Shell script and call from Python

.gitignore

@@ -0,0 +1 @@
+__pycache__

lib.py

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+#!/usr/bin/python3
+
+import subprocess
+
+def script (*args):
+    p = subprocess.run (('./script.sh',) + args, stdout=subprocess.PIPE)
+    p = p.stdout.split (b'\n')
+    del p[-1]
+    return p

query.py

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+#!/usr/bin/python3
+
+import lib
+
+p = lib.script ('list-tags')
+p = b'\n'.join (p)
+p = p.decode()
+print (p)

script.sh

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+#!/bin/sh
+
+# FIXME: hardcoded path
+cd /srv/git/linux
+
+test $# -gt 0 || set invalid
+
+cmd=$1
+shift
+
+case $cmd in
+    list-tags)
+        git tag |
+        sed 's/$/.0/' |
+        sort -V |
+        sed 's/\.0$//'
+        ;;
+
+    get-blob)
+        git cat-file blob $1
+        ;;
+
+    get-dir)
+        git ls-tree -l "v$1:$2" |
+        awk '{print $2" "$5" "$4}' |
+        grep -v ' \.' |
+        sort -t ' ' -k 1,1r -k 2,2
+        ;;
+
+    list-blobs)
+        if [ "$1" = '-p' ]; then
+            format='\1 \2'
+            shift
+        elif [ "$1" = '-f' ]; then
+            format='\1 \4'
+            shift
+        else
+            format='\1'
+        fi
+
+        git ls-tree -r "v$1" |
+        sed -r "s/^\S* blob (\S*)\t(([^/]*\/)*(.*))$/$format/"
+        ;;
+
+    tokenize-blob)
+        git cat-file blob $1 |
+        tr '\n<>' '\1\2\3' |
+        sed 's/\/\*/</g' |
+        sed 's/\*\//>/g' |
+        sed -r 's/(\W*)(<[^>]*>)?(\w*)/\1\2\n\3\n/g'
+        ;;
+
+    untokenize)
+        tr -d '\n' |
+        sed 's/>/\*\//g' |
+        sed 's/</\/\*/g' |
+        tr '\1\2\3' '\n<>'
+        ;;
+
+    parse-defs)
+        tmp=`mktemp -d`
+        git cat-file blob "$1" > $tmp/$2
+        ctags -x $tmp/$2 | awk '{print $1" "$2" "$3}'
+        rm $tmp/$2
+        rmdir $tmp
+        ;;
+
+    *)
+        echo "Usage: $0 [list-tags | get-blob | get-dir | list-blobs | tokenize-blob | parse-defs]"
+        exit 1
+esac