branchcache: skip entries that are topological heads in the on disk file
In the majority of cases, topological heads are also branch heads. We have
efficient way to get the topological heads and efficient way to retrieve
their branch information. So there is little value in putting them in the branch
cache file explicitly. On the contrary, writing them explicitly tend to create
very large cache file that are inefficient to read and update.
So the branch cache v3 format is no longer including them. This changeset focus
on the format aspect and have no focus on the performance aspect. We will cover
that later.
{
"version": 1,
"interactions": [
{
"response": {
"status": {
"message": "OK",
"code": 200
},
"body": {
"string": "{\"result\":[{\"id\":\"7913\",\"phid\":\"PHID-DREV-s4borg2nl7ay2mskktwq\",\"title\":\"cext: fix compiler warning about sign changing\",\"uri\":\"https:\\/\\/phab.mercurial-scm.org\\/D7913\",\"dateCreated\":\"1579207172\",\"dateModified\":\"1579207173\",\"authorPHID\":\"PHID-USER-5iutahkpkhvnxfimqjbk\",\"status\":\"0\",\"statusName\":\"Needs Review\",\"properties\":{\"draft.broadcast\":true,\"lines.added\":6,\"lines.removed\":6},\"branch\":\"default\",\"summary\":\"line.len is a Py_ssize_t, and we're casing to size_t (unsigned). On my compiler,\\nthis causes a warning to be emitted:\\n\\n```\\nmercurial\\/cext\\/manifest.c: In function 'pathlen':\\nmercurial\\/cext\\/manifest.c:48:44: warning: operand of ?: changes signedness from 'Py_ssize_t' {aka 'long int'} to 'long unsigned int' due to unsignedness of other operand [-Wsign-compare]\\n return (end) ? (size_t)(end - l-\\u003estart) : l-\\u003elen;\\n ^~~~~~\\n```\",\"testPlan\":\"\",\"lineCount\":\"12\",\"activeDiffPHID\":\"PHID-DIFF-vms2yu54d7di7r332dbs\",\"diffs\":[\"19380\"],\"commits\":[],\"reviewers\":{\"PHID-PROJ-3dvcxzznrjru2xmmses3\":\"PHID-PROJ-3dvcxzznrjru2xmmses3\"},\"ccs\":[\"PHID-USER-q42dn7cc3donqriafhjx\"],\"hashes\":[[\"hgcm\",\"\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\\u0000\"]],\"auxiliary\":{\"phabricator:projects\":[],\"phabricator:depends-on\":[]},\"repositoryPHID\":\"PHID-REPO-bvunnehri4u2isyr7bc3\"}],\"error_code\":null,\"error_info\":null}"
},
"headers": {
"content-type": [
"application/json"
],
"cache-control": [
"no-store"
],
"server": [
"Apache/2.4.10 (Debian)"
],
"date": [
"Fri, 17 Jan 2020 01:03:23 GMT"
],
"referrer-policy": [
"no-referrer"
],
"x-content-type-options": [
"nosniff"
],
"x-frame-options": [
"Deny"
],
"x-xss-protection": [
"1; mode=block"
],
"strict-transport-security": [
"max-age=0; includeSubdomains; preload"
],
"expires": [
"Sat, 01 Jan 2000 00:00:00 GMT"
],
"transfer-encoding": [
"chunked"
]
}
},
"request": {
"body": "output=json&__conduit__=1¶ms=%7B%22__conduit__%22%3A+%7B%22token%22%3A+%22cli-hahayouwish%22%7D%2C+%22ids%22%3A+%5B7913%5D%7D",
"headers": {
"content-type": [
"application/x-www-form-urlencoded"
],
"content-length": [
"146"
],
"user-agent": [
"mercurial/proto-1.0 (Mercurial 5.2.2+621-e7ba2449a883)"
],
"host": [
"phab.mercurial-scm.org"
],
"accept": [
"application/mercurial-0.1"
]
},
"method": "POST",
"uri": "https://phab.mercurial-scm.org//api/differential.query"
}
},
{
"response": {
"status": {
"message": "OK",
"code": 200
},
"body": {
"string": "{\"result\":{\"object\":{\"id\":7913,\"phid\":\"PHID-DREV-s4borg2nl7ay2mskktwq\"},\"transactions\":[{\"phid\":\"PHID-XACT-DREV-7fwthnytbq3bw2p\"},{\"phid\":\"PHID-XACT-DREV-lno5olcencqrgnh\"},{\"phid\":\"PHID-XACT-DREV-uanndmc3t3onueu\"}]},\"error_code\":null,\"error_info\":null}"
},
"headers": {
"content-type": [
"application/json"
],
"cache-control": [
"no-store"
],
"server": [
"Apache/2.4.10 (Debian)"
],
"date": [
"Fri, 17 Jan 2020 01:03:23 GMT"
],
"referrer-policy": [
"no-referrer"
],
"x-content-type-options": [
"nosniff"
],
"x-frame-options": [
"Deny"
],
"x-xss-protection": [
"1; mode=block"
],
"strict-transport-security": [
"max-age=0; includeSubdomains; preload"
],
"expires": [
"Sat, 01 Jan 2000 00:00:00 GMT"
],
"transfer-encoding": [
"chunked"
]
}
},
"request": {
"body": "output=json&__conduit__=1¶ms=%7B%22__conduit__%22%3A+%7B%22token%22%3A+%22cli-hahayouwish%22%7D%2C+%22objectIdentifier%22%3A+%22PHID-DREV-s4borg2nl7ay2mskktwq%22%2C+%22transactions%22%3A+%5B%7B%22type%22%3A+%22accept%22%2C+%22value%22%3A+true%7D%2C+%7B%22type%22%3A+%22comment%22%2C+%22value%22%3A+%22LGTM%22%7D%5D%7D",
"headers": {
"content-type": [
"application/x-www-form-urlencoded"
],
"content-length": [
"338"
],
"user-agent": [
"mercurial/proto-1.0 (Mercurial 5.2.2+621-e7ba2449a883)"
],
"host": [
"phab.mercurial-scm.org"
],
"accept": [
"application/mercurial-0.1"
]
},
"method": "POST",
"uri": "https://phab.mercurial-scm.org//api/differential.revision.edit"
}
}
]
}