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env: Setup $HOME/$USER *before* the config directories

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They are based on $HOME, so setting $HOME has to be done first.

Fixes #7620

(untested because I'm assuming common CI systems have weird $HOME settings)
This commit is contained in:
Fabian Homborg 2021-01-11 18:49:15 +01:00
parent 20d91c6be2
commit 19efd22468
2 changed files with 43 additions and 40 deletions
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1
CHANGELOG.rst
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@ -112,6 +112,7 @@ Scripting improvements
- ``functions`` now explains when a function was defined via ``source`` instead of just saying ``Defined in -``.
- Significant performance improvements when globbing or in ``math``.
- ``echo`` no longer interprets options at the beginning of an argument (``echo "-n foo"``) (:issue:`7614`).
- Fish now better handles an unset $HOME (:issue:`7620`).
Interactive improvements
------------------------

82
src/env.cpp
View file

@ -273,17 +273,6 @@ void env_init(const struct config_paths_t *paths /* or NULL */) {
vars.set_one(FISH_BIN_DIR, ENV_GLOBAL, paths->bin);
}
wcstring user_config_dir;
path_get_config(user_config_dir);
vars.set_one(FISH_CONFIG_DIR, ENV_GLOBAL, user_config_dir);
wcstring user_data_dir;
path_get_data(user_data_dir);
vars.set_one(FISH_USER_DATA_DIR, ENV_GLOBAL, user_data_dir);
// Set up the USER and PATH variables
setup_path();
// Some `su`s keep $USER when changing to root.
// This leads to issues later on (and e.g. in prompts),
// so we work around it by resetting $USER.
@ -292,40 +281,13 @@ void env_init(const struct config_paths_t *paths /* or NULL */) {
uid_t uid = getuid();
setup_user(uid == 0);
// Set up $IFS - this used to be in share/config.fish, but really breaks if it isn't done.
vars.set_one(L"IFS", ENV_GLOBAL, L"\n \t");
// Set up the version variable.
wcstring version = str2wcstring(get_fish_version());
vars.set_one(L"version", ENV_GLOBAL, version);
vars.set_one(L"FISH_VERSION", ENV_GLOBAL, version);
// Set the $fish_pid variable.
vars.set_one(L"fish_pid", ENV_GLOBAL, to_string(getpid()));
// Set the $hostname variable
wcstring hostname = L"fish";
get_hostname_identifier(hostname);
vars.set_one(L"hostname", ENV_GLOBAL, hostname);
// Set up SHLVL variable. Not we can't use vars.get() because SHLVL is read-only, and therefore
// was not inherited from the environment.
wcstring nshlvl_str = L"1";
if (const char *shlvl_var = getenv("SHLVL")) {
const wchar_t *end;
// TODO: Figure out how to handle invalid numbers better. Shouldn't we issue a diagnostic?
long shlvl_i = fish_wcstol(str2wcstring(shlvl_var).c_str(), &end);
if (!errno && shlvl_i >= 0) {
nshlvl_str = to_string(shlvl_i + 1);
}
}
vars.set_one(L"SHLVL", ENV_GLOBAL | ENV_EXPORT, nshlvl_str);
// Set up the HOME variable.
// Unlike $USER, it doesn't seem that `su`s pass this along
// if the target user is root, unless "--preserve-environment" is used.
// Since that is an explicit choice, we should allow it to enable e.g.
// env HOME=(mktemp -d) su --preserve-environment fish
//
// Note: This needs to be *before* path_get_*, because that uses $HOME!
if (vars.get(L"HOME").missing_or_empty()) {
auto user_var = vars.get(L"USER");
if (!user_var.missing_or_empty()) {
@ -357,6 +319,46 @@ void env_init(const struct config_paths_t *paths /* or NULL */) {
}
}
wcstring user_config_dir;
path_get_config(user_config_dir);
vars.set_one(FISH_CONFIG_DIR, ENV_GLOBAL, user_config_dir);
wcstring user_data_dir;
path_get_data(user_data_dir);
vars.set_one(FISH_USER_DATA_DIR, ENV_GLOBAL, user_data_dir);
// Set up a default PATH
setup_path();
// Set up $IFS - this used to be in share/config.fish, but really breaks if it isn't done.
vars.set_one(L"IFS", ENV_GLOBAL, L"\n \t");
// Set up the version variable.
wcstring version = str2wcstring(get_fish_version());
vars.set_one(L"version", ENV_GLOBAL, version);
vars.set_one(L"FISH_VERSION", ENV_GLOBAL, version);
// Set the $fish_pid variable.
vars.set_one(L"fish_pid", ENV_GLOBAL, to_string(getpid()));
// Set the $hostname variable
wcstring hostname = L"fish";
get_hostname_identifier(hostname);
vars.set_one(L"hostname", ENV_GLOBAL, hostname);
// Set up SHLVL variable. Not we can't use vars.get() because SHLVL is read-only, and therefore
// was not inherited from the environment.
wcstring nshlvl_str = L"1";
if (const char *shlvl_var = getenv("SHLVL")) {
const wchar_t *end;
// TODO: Figure out how to handle invalid numbers better. Shouldn't we issue a diagnostic?
long shlvl_i = fish_wcstol(str2wcstring(shlvl_var).c_str(), &end);
if (!errno && shlvl_i >= 0) {
nshlvl_str = to_string(shlvl_i + 1);
}
}
vars.set_one(L"SHLVL", ENV_GLOBAL | ENV_EXPORT, nshlvl_str);
// initialize the PWD variable if necessary
// Note we may inherit a virtual PWD that doesn't match what getcwd would return; respect that
// if and only if it matches getcwd (#5647). Note we treat PWD as read-only so it was not set in