[pacman-dev] [PATCH v2] paccache: adding the possibility for multiple cachedirs

[Maxim Andersson]

Either by specifing several -c parameters or only
one -c parameter with a comma separated value.
One could for example be for the official arch packages
and one for the aur.

Signed-off-by: Maxim Andersson <thesilentboatman at gmail.com>
---
 contrib/paccache.sh.in | 82 ++++++++++++++++++++++++++++++--------------------
 1 file changed, 49 insertions(+), 33 deletions(-)

diff --git a/contrib/paccache.sh.in b/contrib/paccache.sh.in
index 039ac8a..e96bf81 100644
--- a/contrib/paccache.sh.in
+++ b/contrib/paccache.sh.in
@@ -23,9 +23,9 @@ shopt -s extglob
 declare -r myname='paccache'
 declare -r myver='@PACKAGE_VERSION@'
 
-declare -a candidates=() cmdopts=() whitelist=() blacklist=()
+declare -a cachedirs=() candidates=() cmdopts=() whitelist=() blacklist=()
 declare -i delete=0 dryrun=0 filecount=0 move=0 needsroot=0 totalsaved=0 verbose=0
-declare    cachedir=@localstatedir@/cache/pacman/pkg delim=$'\n' keep=3 movedir= scanarch=
+declare    delim=$'\n' keep=3 movedir= scanarch=
 
 USE_COLOR='y'
 
@@ -159,25 +159,25 @@ A flexible pacman cache cleaning utility.
 Usage: ${myname} <operation> [options] [targets...]
 
   Operations:
-    -d, --dryrun          perform a dry run, only finding candidate packages.
-    -m, --move <dir>      move candidate packages to "dir".
-    -r, --remove          remove candidate packages.
+    -d, --dryrun           perform a dry run, only finding candidate packages.
+    -m, --move <dir>       move candidate packages to "dir".
+    -r, --remove           remove candidate packages.
 
   Options:
-    -a, --arch <arch>     scan for "arch" (default: all architectures).
-    -c, --cachedir <dir>  scan "dir" for packages.
-                          (default: @localstatedir@/cache/pacman/pkg).
-    -f, --force           apply force to mv(1) and rm(1) operations.
-    -h, --help            display this help message and exit.
-    -i, --ignore <pkgs>   ignore "pkgs", comma-separated. Alternatively, specify
-                          "-" to read package names from stdin, newline-
-                          delimited.
-    -k, --keep <num>      keep "num" of each package in the cache (default: 3).
-    --nocolor             remove color from output.
-    -u, --uninstalled     target uninstalled packages.
-    -v, --verbose         increase verbosity. specify up to 3 times.
-    -z, --null            use null delimiters for candidate names (only with -v
-                          and -vv).
+    -a, --arch <arch>      scan for "arch" (default: all architectures).
+    -c, --cachedir <dirs>  scan "dirs" for packages, comma-separated.
+                           (default: @localstatedir@/cache/pacman/pkg).
+    -f, --force            apply force to mv(1) and rm(1) operations.
+    -h, --help             display this help message and exit.
+    -i, --ignore <pkgs>    ignore "pkgs", comma-separated. Alternatively,
+                           pecify "-" to read package names from stdin, newline-
+                           delimited.
+    -k, --keep <num>       keep "num" of each package in the cache (default: 3).
+    --nocolor              remove color from output.
+    -u, --uninstalled      target uninstalled packages.
+    -v, --verbose          increase verbosity. specify up to 3 times.
+    -z, --null             use null delimiters for candidate names (only with -v
+                           and -vv).
 
 EOF
 }
@@ -203,7 +203,9 @@ while :; do
 			scanarch=$2
 			shift ;;
 		-c|--cachedir)
-			cachedir=$2
+			IFS=',' read -r -a dirs <<< "$2"
+			cachedirs+=("${dirs[@]}")
+			unset dirs
 			shift ;;
 		-d|--dryrun)
 			dryrun=1 ;;
@@ -256,6 +258,11 @@ done
 
 m4_include(../scripts/library/term_colors.sh)
 
+# setting default cachedir
+if [ "${#cachedirs[@]}" -eq 0 ]; then
+	cachedirs[0]='@localstatedir@/cache/pacman/pkg'
+else
+
 # remaining args are a whitelist
 whitelist=("$@")
 
@@ -265,28 +272,37 @@ case $(( dryrun+delete+move )) in
 	[^1]) die "only one operation may be used at a time" ;;
 esac
 
-[[ -d $cachedir ]] ||
-	die "cachedir '%s' does not exist or is not a directory" "$cachedir"
-
 [[ $movedir && ! -d $movedir ]] &&
 	die "destination directory '%s' does not exist or is not a directory" "$movedir"
 
 if (( move || delete )); then
 	# make it an absolute path since we're about to chdir
 	[[ ${movedir:0:1} != '/' ]] && movedir=$PWD/$movedir
-	[[ ! -w $cachedir || ( $movedir && ! -w $movedir ) ]] && needsroot=1
+	[[ $movedir && ! -w $movedir ]] && needsroot=1
 fi
 
-# unlikely that this will fail, but better make sure
-cd "$cachedir" >/dev/null || die "failed to chdir to '%s'" "$cachedir"
+for cachedir in "${cachedirs[@]}"; do
+	[[ -d $cachedir ]] ||
+		die "cachedir '%s' does not exist or is not a directory" "$cachedir"
+
+	if (( move || delete )); then
+		[[ ! -w $cachedir  ]] && needsroot=1
+	fi
 
-# note that these results are returned in an arbitrary order from awk, but
-# they'll be resorted (in summarize) iff we have a verbosity level set.
-IFS=$'\n' read -r -d '' -a candidates < \
-	<(printf '%s\n' *.pkg.tar?(.+([^.])) | pacsort --files |
-		pkgfilter "$keep" "$scanarch" \
-			"${#whitelist[*]}" "${whitelist[@]}" \
-			"${#blacklist[*]}" "${blacklist[@]}")
+	# unlikely that this will fail, but better make sure
+	cd "$cachedir" >/dev/null || die "failed to chdir to '%s'" "$cachedir"
+
+	# note that these results are returned in an arbitrary order from awk, but
+	# they'll be resorted (in summarize) iff we have a verbosity level set.
+	IFS=$'\n' read -r -d '' -a cand < \
+		<(printf '%s\n' *.pkg.tar?(.+([^.])) | pacsort --files |
+			pkgfilter "$keep" "$scanarch" \
+				"${#whitelist[*]}" "${whitelist[@]}" \
+				"${#blacklist[*]}" "${blacklist[@]}")
+
+	candidates+=("${cand[@]}")
+	unset cand
+done
 
 if (( ! ${#candidates[*]} )); then
 	msg 'no candidate packages found for pruning'
-- 
2.0.3