epm-restore: add require.json (npm) support

bin/epm-restore

@@ -110,6 +110,76 @@ __epm_restore_pip()
     docmd epm install $ilist
 }
 
+__epm_print_npm_list()
+{
+    local reqmacro="$1"
+    local req_file="$2"
+    local l
+    while read l ; do
+        # "tap": "^14.10.7"
+        echo "$l" | grep -q '"\(.*\)": "\(.*\)"' || continue
+        local name="$(echo "$l" | sed -e 's|.*"\(.*\)": ".*|\1|')"
+        [ -z "$name" ] && continue
+        local ver="$(echo "$l" | sed -e 's|.*"\(.*\)": "\(.*\)".*|\2|')" #'
+        [ -z "$name" ] && continue
+
+        if [ -n "$dryrun" ] ; then
+            local pi=''
+            local sign
+            if echo "$ver" | grep -q "^\^" ; then
+                sign=">="
+            else
+                sign="="
+            fi
+            ll=$(echo "$ver" | sed -e 's|^[^~]||')
+            pi="$pi$reqmacro node-$name $sign $ll"
+#         [ -n "$pi" ] && pi="$pi
+#"
+#           [ -n "$pi" ] || pi="$pi$reqmacro: node-$t"
+            echo "$pi"
+            continue
+        else
+            local pi="node-$name"
+            #echo "    $l -> $name -> $pi"
+        fi
+        [ -n "$name" ] || continue
+        ilist="$ilist $pi"
+    done < $req_file
+
+    [ -n "$dryrun" ] || echo "$ilist"
+}
+
+__epm_restore_npm()
+{
+    local req_file="$1"
+
+    epm assure jq
+
+    if [ -n "$dryrun" ] ; then
+        local lt=$(mktemp)
+        a= jq .dependencies <$req_file >$lt
+        echo
+        echo "# generated by epm --restore --dry-run from $(basename $(dirname $(realpath $req_file)))/$req_file"
+        __epm_print_npm_list "Requires:" $lt
+
+        echo
+        echo "# devDependencies generated by epm --restore --dry-run from $(basename $(dirname $(realpath $req_file)))/$req_file"
+        a= jq .devDependencies <$req_file >$lt
+        __epm_print_npm_list "BuildRequires:" $lt
+        rm -f $lt
+        return
+    fi
+
+    info "Install requirements from $req_file ..."
+    local lt=$(mktemp)
+    a= jq .dependencies <$req_file >$lt
+    ilist="$(__epm_print_npm_list "" $lt)"
+    a= jq .devDependencies <$req_file >$lt
+    ilist="$ilist $(__epm_print_npm_list "" $lt)"
+    rm -f $lt
+    docmd epm install $ilist
+}
+
 __epm_restore_by()
 {
     local req_file="$1"
@@ -132,6 +202,9 @@ __epm_restore_by()
         requirements.txt|requirements_dev.txt|requires.txt)
             [ -s "$req_file" ] && __epm_restore_pip "$req_file"
             ;;
+        package.json)
+            [ -s "$req_file" ] && __epm_restore_npm "$req_file"
+            ;;
         Gemfile|package.json)
             info "$req_file support is not implemented yet"
             ;;
@@ -158,7 +231,7 @@ epm_restore()
 # TODO: nowhere works: python3 setup.py --requires
 
     # if run with empty args
-    for i in requirements.txt requirements_dev.txt Gemfile requires.txt; do
+    for i in requirements.txt requirements_dev.txt Gemfile requires.txt package.json; do
         __epm_restore_by $i
     done