ledger-analytics collapse through awk

ledger-api.js.patch

diff --git i/ledger-api.js w/ledger-api.js
index 963cc90..be07899 100644
--- i/ledger-api.js
+++ w/ledger-api.js
@@ -20,6 +20,9 @@ const cleanInput = (str) => {
   return padSpace(str.trim())
 }
 
+const sumByDate = "awk -F' ' '{a[$1]+=$2}END{for(x in a)print x\" \"a[x]}'";
+const pipe = (...commands) => commands.join(" | ");
+
 class LedgerApi {
   constructor () {
     this._file = ``
@@ -91,16 +94,15 @@ class LedgerApi {
     ]
     */
 
-    const { stdout } = await exec(`ledger reg -f` +
+    const { stdout } = await exec(pipe(`ledger reg -f` +
       this._file +
       this._query +
       this._commodity +
       ` -j` +
       this._period +
-      this._extraArgs +
-      ` --collapse` +
-      ` --plot-total-format="%(format_date(date, "%Y-%m-%d")) %(abs(quantity(scrub(display_total))))"`.split('\n').join('')
-    )
+      this._extraArgs
+        .split('\n').join('')
+    ,  sumByDate, 'sort')); 
 
     return stdout
       .split('\n')
@@ -118,19 +120,20 @@ class LedgerApi {
   };
 
   async getCommodities () {
-    const { stdout } = await exec('ledger commodities -f' + this._file + this._extraArgs)
+    const { stdout } = await exec(`ledger commodities -f` + this._file + this._extraArgs)
     const commodities = stdout.split('\n').filter(x => x.length > 0)
     return { commodities }
   };
 
   async getGrowth () {
-    const { stdout } = await exec(`ledger reg -f` +
+    const { stdout } = await exec(pipe(`ledger reg -f` +
       this._file +
       this._query +
       this._commodity +
       ` -J -M` +
-      this._extraArgs +
-      ` --collapse`.split('\n').join('')
+      this._extraArgs
+        .split('\n').join('')
+        , sumByDate, 'sort')
     )
 
     const growth = stdout