WIP: Resolve "DbEx: add dump fork tree command"

Closes #155

lib/core/core/src/commands/dbex.rs

@@ -47,6 +47,10 @@ pub enum DbExSubCommand {
     #[structopt(name = "distance", setting(structopt::clap::AppSettings::ColoredHelp))]
     DistanceOpt(DistanceOpt),
     /// Forks tree explorer
+    ///
+    /// Blocks are printed from the root to the newer ones (from top to bottom). Main branch blocks are printed on the left (the main branch is represented by ║ characters). A block is represented by the character # and is followed by its block stamp (block number + hash).
+    ///
+    /// By default, blocks inside a branch, those with only one child, are ommited and hashs are truncated to 10 characters. If some blocks are ommited, then the number of them is indicated between parantheses. In verbose mode, all blocks and complete hashs are printed.
     #[structopt(name = "forks", setting(structopt::clap::AppSettings::ColoredHelp))]
     ForksOpt(ForksOpt),
     /// Member explorer
@@ -67,7 +71,11 @@ pub struct DistanceOpt {
 
 #[derive(StructOpt, Debug, Copy, Clone)]
 /// ForksOpt
-pub struct ForksOpt {}
+pub struct ForksOpt {
+    /// Print complete tree and complete hashs
+    #[structopt(short = "v", long = "verbose")]
+    pub verbose: bool,
+}
 
 #[derive(StructOpt, Debug, Copy, Clone)]
 /// MembersOpt
@@ -113,9 +121,11 @@ impl DursExecutableCoreCommand for DbExOpt {
                 self.csv,
                 &DbExQuery::WotQuery(DbExWotQuery::AllDistances(distance_opts.reverse)),
             ),
-            DbExSubCommand::ForksOpt(_forks_opts) => {
-                dbex(profile_path, self.csv, &DbExQuery::ForkTreeQuery)
-            }
+            DbExSubCommand::ForksOpt(forks_opts) => dbex(
+                profile_path,
+                self.csv,
+                &DbExQuery::ForkTreeQuery(forks_opts.verbose),
+            ),
             DbExSubCommand::MemberOpt(member_opts) => dbex(
                 profile_path,
                 self.csv,