From 1cf57ad2eb6982384e001741df7b359212427fa6 Mon Sep 17 00:00:00 2001
From: Esteban Carnevale <alfplayer@mailoo.org>
Date: Fri, 7 Nov 2014 14:08:38 -0300
Subject: parabola-mirror-repos: Add and fix comments

---
 parabola-mirror-repos | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/parabola-mirror-repos b/parabola-mirror-repos
index b109f1d..292fcbc 100755
--- a/parabola-mirror-repos
+++ b/parabola-mirror-repos
@@ -139,12 +139,13 @@ _prepare_locking()  { eval "exec $lockfd>\"$lockfile\""; trap _no_more_locking E
 
 _prepare_locking
 
-# Lock now. The lock is disabled automatically when the script exits (with any error code).
+# Lock now. The lock is disabled automatically when the script exits (with any error code)
 if ! _lock xn ; then
     echo "=> ERROR: Could not obtain lock. Exiting." >&2
     exit 1
 fi
 
+# Set non-configurable variables
 date="$(date +%Y.%m.%d)"
 current="${local_dir}-${date}"
 current_component="${current##*/}"
@@ -195,6 +196,7 @@ if [[ $terminal == 1 ]] ; then
     options+=" --progress"
 fi
 
+# Create --link-dest option strings
 for i in ${!link_dest[@]}; do
     if [[ -d ${link_dest[$i]} ]] ; then
         link_dest_option[i]="${link_dest[@]/#/--link-dest=}"
@@ -286,6 +288,7 @@ if [[ ${db_and_symlinks_update} == 1 ]] ; then
   remote_repo_dirs="${remote_repo_dirs[@]/%//os}"
 
   echo "=> Getting pool path list"
+  # Fetch symlinks from the server, extract symlink destinations and save them to the file $remote_pool_files
   rsync -lrv --out-format="%L" --dry-run --exclude 'mips64el' --exclude '*mips64el.pkg.tar.*' ${remote_repo_dirs[@]} "/tmp/${script_filename}.unexistent_filename" \
     | grep -- "->" \
     | grep "pool.*[^/]$" \
@@ -302,17 +305,21 @@ if [[ ${db_and_symlinks_update} == 1 ]] ; then
     # Avoid duplicates (comes from -any packages present in both i686/ and x86_64/)
     sort -u -o "$remote_pool_files" "$remote_pool_files"
 
+    # Sort local pool files to pass the file to comm in the next step
     sort -o "$local_pool_files" "$local_pool_files"
 
-    # Keep lines that only appears in local_pool_files
+    # Keep lines that only appear in local_pool_files
     comm -13 "$remote_pool_files" "$local_pool_files" > "$pool_files_to_delete"
 
+    # Calculate number of pool files to delete
     NUMBER_TO_DELETE="$(wc -l $pool_files_to_delete | cut -d ' ' -f 1)"
 
+    # Fail if there are too many files to delete
     if [[ "$NUMBER_TO_DELETE" -gt "$max_delete" ]] ; then
       error "  => ERROR: The number of pool package files to be deleted is ${NUMBER_TO_DELETE}, greater than the specified maximum which is ${max_delete}"
     fi
 
+    # Delete pool files
     if [[ $NUMBER_TO_DELETE -gt 0 ]] ; then
       if [[ ${no_file_delete} == 1 ]] ; then
         echo "=> Deleting ${NUMBER_TO_DELETE} old pool package files"
-- 
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