commit"/commit/"$basename" "$basename")" = "" ]; then
+      if [ "$(diff .tigger/"$current_branch"/"$current_commit"/staged/"$basename" "$basename")" != "" ]; then
+        continue
+      fi
+    fi
+
+  fi
+
+  cp "$filename" ./
+done
+
+# Non-compliant tigger vs git behaviour: copy our staged to theirs.
+rm -rf .tigger/"$target_branch"/"$target_commit"/staged
+cp -r .tigger/"$current_branch"/"$current_commit"/staged .tigger/"$target_branch"/"$target_commit"/staged
+
+echo "$target_branch" > .tigger/branch.tig
+printf "Switched to branch '%s'\n" "$target_branch"
+exit 0