From 1f4a917495864544862f28b080a5b9fe6dd8865b Mon Sep 17 00:00:00 2001
From: Dave Reisner <dreisner@archlinux.org>
Date: Sun, 16 Nov 2014 17:41:00 -0500
Subject: handle RootDir and DBPath from pacman config

---
 conf.c  | 11 +++++++++++
 conf.h  |  3 +++
 expac.c | 14 +++++++++++---
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/conf.c b/conf.c
index 5aedc6e..c4927c5 100644
--- a/conf.c
+++ b/conf.c
@@ -156,6 +156,14 @@ static int parse_one_file(config_t *config, const char *filename, char **section
         k = parse_include(config, val, section);
         if (k < 0)
           return k;
+      } else if (strcmp(line, "DBPath") == 0) {
+        config->dbpath = strdup(val);
+        if (config->dbpath == NULL)
+          return -ENOMEM;
+      } else if (strcmp(line, "RootDir") == 0) {
+        config->dbroot = strdup(val);
+        if (config->dbpath == NULL)
+          return -ENOMEM;
       }
     }
   }
@@ -170,6 +178,9 @@ void config_reset(config_t *config) {
   for (int i = 0; i < config->size; ++i)
     free(config->repos[i]);
 
+  free(config->dbroot);
+  free(config->dbpath);
+
   free(config->repos);
 }
 
diff --git a/conf.h b/conf.h
index 1ce6a17..da2e64b 100644
--- a/conf.h
+++ b/conf.h
@@ -5,6 +5,9 @@ typedef struct config_t {
   char **repos;
   int size;
   int capacity;
+
+  char *dbroot;
+  char *dbpath;
 } config_t;
 
 int config_parse(config_t *config, const char *filename);
diff --git a/expac.c b/expac.c
index ff13007..ebbaaa6 100644
--- a/expac.c
+++ b/expac.c
@@ -53,7 +53,6 @@
 static char const digits[] = "0123456789";
 static char const printf_flags[] = "'-+ #0I";
 
-alpm_db_t *db_local = NULL;
 alpm_list_t *targets = NULL;
 bool opt_readone = false;
 bool opt_verbose = false;
@@ -353,6 +352,7 @@ static bool backup_file_is_modified(const alpm_backup_t *backup_file) {
   _cleanup_free_ char *md5sum = NULL;
   bool modified;
 
+  /* TODO: respect expac->dbroot */
   snprintf(fullpath, sizeof(fullpath), "/%s", backup_file->name);
 
   md5sum = alpm_compute_md5sum(fullpath);
@@ -655,7 +655,9 @@ void expac_free(Expac *expac) {
 int expac_new(Expac **expac, int argc, char **argv) {
   Expac *e;
   enum _alpm_errno_t alpm_errno = 0;
-  config_t config = { NULL, 0, 0 };
+  config_t config = { NULL, 0, 0, NULL, NULL };
+  const char *dbroot = "/";
+  const char *dbpath = "/var/lib/pacman";
   int r;
 
   r = parse_options(argc, argv);
@@ -670,7 +672,13 @@ int expac_new(Expac **expac, int argc, char **argv) {
   if (r < 0)
     return r;
 
-  e->alpm = alpm_initialize("/", "/var/lib/pacman", &alpm_errno);
+  if (config.dbpath)
+    dbpath = config.dbpath;
+
+  if (config.dbroot)
+    dbroot = config.dbroot;
+
+  e->alpm = alpm_initialize(dbroot, dbpath, &alpm_errno);
   if (!e->alpm)
     return -alpm_errno;
 
-- 
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