If cachedir can't be created there are no data in DBs

[jirib]

IIUC if cachedir can't be created there are no data in DBs.

# docker inspect 82d740cc0095 | jq -r '.[] | .RepoDigests'
[
  "vuls/go-msfdb@sha256:a0cc1b90e1d3b500b6d9127fb8e5d0b9ffe33da2bc7bdb410c853107ecb53814"
]

t=2020-07-14T12:36:43+0000 lvl=info msg="Opening DB" db=sqlite3
t=2020-07-14T12:36:43+0000 lvl=info msg="Init DB" db=sqlite3
t=2020-07-14T12:36:43+0000 lvl=info msg="Migrating DB" db=sqlite3
t=2020-07-14T12:36:43+0000 lvl=info msg="Fetching vulsio/msfdb-list"
t=2020-07-14T12:36:43+0000 lvl=info msg="git clone" repo=/.cache/go-msfdb/msfdb-list
t=2020-07-14T12:36:43+0000 lvl=eror msg="Failed to fetch vulsio/msfdb-list" err="mkdir /.cache: permission denied"

sqlite> .tables
edbs         metasploits  msf_edbs     msf_refs     references 
sqlite> .schema metasploits;
sqlite> 
sqlite> .schema mtasploits
sqlite> select * from metasploits;
sqlite> .quit

I solved it this way:

--mount type=tmpfs,destination=/cache,tmpfs-mode=1777 -e XDG_CACHE_HOME=/cache -u <myuser>:<myuser>

# sqlite3 /data/vuls/data/go-msfdb.sqlite3 '.schema metasploits'
CREATE TABLE "metasploits" ("id" integer primary key autoincrement,"created_at" datetime,"updated_at" datetime,"deleted_at" datetime,"name" varchar(255),"title" varchar(255),"description" varchar(255),"cve_id" varchar(255) );
CREATE INDEX idx_metasploits_deleted_at ON "metasploits"(deleted_at) ;
CREATE INDEX idx_metasploit_cve_id ON "metasploits"(cve_id) ;