feat: display `publishConfig` during `config list`

Closes: npm/statusboard#417

If the file at `$NPM_CONFIG_PREFIX/package.json` contains a
`publishConfig`, the key/value pairs will be printed along with the rest
of the output from `npm config ls`.

PR-URL: https://github.com/npm/cli/pull/4146
Credit: @lukekarrys
Close: #4146
Reviewed-by: @nlf

1 files changed, 41 insertions, 0 deletions

diff --git a/tap-snapshots/test/lib/commands/config.js.test.cjs b/tap-snapshots/test/lib/commands/config.js.test.cjs
index da7a89bae..8e9791523 100644
--- a/tap-snapshots/test/lib/commands/config.js.test.cjs
+++ b/tap-snapshots/test/lib/commands/config.js.test.cjs
@@ -342,3 +342,44 @@ userconfig = "{HOME}/.npmrc"
 ; HOME = {HOME}
 ; Run \`npm config ls -l\` to show all defaults.
 `
+
+exports[`test/lib/commands/config.js TAP config list with publishConfig > output matches snapshot 1`] = `
+; "cli" config from command line options
+
+cache = "{NPMDIR}/test/lib/commands/tap-testdir-config-config-list-with-publishConfig-sandbox/cache" 
+prefix = "{LOCALPREFIX}" 
+userconfig = "{HOME}/.npmrc" 
+
+; node bin location = {EXECPATH}
+; cwd = {NPMDIR}
+; HOME = {HOME}
+; Run \`npm config ls -l\` to show all defaults.
+
+; "publishConfig" from {LOCALPREFIX}/package.json
+; This set of config values will be used at publish-time.
+
+_authToken = (protected)
+registry = "https://some.registry"
+; "env" config from environment
+
+; cache = "{NPMDIR}/test/lib/commands/tap-testdir-config-config-list-with-publishConfig-sandbox/cache" ; overridden by cli
+global-prefix = "{LOCALPREFIX}" 
+globalconfig = "{GLOBALPREFIX}/npmrc" 
+init-module = "{HOME}/.npm-init.js" 
+local-prefix = "{LOCALPREFIX}" 
+; prefix = "{LOCALPREFIX}" ; overridden by cli
+user-agent = "npm/{NPM-VERSION} node/{NODE-VERSION} {PLATFORM} {ARCH} workspaces/false" 
+; userconfig = "{HOME}/.npmrc" ; overridden by cli
+
+; "cli" config from command line options
+
+cache = "{NPMDIR}/test/lib/commands/tap-testdir-config-config-list-with-publishConfig-sandbox/cache" 
+global = true 
+prefix = "{LOCALPREFIX}" 
+userconfig = "{HOME}/.npmrc" 
+
+; node bin location = {EXECPATH}
+; cwd = {NPMDIR}
+; HOME = {HOME}
+; Run \`npm config ls -l\` to show all defaults.
+`