test: Retry in the case of network errors (#2606)

# Description
This is an attempt to reduce test flakiness.  In particular, many tests die due to external network errors.  These failures can probably be addressed by retries.

Note:  This does not attempt to address internal network errors.  E.g. port conflicts (I have seen this only ~once~ twice on a random port) or `dfx start` failing to respond to http requests.

.curlrc

@@ -0,0 +1 @@
+--retry-max-time 60

.github/workflows/audit.yml

@@ -10,6 +10,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   build_matrix:
     runs-on: ubuntu-latest

.github/workflows/build-frontend-canister.yml

@@ -6,6 +6,12 @@ on:
       - master
   pull_request:
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   frontend:
     runs-on: ubuntu-latest

.github/workflows/consistent-sources.yml

@@ -9,6 +9,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   check:
     runs-on: ubuntu-latest

.github/workflows/deny.yml

@@ -10,6 +10,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   cargo-deny:
     name: license-check:required

.github/workflows/e2e.yml

@@ -9,6 +9,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   build_dfx:
     runs-on: ${{ matrix.os }}

.github/workflows/fmt.yml

@@ -6,6 +6,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   test:
     name: fmt

.github/workflows/lint.yml

@@ -6,6 +6,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   test:
     name: lint

.github/workflows/motoko-updater.yml

@@ -18,6 +18,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   niv-updater:
     name: 'Check for Motoko updates'

.github/workflows/niv-updater.yml

@@ -17,6 +17,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   niv-updater:
     name: 'Check for updates'

.github/workflows/pr.yml

@@ -14,6 +14,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   check:
     runs-on: ubuntu-latest

.github/workflows/prepare-dfx-assets.yml

@@ -12,6 +12,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   prepare:
     runs-on: ${{ matrix.os }}

.github/workflows/publish-manifest.yml

@@ -9,6 +9,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   publish-manifest:
     runs-on: ubuntu-latest

.github/workflows/publish.yml

@@ -15,6 +15,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   build_dfx:
     runs-on: ${{ matrix.os }}

.github/workflows/shellcheck.yml

@@ -14,6 +14,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   check_macos:
     # ubuntu-latest has shellcheck 0.4.6, while macos-latest has 0.7.1

.github/workflows/unit.yml

@@ -9,6 +9,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   test:
     runs-on: ${{ matrix.os }}

.github/workflows/update-docs.yml

@@ -6,6 +6,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   update_dfx_json_schema:
     runs-on: ${{ matrix.os }}

.github/workflows/update-replica-version.yml

@@ -23,7 +23,11 @@ concurrency:
 
 env:
   IC_RELEASES_API: "https://ic-api.internetcomputer.org/api/v3/subnet-replica-versions?limit=50&offset=0"
-
+  # When getting Rust dependencies, retry on network error:
+  CARGO_NET_RETRY: 10
+  # Use the local .curlrc
+  CURL_HOME: .
+
 jobs:
   update-replica:
     runs-on: ubuntu-latest

.npmrc

@@ -0,0 +1 @@
+fetch-retries=10