Save plots to file, & add image-creation workflow

.github/workflows/make-images.yml

@@ -0,0 +1,46 @@
+name: Create Images and Upload to Imgur
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 12 * * *'
+jobs:
+  upload-image:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+
+    - name: Generate
+      run: |
+        python sea-surface-temps.py --mode map --dataset sst --days-ago 1 --out sst-map.png
+        python sea-surface-temps.py --mode map --dataset anom --days-ago 1 --out sst-anom-map.png
+        python sea-surface-temps.py --mode all --dataset sst --out sst-all.png
+        python sea-surface-temps.py --mode all --dataset anom --out sst-all-anom.png
+
+    - name: Upload images to Imgur
+      env:
+        IMGUR_CLIENT_ID: ${{ secrets.IMGUR_CLIENT_ID }}
+      run: |
+      
+        curl --request POST \
+          --url https://api.imgur.com/3/image \
+          --header "Authorization: Client-ID $IMGUR_CLIENT_ID" \
+          --form image=@"./sst-map.png"
+        curl --request POST \
+          --url https://api.imgur.com/3/image \
+          --header "Authorization: Client-ID $IMGUR_CLIENT_ID" \
+          --form image=@"./sst-anom-map.png"
+        curl --request POST \
+          --url https://api.imgur.com/3/image \
+          --header "Authorization: Client-ID $IMGUR_CLIENT_ID" \
+          --form image=@"./sst-all.png"
+        curl --request POST \
+          --url https://api.imgur.com/3/image \
+          --header "Authorization: Client-ID $IMGUR_CLIENT_ID" \
+          --form image=@"./sst-all-anom.png"

.gitignore

@@ -1 +1 @@
-sst-data-cache.json
+

sea-surface-temps.py

@@ -171,8 +171,7 @@ def plot_globe_dataset(data, hdf, vmin, vmax, cmap, title):
     plt.colorbar(c, orientation='horizontal', pad=0.05)
 
     plt.title(title)
-    plt.savefig('/tmp/sst-map.png', dpi=300)
-    plt.show()
+    return plt
 
 def process_date(args):
     if args.days_ago:
@@ -204,6 +203,11 @@ def process_date(args):
                                                       [0.8, "yellow"], [0.9, "red"],
                                                       [1.0, "darkred"]])
         plot_globe_dataset(data, hdf, 0, 30, sst_cmap, f'{date}\nSea Surface Temp, °C')
+    if args.out:
+        plt.savefig(args.out, dpi=300)
+    else:
+        plt.show()
+
 
 def process_all(args):
     def get_data(temp_data, dataset_name):
@@ -261,8 +265,10 @@ def plot_fig(temps, title):
         plt.text(0, 0,
                  msg,
                  ha="left", va="top", transform=plt.gca().transAxes, fontsize=9)
-        plt.savefig('/tmp/sst.png', dpi=300)
-        plt.show()
+        if args.out:
+            plt.savefig(args.out, dpi=300)
+        else:
+            plt.show()
 
     temp_data = {}               # indexed by year and then day of year (0-based)
     type = 'anom'                # 'anom' or 'sst'
@@ -300,6 +306,8 @@ class CustomFormatter(argparse.ArgumentDefaultsHelpFormatter,
         parser.add_argument('--days-ago', type=int,
                             default=0,
                             help="""Days ago (before today), for map mode""")
+        parser.add_argument('--out', '-o', type=pathlib.Path,
+                            help="""Output image to this path""")
         parser.add_argument('--cache-file', type=pathlib.Path,
                             default='./sst-data-cache.json',
                             help="""Cache file to speed up future runs""")