# Environment Variables

The standard library's [strconv.ParseBool][] is used to parse boolean environment
variables.  It accepts 1, t, T, TRUE, true, True, 0, f, F, FALSE, false,
False. Any other value is an implicit false.

For integer values, [strconv.Atoi][] is used which means only base 10 numbers are
valid.

[strconv.ParseBool]: https://golang.org/pkg/strconv/#ParseBool
[strconv.Atoi]: https://golang.org/pkg/strconv/#Atoi

`AWS_ACCESS_KEY_ID` (string) and `AWS_ACCESS_KEY_SECRET` (string)
: See http://docs.aws.amazon.com/fws/1.1/GettingStartedGuide/index.html?AWSCredentials.html.
  Used in s3 tests.  If not set some tests are skip.  If set, queries will be
  sent to Amazon's S3 service.

`CAMLI_APP_BINDIR` (string)
: Path to the directory where Perkeep first looks for the server applications
  executables, when starting them. It looks in PATH otherwise.

`CAMLI_AUTH` (string)
: See [server-config](server-config.md).
  Used as a fallback in pkg/client.Client (except on android) when
  configuration files lack and 'auth' entry.  If a client is using the -server
  commandline to specify the Perkeep instance to talk to, this env var
  takes precedence over that specified in the configuration files.

`CAMLI_BASEURL` (string)
: URL set in devcam to act as a baseURL in the devcam launched camlistored.

`CAMLI_CACHE_DIR` (string)
: Path used by [pkg/osutil](/pkg/osutil) to override operating system specific
  cache directory.

`CAMLI_CONFIG_DIR` (string)
: Path used by pkg/osutil to override operating system specific configuration
  directory.

`CAMLI_DBNAME` (string)
: Backend specific data source name (DSN).
  Set in devcam to pass database configuration for the indexer to the devcam
  launched camlistored.

`CAMLI_DEBUG` (bool)
: Used by camlistored and camput to enable additional commandline options.
  Used in pkg/schema to enable additional logging.

`CAMLI_DEBUG_CONFIG` (bool)
: Causes pkg/serverconfig to dump low-level configuration derived from
  high-level configuation on load.

`CAMLI_DEBUG_X` (string)
: String containing magic substring(s) to enable debuggging in code.

`CAMLI_DEBUG_UPLOADS` (bool)
: Used by [pkg/client](/pkg/client) to enable additional logging.

`CAMLI_DEFAULT_SERVER` (string)
: The server alias to use by default. The string is the server's alias key
  in the client-config.json "servers" object. If set, the `CAMLI_DEFAULT_SERVER`
  takes precedence over the "default" bool in client-config.json.

`CAMLI_DEV_CAMLI_ROOT` (string)
: If set, the base directory of Perkeep when in dev mode.
  Used by [pkg/server](/pkg/server) for finding static assests (js, css, html).
  Used as a signal by [pkg/index/\*](/pkg/index) and [pkg/server](/pkg/server)
  to output more helpful error message when run under devcam.

`CAMLI_DEV_CLOSURE_DIR` (string)
: Path override for [pkg/server](/pkg/server). If specified, this path will be
  used to serve the closure handler.

`CAMLI_DISABLE_IMPORTERS` (bool)
: If true, importers are disabled (at least automatic background
  importing, e.g. at start-up). Mostly for debugging.

`CAMLI_FAST_DEV` (bool)
: Used by dev/demo.sh for giving presentations with devcam server/put/etc
  for faster pre-built builds, without calling make.go.

`CAMLI_FORCE_OSARCH` (bool)
  Used by make.go to force building an unrecommended OS/ARCH pair.

`CAMLI_GCE_\*`
: Variables prefixed with `CAMLI_GCE_` concern the Google Compute Engine deploy
  handler in [pkg/deploy/gce](/pkg/deploy/gce), which is only used by camweb to
  launch Perkeep on Google Compute Engine. They do not affect Perkeep's
  behaviour.

`CAMLI_GCE_CLIENTID` (string)
: See `CAMLI_GCE_*` first. This string is used by gce.DeployHandler as the
  application's OAuth Client ID. If blank, camweb does not enable the Google
  Compute Engine launcher.

`CAMLI_GCE_CLIENTSECRET` (string)
: See `CAMLI_GCE_*` first. Used by gce.DeployHandler as the application's OAuth
  Client Secret. If blank, gce.NewDeployHandler returns an error, and camweb
  fails to start if the Google Compute Engine launcher was enabled.

`CAMLI_GCE_DATA` (string)
: See `CAMLI_GCE_*` first. Path to the directory where gce.DeployHandler stores
  the instances configuration and state. If blank, the "camli-gce-data" default
  is used instead.

`CAMLI_GCE_PROJECT` (string)
: See `CAMLI_GCE_*` first. ID of the Google Project that provides the above
  client ID and secret. It is used when we query for the list of all the
  existing zones, since such a query requires a project ID. If blank, a
  hard-coded list of zones is used instead.

`CAMLI_GCE_SERVICE_ACCOUNT` (string)
: See `CAMLI_GCE_*` first. Path to a Google service account JSON file. This
  account should have at least compute.readonly permissions on the Google
  Project wih ID CAMLI_GCE_PROJECT.  It is used to authenticate when querying
  for the list of all the existing zones. If blank, a hard-coded list of zones
  is used instead.

`CAMLI_GCE_XSRFKEY` (string)
: See `CAMLI_GCE_*` first. Used by gce.DeployHandler as the XSRF protection key.
  If blank, gce.NewDeployHandler generates a new random key instead.

`CAMLI_GOPHERJS_GOROOT` (string)
: As gopherjs does not build with go tip, when make.go is run with go devel,
  CAMLI_GOPHERJS_GOROOT should be set to a Go 1.9 root so that gopherjs can be
  built with Go 1.9. Otherwise it defaults to $HOME/go1.9.

`CAMLI_HELLO_ENABLED (bool)
: Whether to start the hello world app as well. Variable used only by devcam server.

`CAMLI_HTTP_DEBUG` (bool)
: Enable per-request logging in [pkg/webserver](/pkg/webserver).

`CAMLI_HTTP_EXPVAR` (bool)
: Enable json export of expvars at /debug/vars

`CAMLI_HTTP_PPROF` (bool)
: Enable standard library's pprof handler at /debug/pprof/

`CAMLI_IGNORED_FILES` (string)
: Override client configuration option 'ignoredFiles'.  Comma-seperated list of
files to be ignored by [pkg/client](/pkg/client) when uploading.

`CAMLI_INCLUDE_PATH` (string)
: Path to search for files.
  Referenced in [pkg/osutil](/pkg/osutil) and used indirectly by
  [go4.org/jsonconfig.ConfigParser](http://go4.org/jsonconfig#ConfigParser) to search for
  files mentioned in configurations.  This is used as a last resort after first
  checking the current directory and the Perkeep config directory. It should
  be in the OS path form, i.e. unix-like systems would be
  /path/1:/path/two:/some/other/path, and Windows would be C:\path\one;D:\path\2

`CAMLI_KEYID` (string)
: Optional GPG identity to use, taking precedence over config files.
  Used by devcam commands, in config/dev-server-config.json, and
  config/dev-client-dir/client-config.json as the public ID of the GPG
  key to use for signing.

`CAMLI_KV_VERIFY` (bool)
: Enable all the VerifyDb\* options in cznic/kv, to e.g. track down
  corruptions.

`CAMLI_KVINDEX_ENABLED` (bool)
:  Use cznic/kv as the indexer. Variable used only by devcam server.

`CAMLI_LEVELDB_ENABLED` (bool)
: Use syndtr/goleveldb as the indexer. Variable used only by devcam server.

`CAMLI_MEMINDEX_ENABLED` (bool)
: Use a memory-only indexer. Supported only by devcam server.

`CAMLI_MONGO_WIPE` (bool)
: Wipe out mongo based index on startup.

`CAMLI_NO_FILE_DUP_SEARCH` (bool)
: This will cause the search-for-exists-before-upload step to be skipped when
  camput is uploading files.

`CAMLI_PPROF_START` (string)
: Filename base to write a "<base>.cpu" and "<base>.mem" profile out
  to during server start-up.  Used to profile index corpus scanning,
  mostly.

`CAMLI_PUBLISH_ENABLED (bool)
: Whether to start the publisher app as well. Variable used only by devcam server.

`CAMLI_SCANCAB_ENABLED (bool)
: Whether to start the scanning cabinet app as well. Variable used only by devcam server.

`CAMLI_SECRET_RING` (string)
: Path to the GPG secret keyring, which is otherwise set by identitySecretRing
  in the server config, and secretRing in the client config.

`CAMLI_SHA1_ENABLED (bool)
: Whether to enable the use of legacy sha1 blobs. Only used for development, for
  creating new blobs with the legacy SHA-1 hash, instead of with the current one.
  It does not affect the ability of Perkeep to read SHA-1 blobs.

`CAMLI_DISABLE_CLIENT_CONFIG_FILE` (bool)
: If set, the [pkg/client](/pkg/client) code will never use the on-disk config
  file.

`CAMLI_TRACK_FS_STATS` (bool)
: Enable operation counts for fuse filesystem.

`CAMLI_TRUSTED_CERT` (string)
: Override client configuration option 'trustedCerts'.
  Comma-seperated list of paths to trusted certificate fingerprints.

`CAMPUT_ANDROID_OUTPUT` (bool)
: Enable pkg/client status messages to print to stdout. Used in android client.

`CAMLI_DEBUG_IMAGES` (bool)
: Enable extra debugging in [pkg/images](/pkg/images) when decoding images.
  Used by indexers.

`CAMLI_DISABLE_DJPEG` (bool)
: Disable use of djpeg(1) to down-sample JPEG images by a factor of 2, 4 or 8.
  Only has an effect when djpeg is found in the PATH.

`CAMLI_DISABLE_THUMB_CACHE` (bool)
: If true, no thumbnail caching is done, and URLs even have cache
  buster components, to force browsers to reload a lot.

`CAMLI_VAR_DIR` (string)
: Path used by [pkg/osutil](/pkg/osutil) to override operating system specific
  application storage directory. Generally unused.

`CAMLI_S3_FAIL_PERCENT` (int)
: Number from 0-100 of what percentage of the time to fail receiving blobs
  for the S3 handler.

`DEV_THROTTLE_KBPS` (integer) and `DEV_THROTTLE_LATENCY_MS` (integer)
: Rate limit and/or inject latency in pkg/webserver responses. A value of 0
  disables traffic-shaping.

`RUN_BROKEN_TESTS` (bool)
: Run known-broken tests.