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Add uninstall directive to manifest

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Allows for removal of old files or packages
This commit is contained in:
fosslinux 2024-01-12 22:06:23 +11:00
parent 8cc26fa60a
commit bbe121f382
3 changed files with 99 additions and 17 deletions
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52
seed/script-generator.c
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@ -11,7 +11,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <bootstrappable.h>
struct Token {
char *val;
@ -23,6 +22,7 @@ typedef struct Token Token;
#define TYPE_IMPROVE 2
#define TYPE_DEFINE 3
#define TYPE_JUMP 4
#define TYPE_UNINSTALL 5
struct Directive {
Token *tok;
@ -212,12 +212,12 @@ Token *fill(Token *tok, Directive *directive, int type) {
Token *logic(Token *tok, char **val) {
/* logic = "("
* (name |
* (name "==" value) |
* (name "!=" value) |
* (logic "||" logic) |
* (logic "&&" logic))
* ")"
* (name |
* (name "==" value) |
* (name "!=" value) |
* (logic "||" logic) |
* (logic "&&" logic))
* ")"
*/
char *lhs = tok->val;
@ -237,15 +237,15 @@ Token *logic(Token *tok, char **val) {
lhs = "False";
}
} else if (strcmp(tok->val, "!=") == 0) {
/* Case for inequality. */
rhs = tok->next->val;
tok = tok->next->next;
if (strcmp(get_var(lhs), rhs) == 0) {
lhs = "False";
} else {
lhs = "True";
}
} else {
/* Case for inequality. */
rhs = tok->next->val;
tok = tok->next->next;
if (strcmp(get_var(lhs), rhs) == 0) {
lhs = "False";
} else {
lhs = "True";
}
} else {
fputs("Expected == or != after ", stderr);
fputs(lhs, stderr);
fputs(" in logic\n", stderr);
@ -360,7 +360,7 @@ Token *define(Token *tok, Directive *directive) {
}
int interpret(Directive *directive) {
/* directive = (build | improve | define | jump) predicate? */
/* directive = (build | improve | define | jump | uninstall) predicate? */
Token *tok = directive->tok;
if (strcmp(tok->val, "build:") == 0) {
tok = fill(tok->next, directive, TYPE_BUILD);
@ -371,6 +371,20 @@ int interpret(Directive *directive) {
} else if (strcmp(tok->val, "define:") == 0) {
tok = define(tok->next, directive);
return 1; /* There is no codegen for a define. */
} else if (strcmp(tok->val, "uninstall:") == 0) {
tok = fill(tok->next, directive, TYPE_UNINSTALL);
while (tok != NULL) {
if (strcmp(tok->val, "(") == 0) {
break;
}
if (strlen(directive->arg) + strlen(tok->val) + 1 > MAX_STRING) {
fputs("somehow you have managed to have too many uninstall arguments.\n", stderr);
exit(1);
}
directive->arg = strcat(directive->arg, " ");
directive->arg = strcat(directive->arg, tok->val);
tok = tok->next;
}
}
if (tok != NULL) {
@ -618,6 +632,10 @@ void generate(Directive *directives) {
fclose(out);
out = start_script(counter, bash_build);
counter += 1;
} else if (directive->type == TYPE_UNINSTALL) {
fputs("uninstall ", out);
fputs(directive->arg, out);
fputs("\n", out);
}
}
fclose(out);