1 files changed, 77 insertions, 0 deletions
diff --git a/.local/bin/wat b/.local/bin/wat
new file mode 100755
index 0000000..7d5cd14
--- /dev/null
+++ b/.local/bin/wat
@@ -0,0 +1,77 @@
+#!/bin/sh
+log_lines() {
+  if [ "$SHOW_TIMESTAMPS" -eq 1 ]; then
+    regex_start='\[\([^]]*\)\] '
+    replacement='\1 \3'
+  else
+    regex_start='.*'
+    replacement='\2'
+  fi
+
+  if [ "$SHOW_INSTALLED" -eq 1 ]; then
+    regex_end='\(starting full system upgrade\|upgraded.*\|installed.*\)'
+  else
+    regex_end='\(starting full system upgrade\|upgraded.*\)'
+  fi
+
+  regex='^'"$regex_start"'\[\(PACMAN\|ALPM\)\] '"$regex_end"'$'
+
+  sed "/$regex/!d; s//$replacement/" "$PACMAN_LOG"
+}
+
+mark_lines() {
+  n=1
+
+  while read -r line; do
+    case "$line" in
+      *starting\ full\ system\ upgrade*)
+        printf "%i " "$n"
+        n=$((n + 1))
+        ;;
+    esac
+
+    printf "%s\n" "$line"
+  done
+}
+
+: "${PACMAN_LOG:=/var/log/pacman.log}"
+: "${SHOW_INSTALLED:=0}"
+: "${SHOW_TIMESTAMPS:=0}"
+
+while [ -n "$1" ]; do
+  case "$1" in
+    -i | --installed) SHOW_INSTALLED=1 ;;
+    -t | --timestamps) SHOW_TIMESTAMPS=1 ;;
+    -l | --log)
+      shift
+      PACMAN_LOG="$1"
+      ;;
+    *) break ;;
+  esac
+  shift
+done
+
+n_start=${1:-1}
+n_max=$(grep -cF ' starting full system upgrade' "$PACMAN_LOG")
+
+# Print whole log if we've asked to start too far
+[ "$n_max" -lt "$n_start" ] && n_start=$n_max
+
+end='$' # EOF
+
+if [ -n "$2" ]; then
+  n_stop=$2
+
+  if [ "$n_start" -le "$n_stop" ] || [ "$n_max" -lt "$n_stop" ]; then
+    # Empty or negative range, or non-intersecting with available log.
+    exit
+  fi
+
+  end="/^\($n_stop\) .*\(starting.*\)$/"
+fi
+
+log_lines | tac | mark_lines | tac |
+  sed "
+    /^\($n_start\) .*\(starting.*\)$/,$end !d;
+    s//\1 \2/;
+  "