AppVeyor CI Integration

[patkub]

An attempt at getting greenkeeper-lockfile working in AppVeyor CI.
AppVeyor Build that updated lockfile: https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.20
Greenkeeper PR where lockfile was updated: patkub/test-greenkeeper-lockfile-appveyor#2

Issues:

• AppVeyor runs Windows, so the existing git commands won't work. How should I go about detecting AppVeyor CI in update-lockfile.js?
• May break in other places where exec runs linux commands

[janl]

AppVeyor runs Windows, so the existing git commands won't work. How should I go about detecting AppVeyor CI in update-lockfile.js?

Why wouldn’t these commands work on Windows?

[patkub]

@janl

• The Windows equivalent of piping output to 2>/dev/null is >NUL. (https://stackoverflow.com/questions/313111/dev-null-in-windows).

• true is not recognized as a command in Windows. To get a truthful value, (exit 0) could be used which creates a new shell with exit status 0 which means success (https://stackoverflow.com/a/22071169/8234763)

• exec(git commit -m "${updateMessage}") doesn't work because Windows doesn't have process substitution and can't evaluate ${updateMessage}.

The changes to the commands in update-lockfile.js make it work on Windows, but we need to add a check to choose when to use the existing Linux commands vs the Windows commands.

Failed build log on AppVeyor before changes to update-lockfile.js:
https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.14

The system cannot find the path specified.
The system cannot find the path specified.
The system cannot find the path specified.
child_process.js:511
    throw err;
    ^

This is cause by https://github.com/greenkeeperio/greenkeeper-lockfile/blob/master/lib/update-lockfile.js#L58,L60 because /dev/null does not exist on Windows, and true is not recognized as a command.

Error: Command failed: git commit -m "chore(package): update lockfile
https://npm.im/greenkeeper-lockfile"

This seems to be caused by ${updateMessage}.

Edit: Clarified Linux/Windows detection issue, added build log

[patkub]

• I added a check to run the Windows git commands and got a passing build.
  https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.23
• Not sure how to write a test for the uncovered lines: https://travis-ci.org/greenkeeperio/greenkeeper-lockfile/jobs/292865944

[chgibb]

Would it not be possible to run through MSYS on Appveyor? With some minor tweaking, shell scripts written for Travis will work fine on Appveyor under MSYS.

[patkub]

@chgibb Thanks for the suggestion of using MSYS. I tried running just the ci-services implementation through MSYS on Appveyor and the git commit command still fails.
https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.58

I installed greenkeeper-lockfile globally with npm install -g patkub/greenkeeper-lockfile#appveyor-msys. However, running greenkeeper-lockfile through msys looks for update-lockfile.js in the local node_modules directory instead of the global location.

Installing greenkeeper-lockfile locally without modifying package.json gets it to run, but still fails on the git commit -m command.

appveyor.yml: https://github.com/patkub/test-greenkeeper-lockfile-appveyor/blob/master/appveyor.yml

[chgibb]

@patkub Can you send me a link to patkub/greenkeeper-lockfile#appveyor-msys? Wherever the repo for that package is.

[patkub]

@chgibb Yes. I just cherry-picked the add appveyor to ci-services commit from here.
https://github.com/patkub/greenkeeper-lockfile/tree/appveyor-msys

[chgibb]

This

  exec('git add npm-shrinkwrap.json 2>/dev/null || true')
  exec('git add package-lock.json 2>/dev/null || true')
  exec('git add yarn.lock 2>/dev/null || true')
  exec('git config user.email "support@greenkeeper.io"')
  exec('git config user.name "greenkeeper[bot]"')

will fail if run through node directly.

Instead of C:\MinGW\msys\1.0\bin\sh greenkeeper-lockfile-update, something like bash node ./node_modules/.bin/greenkeeper-lockfile-update should work. As long as you can get bash to invoke node to invoke greenkeeper-lockfile-update, as opposed to cmd or ps(which is the default Appveyor uses in its config).

[patkub]

@chgibb It looks like even though I get bash to invoke node to invoke greenkeeper-lockfile-update, the commands still fail to run in a bash environment. I tried two approaches:

1. patkub/test-greenkeeper-lockfile-appveyor@20641a3

I used the regular bash command available in Appveyor to run node greenkeeper-lockfile/update.js. The command passes on master, but fails to commit on a greenkeeper branch.
master: https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.97
greenkeeper: https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.98

2. patkub/test-greenkeeper-lockfile-appveyor@d3f509e

Using msys bash to invoke node to invoke greenkeeper-lockfile/update.js also passes on master, but fails to commit on a greenkeeper branch.
master: https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.99
greenkeeper: https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.100

Could this be because exec spawns a new shell, which probably isn't in a bash environment?
https://nodejs.org/api/child_process.html#child_process_child_process_exec_command_options_callback

[chgibb]

@patkub you're probably correct. I was hoping exec would spawn a new instance of the current shell (hence, trying to invoke through bash). You might want to look at invoking git through cp.spawnSync and then just discarding the buffered stdio output to get the same behaviour as exec with the redirect.

[patkub]

@chgibb @janl How about checking if running on windows, and using exec to run windows compatible git commands? I added a check for Windows and git commands to commit the updated lockfile here. This works, but could make the package more complex, and other commands run though exec might also need to be changed to work on Windows.

patkub@378ed90
Using cp.spawnSync, greenkeeper-lockfile says the Lockfile updated, but no changes are committed.
git status after greenkeeper-lockfile-update shows the changes are not staged for commit, and a git diff shows the changes to the lockfile
https://ci.appveyor.com/project/patkub/test-greenkeeper-lockfile-appveyor/build/1.0.119

[xt0rted]

AppVeyor supports Linux too now https://www.appveyor.com/docs/getting-started-with-appveyor-for-linux/