Add two new GET parameters to request reference api by date.

Instead of using version, this commit add timestamp and date
parameters

.gitlab-ci.yml

@@ -72,7 +72,7 @@ deb-for-buster: &deb-for-buster
     - mk-build-deps -ir -t 'apt-get -y --no-install-recommends'
     - gem install bundler -v 2.1.4
     - apt-get install -y curl pkg-config
-    - rm ../*deb
+    - rm -f ../*deb
     - dpkg-buildpackage
     - cp ../*deb .
   artifacts:

app/controllers/resources_controller.rb

@@ -96,7 +96,9 @@ class ResourcesController < ApplicationController
     object = repository.find(
       path.gsub(%r{/?platforms}, ''),
       branch: params[:branch],
-      version: params[:version]
+      version: params[:version],
+      timestamp: params[:timestamp],
+      date: params[:date]
     )
 
     raise ServerUnavailable if object.is_a?(Exception)

lib/grid5000/repository.rb

@@ -112,14 +112,17 @@ module Grid5000
 
     def find_commit_for(options = {})
       options[:branch] ||= 'master'
-      version, branch = options.values_at(:version, :branch)
-      if version.nil?
-        instance.branches[branch].target
-      elsif version.to_s.length == 40 # SHA
+      version, branch, timestamp, date = options.values_at(:version, :branch, :timestamp, :date)
+      if version && version.to_s.length == 40 # SHA
         instance.lookup(version)
-      else
-        # version should be a date, get the closest commit
-        date = version.to_i
+      elsif timestamp || date || version
+        if timestamp
+          ts = timestamp.to_i
+        elsif date
+          ts = Time.parse(date).to_i
+        else
+          ts = version.to_i
+        end
 
         return nil if instance.branches[branch].nil?
 
@@ -128,12 +131,14 @@ module Grid5000
         walker.push(instance.branches[branch].target.oid)
 
         commits = walker.select do |commit|
-          commit.epoch_time <= date
+          commit.epoch_time <= ts
         end
         commits.map! { |commit| commit.oid }
 
         sha = commits.first
         find_commit_for(options.merge(version: sha))
+      else
+        instance.branches[branch].target
       end
     rescue Rugged::OdbError
       nil

spec/lib/grid5000/repository_spec.rb

@@ -65,15 +65,21 @@ describe Grid5000::Repository do
         expect(commit.oid).to eq(@latest_commit)
       end
 
-      it 'should find the commit associated with the given version [version=DATE] 1/2' do
+      it 'should find the commit associated with the given timestamp [version=TS]' do
         date = Time.parse('2009-03-13 17:24:20 +0100')
         commit = @repository.find_commit_for(version: date.to_i)
         expect(commit.oid).to eq('b00bd30bf69c322ffe9aca7a9f6e3be0f29e20f4')
       end
 
-      it 'should find the commit associated with the given version [version=DATE] 2/2' do
-        date = Time.parse('2009-03-13 17:24:47 +0100')
-        commit = @repository.find_commit_for(version: date.to_i)
+      it 'should find the commit associated with the given timestamp [timestamp=TS] 1/2' do
+        date = Time.parse('2009-03-13 17:24:20 +0100')
+        commit = @repository.find_commit_for(timestamp: date.to_i)
+        expect(commit.oid).to eq('b00bd30bf69c322ffe9aca7a9f6e3be0f29e20f4')
+      end
+
+      it 'should find the commit associated with the given date [date=DATE] 2/2' do
+        date = '2009-03-13 17:24:47 +0100'
+        commit = @repository.find_commit_for(date: date)
         expect(commit.oid).to eq('e07895a4b480aaa8e11c35549a97796dcc4a307d')
       end
 
@@ -87,7 +93,7 @@ describe Grid5000::Repository do
       it 'should return nil when asking for a version from a branch that does not exist' do
         date = Time.parse('Fri Mar 13 17:24:47 2009 +0100')
         commit = @repository.find_commit_for(
-          version: date.to_i,
+          timestamp: date.to_i,
           branch: 'doesnotexist'
         )
         expect(commit).to be_nil