1 files changed, 60 insertions, 0 deletions
diff --git a/org-chart.py b/org-chart.py
new file mode 100755
index 0000000..67a3883
--- /dev/null
+++ b/org-chart.py
@@ -0,0 +1,60 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i python -p "python3.withPackages(p: [p.matplotlib])"
+
+import re
+import sys
+import math
+import argparse
+import fileinput
+import matplotlib.pyplot as plt
+
+# Complex regex that grabs two match groups: category and %, but it ignores rows
+# with a headline that starts with "\_", thereby selecting only the top-level
+# agenda items.
+clocktable_row = re.compile(
+    r"^\|\s*\|\s(\w*(?!.*\_)).*\|.*\s+(\d+\.\d)\s\|$",
+    re.MULTILINE,
+)
+
+if __name__ == '__main__':
+    cli = argparse.ArgumentParser(description='Generate a pie chart from your org agenda clocktable')
+    cli.add_argument('infile', type=argparse.FileType('r'), nargs='?', default='-')
+    cli.add_argument('outfile', type=argparse.FileType('w'), nargs='?', default=None)
+    args = cli.parse_args()
+
+    content = args.infile.read()
+    matches = re.finditer(clocktable_row, content)
+
+    slices = {}
+    for m in matches:
+        if m.group(1) == "ALL": continue
+        k = m.group(1)
+        v = float(m.group(2))
+        if k not in slices:
+            slices[k] = v
+        else:
+            slices[k] += v
+
+    # Round up b/c of floating point arithmetic
+    total = math.ceil(sum(slices.values()))
+    if total != 100:
+        print("Warning: Sum of the slices is {} but it should be 100!".format(total))
+
+    fig, ax = plt.subplots()
+    wedges, texts, autotexts = ax.pie(
+        slices.values(),
+        labels = slices.keys(),
+        autopct='%1.1f%%',
+        textprops=dict(color="w"))
+
+    ax.legend(wedges, slices.keys(), title="Categories", loc="center left",
+              bbox_to_anchor=(0, 0, 0.5, 1))
+
+    ax.axis('equal') # Equal aspect ratio ensures pie is drawn as a circle
+    plt.setp(autotexts, size=8, weight="bold")
+    ax.set_title("How I spent my time")
+
+    if args.outfile is None:
+        plt.show()
+    else:
+        plt.savefig(args.outfile.name)