Commit c45d54e555f2

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# univ: update niv (and generate a nice commit)
+
+set -euo pipefail
+
+SOURCES=nix/sources.json
+
+error() {
+    echo "::error::$*"
+    exit 1
+}
+
+update() {
+    local dep=$1
+    echo "checking for update: $dep" >&2
+    owner=$(jq -r ".\"$dep\".owner" < ${SOURCES})
+    repo=$(jq -r ".\"$dep\".repo" < ${SOURCES})
+    old_rev=$(jq -r ".\"$dep\".rev" < ${SOURCES})
+    dep_url=$(jq -r ".\"$dep\".url // empty" < "${SOURCES}" | { grep github.com || true; })
+    [[ -n $dep_url ]] && is_github="yes" || is_github=""
+    niv update $dep 1>&2
+    new_rev=$(jq -r ".\"$dep\".rev" < ${SOURCES})
+    if [[ $old_rev == $new_rev ]]; then
+        echo "… no updates" >&2
+        return
+    fi
+    echo "$dep: ${old_rev} to ${new_rev}"
+    if [[ -z $is_github ]]; then
+        echo "$dep not using github.com, no changelog"
+    else
+        merges_filter=""
+        hub api "/repos/$owner/$repo/compare/${old_rev}...${new_rev}" \
+            | jq -r '.commits[] '"$merges_filter"' | "* [`\(.sha[0:8])`](\(.html_url)) \(.commit.message | split("\n") | first)"' \
+            | sed "s~\(#[0-9]\+\)~$owner/$repo\1~g"
+    fi
+}
+
+main() {
+    message=$(mktemp)
+    commit_msg=$(mktemp)
+    for dep in $(jq -r 'keys[]' < ${SOURCES}); do
+        update $dep >> $message
+        echo "" >> $message
+    done
+    echo $message $commit_msg
+    content=$(cat $message | tr -d '\n')
+    if [[ -z "$content" ]]; then
+        echo "No updates, do nothing"
+        exit 0
+    fi
+    echo "nix: niv update(s)" > $commit_msg
+    echo "" >> $commit_msg
+    cat $message >> $commit_msg
+    git add nix
+    git commit -F $commit_msg
+}
+
+main $@