new: add remove operation

src/ctx/remove.c

@@ -0,0 +1,73 @@
+#include "../../include/error.h"
+#include "../../include/pool.h"
+#include "../../include/util.h"
+#include "../../include/ctx.h"
+
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+bool lm_ctx_remove(lm_ctx_t *ctx, lm_pkg_t *pkg, lm_ctx_remove_callback_t callback, void *data){
+  if(NULL == ctx && NULL == pkg){
+    lm_error_set(LM_ERR_ArgNULL);
+    return false;
+  }
+
+  if(!lm_ctx_database_is_installed(ctx, pkg, true)){
+    lm_error_set(LM_ERR_PkgNotInstalled);
+    return false;
+  }
+
+  if(!lm_ctx_database_init(ctx))
+    return false;
+
+  size_t total = 0, current = 0;
+  char *path = NULL, *hash = NULL;
+  bool in_keep = false, ret = false;
+
+  total = lm_database_files_count(ctx->db, pkg);
+
+  while(lm_database_files_next(ctx->db, pkg, &path, &hash, &in_keep)){
+    if(in_keep)
+      goto next;
+   
+    if(exists(path) && unlink(path) < 0){
+      pdebug(__func__, "failed to delete file for removing %s: %s", pkg->name, errno);
+      lm_error_set(LM_ERR_PkgFileUnlinkFail, path, strerror(errno));
+      goto end;
+    }
+  next:
+    if(!callback(ctx, pkg, path, ++current, total, data))
+      goto end;
+  }
+
+  if(!lm_database_package_del(ctx->db, pkg)){
+    char *suberr = lm_strerror_dup();
+    pdebug(__func__, "failed to delete %s from the database: %s", pkg->name, lm_strerror());
+    lm_error_set(LM_ERR_PkgDatabaseDelFail, suberr);
+    free(suberr);
+    goto end;
+  }
+
+  if(!lm_database_files_del(ctx->db, pkg)){
+    char *suberr = lm_strerror_dup();
+    pdebug(__func__, "failed to delete files of %s from the database: %s", pkg->name, suberr);
+    lm_error_set(LM_ERR_PkgFilesDelFail, suberr);
+    free(suberr);
+    goto end;
+  }
+
+  if(!lm_database_changes_del(ctx->db, pkg)){
+    char *suberr = lm_strerror_dup();
+    pdebug(__func__, "failed to delete changes file for %s: %s", pkg->name, suberr);
+    lm_error_set(LM_ERR_PkgChangesDelFail, suberr);
+    goto end;
+  }
+
+  ret = true;
+end: 
+  lm_database_files_next_free(ctx->db, pkg, &path, &hash, &in_keep);
+  return ret;
+}
+