Add script to generate pdf reports.

tools/report.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+
+CSV_FILE="data.csv"
+REPORT_MD="report.md"
+REPORT_PDF="/home/felixm/report.pdf"
+YEAR="2018-04"
+HLEDGER="hledger balance -M -V -b $YEAR --depth 1 --transpose -o $CSV_FILE"
+
+# Networth
+$HLEDGER -H '^assets'
+sed -i 's/\$//g' $CSV_FILE
+python tofig.py $CSV_FILE "figure_1.png"
+
+$HLEDGER '^assets'
+sed -i 's/\$//g' $CSV_FILE
+sed -i 's/assets/cashflow/g' $CSV_FILE
+python tofig.py $CSV_FILE "figure_2.png" --type bar
+
+$HLEDGER '^expenses'
+sed -i 's/\$//g' $CSV_FILE
+python tofig.py $CSV_FILE "figure_3.png" --type bar
+
+$HLEDGER '^income'
+sed -i 's/\$-//g' $CSV_FILE
+python tofig.py $CSV_FILE "figure_4.png" --type bar
+
+rm $CSV_FILE
+
+cat > $REPORT_MD <<- EOM
+# Financial Report
+
+# Networth
+![](figure_1.png)
+
+# Cashflow
+![](figure_2.png)
+
+# Expenses
+![](figure_3.png)
+
+# Income
+![](figure_4.png)
+EOM
+
+pandoc $REPORT_MD -o $REPORT_PDF
+rm figure_*
+rm $REPORT_MD
+

tools/tofig.py

@@ -0,0 +1,40 @@
+import matplotlib.pyplot as plt
+import pandas as pd
+import argparse
+
+
+def line_format(label):
+    """
+    Convert time label to the format of pandas line plot
+    """
+    month = label.month_name()[:3]
+    if month == 'Jan':
+        month = f'{label.year}\n{month}'
+    return month
+
+
+def create_figure(args):
+    df = pd.read_csv(args.csv_file, index_col='Account', parse_dates=True)
+    df = df.drop(columns="Total:")
+    figsize=(10, 6)
+    if args.type == 'bar':
+        ax = df.plot(grid=True, kind='bar', figsize=figsize)
+        ax.set_xticklabels(map(lambda x: line_format(x), df.index))
+    else:
+        ax = df.plot(grid=True, figsize=figsize)
+    plt.savefig(args.png_file)
+    # plt.show()
+
+
+def get_args():
+    parser = argparse.ArgumentParser(description='Transform a CSV file into a bar chart.')
+    parser.add_argument('csv_file', type=str, help='CSV data file')
+    parser.add_argument('png_file', type=str, help='Chart png file')
+    parser.add_argument('--type', default='', type=str, help='Chart png file')
+    return parser.parse_args()
+
+
+if __name__ == "__main__":
+    args = get_args()
+    create_figure(args)
+